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19-4323; Rev 10; 8/01
+5V-Powered, Multichannel RS-232 Drivers/Receivers
General Description
The MAX220MAX249 family of line drivers/receivers is intended for all EIA/TIA-232E and V.28/V.24 communications interfaces, particularly applications where ±12V is not available. These parts are especially useful in battery-powered systems, since their low-power shutdown mode reduces power dissipation to less than 5µW. The MAX225, MAX233, MAX235, and MAX245/MAX246/MAX247 use no external components and are recommended for applications where printed circuit board space is critical.
____________________________Features Superior to Bipolar
o Operate from Single +5V Power Supply (+5V and +12V--MAX231/MAX239) o Low-Power Receive Mode in Shutdown (MAX223/MAX242) o Meet All EIA/TIA-232E and V.28 Specifications o Multiple Drivers and Receivers o 3-State Driver and Receiver Outputs o Open-Line Detection (MAX243)
MAX220MAX249
________________________Applications
Portable Computers Low-Power Modems Interface Translation Battery-Powered RS-232 Systems Multidrop RS-232 Networks
PART MAX220CPE MAX220CSE MAX220CWE MAX220C/D MAX220EPE MAX220ESE MAX220EWE MAX220EJE MAX220MJE
Ordering Information
TEMP. RANGE 0°C to +70°C 0°C to +70°C 0°C to +70°C 0°C to +70°C -40°C to +85°C -40°C to +85°C -40°C to +85°C -40°C to +85°C -55°C to +125°C PIN-PACKAGE 16 Plastic DIP 16 Narrow SO 16 Wide SO Dice* 16 Plastic DIP 16 Narrow SO 16 Wide SO 16 CERDIP 16 CERDIP
Ordering Information continued at end of data sheet. *Contact factory for dice specifications.
Selection Table
Part Number MAX220 MAX222 MAX223 (MAX213) MAX225 MAX230 (MAX200) MAX231 (MAX201) MAX232 (MAX202) MAX232A MAX233 (MAX203) MAX233A MAX234 (MAX204) MAX235 (MAX205) MAX236 (MAX206) MAX237 (MAX207) MAX238 (MAX208) MAX239 (MAX209) MAX240 MAX241 (MAX211) MAX242 MAX243 MAX244 MAX245 MAX246 MAX247 MAX248 MAX249 Power Supply (V) +5 +5 +5 +5 +5 +5 and +7.5 to +13.2 +5 +5 +5 +5 +5 +5 +5 +5 +5 +5 and +7.5 to +13.2 +5 +5 +5 +5 +5 +5 +5 +5 +5 +5 No. of RS-232 Drivers/Rx 2/2 2/2 4/5 5/5 5/0 2/2 2/2 2/2 2/2 2/2 4/0 5/5 4/3 5/3 4/4 3/5 5/5 4/5 2/2 2/2 8/10 8/10 8/10 8/9 8/8 6/10 Nominal No. of Cap. Value Ext. Caps (µF) 4 0.1 4 0.1 4 1.0 (0.1) 0 -- 4 1.0 (0.1) 2 1.0 (0.1) 4 4 0 0 4 0 4 4 4 2 4 4 4 4 4 0 0 0 4 4 1.0 (0.1) 0.1 -- -- 1.0 (0.1) -- 1.0 (0.1) 1.0 (0.1) 1.0 (0.1) 1.0 (0.1) 1.0 1.0 (0.1) 0.1 0.1 1.0 -- -- -- 1.0 1.0 SHDN & ThreeState No Yes Yes Yes Yes No No No No No No Yes Yes No No No Yes Yes Yes No No Yes Yes Yes Yes Yes Rx Active in SHDN -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- Data Rate (kbps) 120 200 120 120 120 120 120 (64) 200 120 200 120 120 120 120 120 120 120 120 200 200 120 120 120 120 120 120 Features Ultra-low-power, industry-standard pinout Low-power shutdown MAX241 and receivers active in shutdown Available in SO 5 drivers with shutdown Standard +5/+12V or battery supplies; same functions as MAX232 Industry standard Higher slew rate, small caps No external caps No external caps, high slew rate Replaces 1488 No external caps Shutdown, three state Complements IBM PC serial port Replaces 1488 and 1489 Standard +5/+12V or battery supplies; single-package solution for IBM PC serial port DIP or flatpack package Complete IBM PC serial port Separate shutdown and enable Open-line detection simplifies cabling High slew rate High slew rate, int. caps, two shutdown modes High slew rate, int. caps, three shutdown modes High slew rate, int. caps, nine operating modes High slew rate, selective half-chip enables Available in quad flatpack package
________________________________________________________________ Maxim Integrated Products
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For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at 1-888-629-4642, or visit Maxim's website at www.maxim-ic.com.
+5V-Powered, Multichannel RS-232 Drivers/Receivers MAX220MAX249
ABSOLUTE MAXIMUM RATINGS--MAX220/222/232A/233A/242/243
Supply Voltage (VCC) ...............................................-0.3V to +6V Input Voltages TIN..............................................................-0.3V to (VCC - 0.3V) RIN (Except MAX220) ........................................................±30V RIN (MAX220).....................................................................±25V TOUT (Except MAX220) (Note 1) .......................................±15V TOUT (MAX220)...............................................................±13.2V Output Voltages TOUT ...................................................................................±15V ROUT .........................................................-0.3V to (VCC + 0.3V) Driver/Receiver Output Short Circuited to GND.........Continuous Continuous Power Dissipation (TA = +70°C) 16-Pin Plastic DIP (derate 10.53mW/°C above +70°C)....842mW 18-Pin Plastic DIP (derate 11.11mW/°C above +70°C)....889mW 20-Pin Plastic DIP (derate 8.00mW/°C above +70°C) ..440mW 16-Pin Narrow SO (derate 8.70mW/°C above +70°C) ...696mW 16-Pin Wide SO (derate 9.52mW/°C above +70°C)......762mW 18-Pin Wide SO (derate 9.52mW/°C above +70°C)......762mW 20-Pin Wide SO (derate 10.00mW/°C above +70°C)....800mW 20-Pin SSOP (derate 8.00mW/°C above +70°C) ..........640mW 16-Pin CERDIP (derate 10.00mW/°C above +70°C).....800mW 18-Pin CERDIP (derate 10.53mW/°C above +70°C).....842mW Operating Temperature Ranges MAX2_ _AC_ _, MAX2_ _C_ _ .............................0°C to +70°C MAX2_ _AE_ _, MAX2_ _E_ _ ..........................-40°C to +85°C MAX2_ _AM_ _, MAX2_ _M_ _ .......................-55°C to +125°C Storage Temperature Range .............................-65°C to +160°C Lead Temperature (soldering, 10sec) .............................+300°C
Note 1: Input voltage measured with TOUT in high-impedance state, SHDN or VCC = 0V. Note 2: For the MAX220, V+ and V- can have a maximum magnitude of 7V, but their absolute difference cannot exceed 13V.
Stresses beyond those listed under "Absolute Maximum Ratings" may cause permanent damage to the device. These are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to absolute maximum rating conditions for extended periods may affect device reliability.
ELECTRICAL CHARACTERISTICS--MAX220/222/232A/233A/242/243
(VCC = +5V ±10%, C1C4 = 0.1µF, MAX220, C1 = 0.047µF, C2C4 = 0.33µF, TA = TMIN to TMAX, unless otherwise noted.) PARAMETER RS-232 TRANSMITTERS Output Voltage Swing Input Logic Threshold Low Input Logic Threshold High Logic Pull-Up/lnput Current Output Leakage Current Data Rate Transmitter Output Resistance Output Short-Circuit Current RS-232 RECEIVERS RS-232 Input Voltage Operating Range RS-232 Input Threshold Low RS-232 Input Threshold High RS-232 Input Hysteresis RS-232 Input Resistance TTL/CMOS Output Voltage Low TTL/CMOS Output Voltage High TTL/CMOS Output Short-Circuit Current IOUT = 3.2mA IOUT = -1.0mA Sourcing VOUT = GND Shrinking VOUT = VCC 3.5 -2 10 VCC = 5V VCC = 5V All except MAX243 R2IN MAX243 R2IN (Note 2) All except MAX243 R2IN MAX243 R2IN (Note 2) 0.2 3 0.8 -3 1.8 -0.5 0.5 1 5 0.2 VCC - 0.2 -10 30 7 0.4 2.4 -0.1 1 1.3 ±30 V V V V k V V mA VCC = V+ = V- = 0V, VOUT = ±2V VOUT = 0V 300 ±7 All devices except MAX220 MAX220: VCC = 5.0V All except MAX220, normal operation SHDN = 0V, MAX222/242, shutdown, MAX220 VCC = 5.5V, SHDN = 0V, VOUT = ±15V, MAX222/242 VCC = SHDN = 0V, VOUT = ±15V 2 2.4 5 ±0.01 ±0.01 ±0.01 200 10M ±22 40 ±1 ±10 ±10 116 All transmitter outputs loaded with 3k to GND ±5 ±8 1.4 1.4 0.8 V V V µA µA kb/s mA CONDITIONS MIN TYP MAX UNITS
All except MAX243, VCC = 5V, no hysteresis in shdn. MAX243
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+5V-Powered, Multichannel RS-232 Drivers/Receivers
ELECTRICAL CHARACTERISTICS--MAX220/222/232A/233A/242/243 (continued)
(VCC = +5V ±10%, C1C4 = 0.1µF, MAX220, C1 = 0.047µF, C2C4 = 0.33µF, TA = TMIN to TMAX, unless otherwise noted.) PARAMETER TTL/CMOS Output Leakage Current EN Input Threshold Low EN Input Threshold High Operating Supply Voltage No load VCC Supply Current (SHDN = VCC), Figures 5, 6, 11, 19 3k load both inputs MAX220 MAX222/232A/233A/242/243 MAX220 MAX222/232A/233A/242/243 TA = +25°C Shutdown Supply Current MAX222/242 TA = 0°C to +70°C TA = -40°C to +85°C TA = -55°C to +125°C SHDN Input Leakage Current SHDN Threshold Low SHDN Threshold High MAX222/242 MAX222/242 MAX222/242 CL = 50pF to 2500pF, MAX222/232A/233A/242/243 RL = 3k to 7k, VCC = 5V, TA = +25°C, measured from +3V MAX220 to -3V or -3V to +3V MAX222/232A/233A/242/243 tPHLT MAX220 tPLHT tPHLR tPLHR tPHLS tPLHS MAX222/232A/233A/242/243 MAX220 MAX222/232A/233A/242/243 MAX220 MAX222/232A/233A/242/243 MAX220 MAX242 MAX242 MAX242 MAX242 MAX222/242, 0.1µF caps (includes charge-pump start-up) MAX222/242, 0.1µF caps MAX222/232A/233A/242/243 MAX220 MAX222/232A/233A/242/243 MAX220 2.0 6 1.5 1.4 1.4 12 3 1.3 4 1.5 5 0.5 0.6 0.6 0.8 0.5 2.5 125 160 250 600 300 2000 100 225 30 V/µs 30 3.5 10 3.5 10 1 3 1 3 10 10 500 500 µs ns ns µs ns ns ns µs µs CONDITIONS SHDN = VCC or EN = VCC (SHDN = 0V for MAX222), 0V VOUT VCC MAX242 MAX242 2.0 4.5 0.5 4 12 15 0.1 2 2 35 10 50 50 100 ±1 0.8 µA V V µA MIN TYP ±0.05 1.4 1.4 5.5 2 10 mA MAX ±10 0.8 UNITS µA V V V
MAX220MAX249
Transition Slew Rate
Transmitter Propagation Delay TLL to RS-232 (normal operation), Figure 1
Receiver Propagation Delay RS-232 to TLL (normal operation), Figure 2 Receiver Propagation Delay RS-232 to TLL (shutdown), Figure 2
Receiver-Output Enable Time, Figure 3 tER Receiver-Output Disable Time, Figure 3 tDR Transmitter-Output Enable Time (SHDN goes high), Figure 4 Transmitter-Output Disable Time (SHDN goes low), Figure 4 Transmitter + to - Propagation Delay Difference (normal operation) Receiver + to - Propagation Delay Difference (normal operation) tET tDT tPHLT - tPLHT tPHLR - tPLHR
Note 3: MAX243 R2OUT is guaranteed to be low when R2IN is 0V or is floating. _______________________________________________________________________________________ 3
+5V-Powered, Multichannel RS-232 Drivers/Receivers MAX220MAX249
__________________________________________Typical Operating Characteristics
MAX220/MAX222/MAX232A/MAX233A/MAX242/MAX243
OUTPUT VOLTAGE vs. LOAD CURRENT
MAX220-01
AVAILABLE OUTPUT CURRENT vs. DATA RATE
MAX220-02
MAX222/MAX242 ON-TIME EXITING SHUTDOWN
1µF CAPS V+ V+, V- VOLTAGE (V) +5V +5V 0V 0V 1µF CAPS 0.1µF CAPS VV500µs/div -10V 0.1µF CAPS SHDN V+
MAX220-03
10 8 6 OUTPUT VOLTAGE (V) 4 2 0 -2 -4 -6 -8 -10 0 5 EITHER V+ OR V- LOADED VCC = ±5V NO LOAD ON TRANSMITTER OUTPUTS (EXCEPT MAX220, MAX233A) V- LOADED, NO LOAD ON V+ 0.1µF
1µF
11 10 OUTPUT CURRENT (mA) 9 8 7 6 5 ALL CAPS 0.1µF ALL CAPS 1µF VCC = +5.25V OUTPUT LOAD CURRENT FLOWS FROM V+ TO V-
+10V
0.1µF
1µF
VCC = +4.75V
V+ LOADED, NO LOAD ON V10 15 20 25 LOAD CURRENT (mA)
4 0 10 20 30 40 50 60 DATA RATE (kbits/sec)
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+5V-Powered, Multichannel RS-232 Drivers/Receivers MAX220MAX249
ABSOLUTE MAXIMUM RATINGS--MAX223/MAX230MAX241
VCC ...........................................................................-0.3V to +6V V+ ................................................................(VCC - 0.3V) to +14V V- ............................................................................+0.3V to -14V Input Voltages TIN ............................................................-0.3V to (VCC + 0.3V) RIN......................................................................................±30V Output Voltages TOUT ...................................................(V+ + 0.3V) to (V- - 0.3V) ROUT .........................................................-0.3V to (VCC + 0.3V) Short-Circuit Duration, TOUT ......................................Continuous Continuous Power Dissipation (TA = +70°C) 14-Pin Plastic DIP (derate 10.00mW/°C above +70°C)....800mW 16-Pin Plastic DIP (derate 10.53mW/°C above +70°C)....842mW 20-Pin Plastic DIP (derate 11.11mW/°C above +70°C)....889mW 24-Pin Narrow Plastic DIP (derate 13.33mW/°C above +70°C) ..........1.07W 24-Pin Plastic DIP (derate 9.09mW/°C above +70°C)......500mW 16-Pin Wide SO (derate 9.52mW/°C above +70°C).........762mW 20-Pin Wide SO (derate 10 00mW/°C above +70°C).......800mW 24-Pin Wide SO (derate 11.76mW/°C above +70°C).......941mW 28-Pin Wide SO (derate 12.50mW/°C above +70°C) .............1W 44-Pin Plastic FP (derate 11.11mW/°C above +70°C) .....889mW 14-Pin CERDIP (derate 9.09mW/°C above +70°C) ..........727mW 16-Pin CERDIP (derate 10.00mW/°C above +70°C) ........800mW 20-Pin CERDIP (derate 11.11mW/°C above +70°C) ........889mW 24-Pin Narrow CERDIP (derate 12.50mW/°C above +70°C) ..............1W 24-Pin Sidebraze (derate 20.0mW/°C above +70°C)..........1.6W 28-Pin SSOP (derate 9.52mW/°C above +70°C).............762mW Operating Temperature Ranges MAX2 _ _ C _ _......................................................0°C to +70°C MAX2 _ _ E _ _ ...................................................-40°C to +85°C MAX2 _ _ M _ _ ...............................................-55°C to +125°C Storage Temperature Range .............................-65°C to +160°C Lead Temperature (soldering, 10sec) .............................+300°C
Stresses beyond those listed under "Absolute Maximum Ratings" may cause permanent damage to the device. These are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to absolute maximum rating conditions for extended periods may affect device reliability.
ELECTRICAL CHARACTERISTICS--MAX223/MAX230MAX241
(MAX223/230/232/234/236/237/238/240/241, VCC = +5V ±10; MAX233/MAX235, VCC = 5V ±5%, C1C4 = 1.0µF; MAX231/MAX239, VCC = 5V ±10%; V+ = 7.5V to 13.2V; TA = TMIN to TMAX; unless otherwise noted.) PARAMETER Output Voltage Swing VCC Power-Supply Current CONDITIONS All transmitter outputs loaded with 3k to ground MAX232/233 No load, TA = +25°C MAX223/230/234238/240/241 MAX231/239 MAX231 MAX239 TA = +25°C MAX223 MAX230/235/236/240/241 2.0 2.4 1.5 -30 200 30 V µA V MIN ±5.0 TYP ±7.3 5 7 0.4 1.8 5 15 1 10 15 1 5 15 50 10 0.8 mA µA V mA MAX UNITS V
V+ Power-Supply Current Shutdown Supply Current Input Logic Threshold Low Input Logic Threshold High Logic Pull-Up Current Receiver Input Voltage Operating Range
TIN; EN, SHDN (MAX233); EN, SHDN (MAX230/235241) TIN EN, SHDN (MAX223); EN, SHDN (MAX230/235/236/240/241) TIN = 0V
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+5V-Powered, Multichannel RS-232 Drivers/Receivers MAX220MAX249
ELECTRICAL CHARACTERISTICS--MAX223/MAX230MAX241 (continued)
(MAX223/230/232/234/236/237/238/240/241, VCC = +5V ±10; MAX233/MAX235, VCC = 5V ±5%, C1C4 = 1.0µF; MAX231/MAX239, VCC = 5V ±10%; V+ = 7.5V to 13.2V; TA = TMIN to TMAX; unless otherwise noted.) PARAMETER CONDITIONS Normal operation SHDN = 5V (MAX223) SHDN = 0V (MAX235/236/240/241) Shutdown (MAX223) SHDN = 0V, EN = 5V (R4IN, R5IN) Normal operation SHDN = 5V (MAX223) SHDN = 0V (MAX235/236/240/241) Shutdown (MAX223) SHDN = 0V, EN = 5V (R4IN, R5IN) 0.2 3 MIN 0.8 TYP 1.2 V 0.6 1.5 MAX UNITS
RS-232 Input Threshold Low
TA = +25°C, VCC = 5V
1.7
2.4 V
RS-232 Input Threshold High
TA = +25°C, VCC = 5V
1.5 0.5 5
2.4 1.0 7 0.4 V k V V ±10 µA ns
RS-232 Input Hysteresis RS-232 Input Resistance TTL/CMOS Output Voltage Low TTL/CMOS Output Voltage High TTL/CMOS Output Leakage Current Receiver Output Enable Time
VCC = 5V, no hysteresis in shutdown TA = +25°C, VCC = 5V IOUT = 1.6mA (MAX231/232/233, IOUT = 3.2mA) IOUT = -1mA 0V ROUT VCC; EN = 0V (MAX223); EN = VCC (MAX235241 ) Normal operation Normal operation MAX223 MAX235/236/239/240/241 MAX223 MAX235/236/239/240/241
3.5
VCC - 0.4 0.05 600 400 900 250 0.5 10 40 40 30
Receiver Output Disable Time
ns
Propagation Delay
Normal operation RS-232 IN to TTL/CMOS OUT, SHDN = 0V CL = 150pF (MAX223)
tPHLS tPLHS 3
4 6 5.1
µs
Transition Region Slew Rate
MAX223/MAX230/MAX234241, TA = +25°C, VCC = 5V, RL = 3k to 7k, CL = 50pF to 2500pF, measured from +3V to -3V or -3V to +3V MAX231/MAX232/MAX233, TA = +25°C, VCC = 5V, RL = 3k to 7k, CL = 50pF to 2500pF, measured from +3V to -3V or -3V to +3V VCC = V+ = V- = 0V, VOUT = ±2V
V/µs 4 300 ±10 30 mA mA
Transmitter Output Resistance Transmitter Output Short-Circuit Current
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+5V-Powered, Multichannel RS-232 Drivers/Receivers MAX220MAX249
__________________________________________Typical Operating Characteristics MAX223/MAX230MAX241
TRANSMITTER OUTPUT VOLTAGE (VOH) vs. VCC
MAX220-04
TRANSMITTER OUTPUT VOLTAGE (VOH) vs. LOAD CAPACITANCE AT DIFFERENT DATA RATES
MAX220-05
TRANSMITTER SLEW RATE vs. LOAD CAPACITANCE
1 TRANSMITTER LOADED 11.0 10.0 SLEW RATE (V/µs) 9.0 8.0 7.0 6.0 5.0 4.0 3 TRANSMITTERS LOADED 4 TRANSMITTERS LOADED 0 500 1000 1500 2000 2500 TA = +25°C VCC = +5V LOADED, RL = 3k C1C4 = 1µF 2 TRANSMITTERS LOADED
MAX220-06 MAX220-09
8.5 2 TRANSMITTERS LOADED 8.0 VOH (V)
7.4 7.2 7.0 VOH (V)
12.0
1 TRANSMITTER LOADED 7.5
6.8 6.6 6.4 6.2 6.0 0
7.0
6.5 4.5
3 TRANSMITTERS LOADED TA = +25°C C1C4 = 1µF TRANSMITTER 4 TRANSMITTERS LOADS = 3k || 2500pF LOADED 5.0 VCC (V) 5.5
160kbits/sec 80kbits/sec 20kbits/sec TA = +25°C VCC = +5V 3 TRANSMITTERS LOADED RL = 3k C1C4 = 1µF 500 1000 1500 2000 2500
LOAD CAPACITANCE (pF)
LOAD CAPACITANCE (pF)
TRANSMITTER OUTPUT VOLTAGE (VOL) vs. VCC
4 TRANSMITTERS LOADED TA = +25°C C1C4 = 1µF TRANSMITTER LOADS = 3k || 2500pF
MAX220-07
TRANSMITTER OUTPUT VOLTAGE (VOL) vs. LOAD CAPACITANCE AT DIFFERENT DATA RATES
-6.2 -6.4 -6.6 VOL (V) -6.8 -7.0 -7.2 TA = +25°C VCC = +5V 3 TRANSMITTERS LOADED RL = 3k C1C4 = 1µF 160kbits/sec 80kbits/sec 20Kkbits/sec
MAX220-08
TRANSMITTER OUTPUT VOLTAGE (V+, V-) vs. LOAD CURRENT
10 8 6 4 V+, V- (V) 2 0 -2 -4 TA = +25°C VCC = +5V C1C4 = 1µF V- LOADED, V+ AND VNO LOAD EQUALLY ON V+ LOADED
-6.0 -6.5 -7.0 VOL (V) -7.5 -8.0 -8.5 -9.0 4.5 5.0 VCC (V) 1 TRANSMITTER LOADED 2 TRANSMITTERS LOADED 3 TRANSMITTERS LOADED
-6.0
V+ LOADED, NO LOAD ON V-
-6 -8 -10 0 500 1000 1500 2000 2500 0 5 LOAD CAPACITANCE (pF) ALL TRANSMITTERS UNLOADED 10 15 20 25 30 35 40 45 50 CURRENT (mA)
-7.4 -7.6 5.5
V+, V- WHEN EXITING SHUTDOWN (1µF CAPACITORS)
MAX220-13
V+
O V-
SHDN* 500ms/div *SHUTDOWN POLARITY IS REVERSED FOR NON MAX241 PARTS
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+5V-Powered, Multichannel RS-232 Drivers/Receivers MAX220MAX249
ABSOLUTE MAXIMUM RATINGS--MAX225/MAX244MAX249
Supply Voltage (VCC) ...............................................-0.3V to +6V Input Voltages TIN, ENA, ENB, ENR, ENT, ENRA, ENRB, ENTA, ENTB..................................-0.3V to (VCC + 0.3V) RIN .....................................................................................±25V TOUT (Note 3).....................................................................±15V ROUT ........................................................-0.3V to (VCC + 0.3V) Short Circuit (one output at a time) TOUT to GND ............................................................Continuous ROUT to GND............................................................Continuous Continuous Power Dissipation (TA = +70°C) 28-Pin Wide SO (derate 12.50mW/°C above +70°C) .............1W 40-Pin Plastic DIP (derate 11.11mW/°C above +70°C) ...611mW 44-Pin PLCC (derate 13.33mW/°C above +70°C) ...........1.07W Operating Temperature Ranges MAX225C_ _, MAX24_C_ _ ..................................0°C to +70°C MAX225E_ _, MAX24_E_ _ ...............................-40°C to +85°C Storage Temperature Range .............................-65°C to +160°C Lead Temperature (soldering,10sec) ..............................+300°C
Note 4: Input voltage measured with transmitter output in a high-impedance state, shutdown, or VCC = 0V.
Stresses beyond those listed under "Absolute Maximum Ratings" may cause permanent damage to the device. These are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to absolute maximum rating conditions for extended periods may affect device reliability.
ELECTRICAL CHARACTERISTICS--MAX225/MAX244MAX249
(MAX225, VCC = 5.0V ±5%; MAX244MAX249, VCC = +5.0V ±10%, external capacitors C1C4 = 1µF; TA = TMIN to TMAX; unless otherwise noted.) PARAMETER RS-232 TRANSMITTERS Input Logic Threshold Low Input Logic Threshold High Logic Pull-Up/lnput Current Data Rate Output Voltage Swing Tables 1a1d Normal operation Shutdown ±5 2 1.4 1.4 10 ±0.01 120 ±7.5 ±0.01 ±0.01 300 ±7 10M ±30 ±25 VCC = 5V VCC = 5V VCC = 5V IOUT = 3.2mA IOUT = -1.0mA Sourcing VOUT = GND Shrinking VOUT = VCC Normal operation, outputs disabled, Tables 1a1d, 0V VOUT VCC, ENR_ = VCC 3.5 -2 10 0.2 3 0.8 1.3 1.8 0.5 5 0.2 VCC - 0.2 -10 30 ±0.05 ±0.10 2.4 1.0 7 0.4 ±25 µA ±25 mA V V V V k V V mA µA 50 ±1 64 0.8 V V µA kbits/sec V CONDITIONS MIN TYP MAX UNITS
Tables 1a1d, normal operation All transmitter outputs loaded with 3k to GND ENA, ENB, ENT, ENTA, ENTB = VCC, VOUT = ±15V VCC = 0V, VOUT = ±15V
Output Leakage Current (shutdown)
Tables 1a1d
Transmitter Output Resistance Output Short-Circuit Current RS-232 RECEIVERS RS-232 Input Voltage Operating Range RS-232 Input Threshold Low RS-232 Input Threshold High RS-232 Input Hysteresis RS-232 Input Resistance TTL/CMOS Output Voltage Low TTL/CMOS Output Voltage High TTL/CMOS Output Short-Circuit Current TTL/CMOS Output Leakage Current
VCC = V+ = V- = 0V, VOUT = ±2V (Note 4) VOUT = 0V
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+5V-Powered, Multichannel RS-232 Drivers/Receivers
ELECTRICAL CHARACTERISTICS--MAX225/MAX244MAX249 (continued)
(MAX225, VCC = 5.0V ±5%; MAX244MAX249, VCC = +5.0V ±10%, external capacitors C1C4 = 1µF; TA = TMIN to TMAX; unless otherwise noted.) PARAMETER POWER SUPPLY AND CONTROL LOGIC Operating Supply Voltage No load VCC Supply Current (normal operation) 3k loads on all outputs TA = +25°C TA = TMIN to TMAX Leakage current Control Input AC CHARACTERISTICS Transition Slew Rate Transmitter Propagation Delay TLL to RS-232 (normal operation), Figure 1 Receiver Propagation Delay TLL to RS-232 (normal operation), Figure 2 Receiver Propagation Delay TLL to RS-232 (low-power mode), Figure 2 Transmitter + to - Propagation Delay Difference (normal operation) Receiver + to - Propagation Delay Difference (normal operation) CL = 50pF to 2500pF, RL = 3k to 7k, VCC = 5V, TA = +25°C, measured from +3V to -3V or -3V to +3V tPHLT tPLHT tPHLR tPLHR tPHLS tPLHS tPHLT - tPLHT tPHLR - tPLHR 5 10 1.3 1.5 0.6 0.6 0.6 3.0 350 350 100 100 MAX246MAX249 (excludes charge-pump start-up) Transmitter Enable Time tET MAX225/MAX245MAX249 (includes charge-pump start-up) 5 10 100 500 500 30 3.5 µs 3.5 1.5 µs 1.5 10 µs 10 ns ns ns ns µs ms ns V/µs Threshold low Threshold high 2.4 1.4 1.4 MAX225 MAX244MAX249 MAX225 MAX244MAX249 MAX225 MAX244MAX249 4.75 4.5 10 11 40 57 8 25 50 ±1 0.8 µA µA V 5.25 5.5 20 30 mA V CONDITIONS MIN TYP MAX UNITS
MAX220MAX249
Shutdown Supply Current
Receiver-Output Enable Time, Figure 3 tER Receiver-Output Disable Time, Figure 3 tDR
Transmitter Disable Time, Figure 4
tDT
Note 5: The 300 minimum specification complies with EIA/TIA-232E, but the actual resistance when in shutdown mode or VCC = 0V is 10M as is implied by the leakage specification.
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9
+5V-Powered, Multichannel RS-232 Drivers/Receivers MAX220MAX249
__________________________________________Typical Operating Characteristics
MAX225/MAX244MAX249
TRANSMITTER SLEW RATE vs. LOAD CAPACITANCE
MAX220-10
OUTPUT VOLTAGE vs. LOAD CURRENT FOR V+ AND VMAX220-11
TRANSMITTER OUTPUT VOLTAGE (V+, V-) vs. LOAD CAPACITANCE AT DIFFERENT DATA RATES
8.5 8.0 V+, V (V) 7.5 7.0 6.5 VCC = 5V WITH ALL TRANSMITTERS DRIVEN LOADED WITH 5k 10kb/sec 20kb/sec 40kb/sec 60kb/sec
MAX220-12
18 TRANSMITTER SLEW RATE (V/µs) 16 14 12 10 8 6 4 2 0 1 2 3 4 5 LOAD CAPACITANCE (nF) VCC = 5V
10 8 6 OUTPUT VOLTAGE (V) V+ AND V- LOADED VCC = 5V EXTERNAL CHARGE PUMP 1µF CAPACITORS 8 TRANSMITTERS DRIVING 5k AND 2000pF AT 20kbits/sec V+ AND V- LOADED V+ LOADED EITHER V+ OR V- LOADED
9.0
EXTERNAL POWER SUPPLY 1µF CAPACITORS 40kb/s DATA RATE 8 TRANSMITTERS LOADED WITH 3k
4 2 0 -2 -4 -6 -8 -10 0
V- LOADED 6.0 5.5 5.0 5 10 15 20 25 30 35 0 LOAD CURRENT (mA) 1 200kb/sec ALL CAPACITIORS 1µF 2 3 4 5 100kb/sec
LOAD CAPACITANCE (nF)
10
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+5V-Powered, Multichannel RS-232 Drivers/Receivers MAX220MAX249
+3V +3V INPUT 0V OUTPUT V+ OUTPUT 0V VVCC 50% 50% GND tPHLR tPHLS tPLHR tPLHS 0V* INPUT 50% 50%
tPLHT
tPHLT *EXCEPT FOR R2 ON THE MAX243 WHERE -3V IS USED.
Figure 1. Transmitter Propagation-Delay Timing
Figure 2. Receiver Propagation-Delay Timing
EN RX OUT RX IN a) TEST CIRCUIT 150pF EN INPUT +3V 0V EN OUTPUT ENABLE TIME (tER) +3.5V RECEIVER OUTPUTS +0.8V a) TIMING DIAGRAM b) ENABLE TIMING +3V EN INPUT VOH RECEIVER OUTPUTS VOL c) DISABLE TIMING VOL + 0.5V 0V OUTPUT DISABLE TIME (tDR) VOH - 0.5V VCC - 2V b) TEST CIRCUIT EN 1 OR 0 TX 3k 50pF VV+ +5V 0V -5V RX 1k VCC - 2V SHDN +3V 0V OUTPUT DISABLE TIME (tDT)
Figure 3. Receiver-Output Enable and Disable Timing
Figure 4. Transmitter-Output Disable Timing 11
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+5V-Powered, Multichannel RS-232 Drivers/Receivers MAX220MAX249
Table 1a. MAX245 Control Pin Configurations
ENT 0 0 1 1 ENR 0 1 0 1 OPERATION STATUS Normal Operation Normal Operation Shutdown Shutdown TRANSMITTERS All Active All Active All 3-State All 3-State All Active All 3-State All Low-Power Receive Mode All 3-State RECEIVERS
Table 1b. MAX245 Control Pin Configurations
ENT 0 0 ENR 0 1 OPERATION STATUS Normal Operation Normal Operation TRANSMITTERS TA1TA4 All Active All Active TB1TB4 All Active All Active RECEIVERS RA1RA5 All Active RA1RA4 3-State, RA5 Active All Low-Power Receive Mode RA1RA4 3-State, RA5 Low-Power Receive Mode RB1RB5 All Active RB1RB4 3-State, RB5 Active All Low-Power Receive Mode RB1RB4 3-State, RB5 Low-Power Receive Mode
1
0
Shutdown
All 3-State
All 3-State
1
1
Shutdown
All 3-State
All 3-State
Table 1c. MAX246 Control Pin Configurations
ENA 0 0 ENB 0 1 OPERATION STATUS Normal Operation Normal Operation TRANSMITTERS TA1TA4 All Active All Active TB1TB4 All Active All 3-State RECEIVERS RA1RA5 All Active All Active RA1RA4 3-State, RA5 Active RA1RA4 3-State, RA5 Low-Power Receive Mode RB1RB5 All Active RB1RB4 3-State, RB5 Active All Active RB1RB4 3-State, RA5 Low-Power Receive Mode
1
0
Shutdown
All 3-State
All Active
1
1
Shutdown
All 3-State
All 3-State
12
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+5V-Powered, Multichannel RS-232 Drivers/Receivers
Table 1d. MAX247/MAX248/MAX249 Control Pin Configurations
TRANSMITTERS ENTA ENTB ENRA ENRB OPERATION STATUS Normal Operation Normal Operation Normal Operation Normal Operation Normal Operation Normal Operation Normal Operation Normal Operation Normal Operation Normal Operation Normal Operation Normal Operation MAX247 MAX248 MAX249 0 0 0 0 0 0 0 0 1 1 1 1 0 0 0 0 1 1 1 1 0 0 0 0 0 0 1 1 0 0 1 1 0 0 1 1 0 1 0 1 0 1 0 1 0 1 0 1 TA1TA4 TA1TA4 TA1TA3 All Active All Active All Active All Active All Active All Active All Active All Active All 3-State All 3-State All 3-State All 3-State TB1TB4 TB1TB4 TB1TB3 All Active All Active All Active All Active All 3-State All 3-State All 3-State All 3-State All Active All Active All Active All Active RECEIVERS RA1RA4 RA1RA4 RA1RA5 All Active All Active All 3-State All 3-State All Active All Active All 3-State All 3-State All Active All Active All 3-State All 3-State RB1RB5 RB1RB4 RB1RB5 All Active All 3-State, except RB5 stays active on MAX247 All Active All 3-State, except RB5 stays active on MAX247 All Active All 3-State, except RB5 stays active on MAX247 All Active All 3-State, except RB5 stays active on MAX247 All Active All 3-State, except RB5 stays active on MAX247 All Active All 3-State, except RB5 stays active on MAX247 Low-Power Receive Mode All 3-State, except RB5 stays active on MAX247 Low-Power Receive Mode All 3-State, except RB5 stays active on MAX247
MAX220MAX249
1
1
0
0
Shutdown
All 3-State
All 3-State
Low-Power Receive Mode
1
1
0
1
Shutdown
All 3-State
All 3-State
Low-Power Receive Mode
1
1
1
0
Shutdown
All 3-State
All 3-State
All 3-State
1
1
1
1
Shutdown
All 3-State
All 3-State
All 3-State
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13
+5V-Powered, Multichannel RS-232 Drivers/Receivers MAX220MAX249
_______________Detailed Description
The MAX220MAX249 contain four sections: dual charge-pump DC-DC voltage converters, RS-232 drivers, RS-232 receivers, and receiver and transmitter enable control inputs. mode, in three-state mode, or when device power is removed. Outputs can be driven to ±15V. The powersupply current typically drops to 8µA in shutdown mode. The MAX220 does not have pull-up resistors to force the outputs of the unused drivers low. Connect unused inputs to GND or VCC. The MAX239 has a receiver three-state control line, and the MAX223, MAX225, MAX235, MAX236, MAX240, and MAX241 have both a receiver three-state control line and a low-power shutdown control. Table 2 shows the effects of the shutdown control and receiver threestate control on the receiver outputs. The receiver TTL/CMOS outputs are in a high-impedance, three-state mode whenever the three-state enable line is high (for the MAX225/MAX235/MAX236/MAX239 MAX241), and are also high-impedance whenever the shutdown control line is high. When in low-power shutdown mode, the driver outputs are turned off and their leakage current is less than 1µA with the driver output pulled to ground. The driver output leakage remains less than 1µA, even if the transmitter output is backdriven between 0V and (VCC + 6V). Below -0.5V, the transmitter is diode clamped to ground with 1k series impedance. The transmitter is also zener clamped to approximately V CC + 6V, with a series impedance of 1k. The driver output slew rate is limited to less than 30V/µs as required by the EIA/TIA-232E and V.28 specifications. Typical slew rates are 24V/µs unloaded and 10V/µs loaded with 3 and 2500pF.
Dual Charge-Pump Voltage Converter
The MAX220MAX249 have two internal charge-pumps that convert +5V to ±10V (unloaded) for RS-232 driver operation. The first converter uses capacitor C1 to double the +5V input to +10V on C3 at the V+ output. The second converter uses capacitor C2 to invert +10V to -10V on C4 at the V- output. A small amount of power may be drawn from the +10V (V+) and -10V (V-) outputs to power external circuitry (see the Typical Operating Characteristics section), except on the MAX225 and MAX245MAX247, where these pins are not available. V+ and V- are not regulated, so the output voltage drops with increasing load current. Do not load V+ and V- to a point that violates the minimum ±5V EIA/TIA-232E driver output voltage when sourcing current from V+ and V- to external circuitry. When using the shutdown feature in the MAX222, MAX225, MAX230, MAX235, MAX236, MAX240, MAX241, and MAX245MAX249, avoid using V+ and Vto power external circuitry. When these parts are shut down, V- falls to 0V, and V+ falls to +5V. For applications where a +10V external supply is applied to the V+ pin (instead of using the internal charge pump to generate +10V), the C1 capacitor must not be installed and the SHDN pin must be tied to VCC. This is because V+ is internally connected to VCC in shutdown mode.
RS-232 Receivers
EIA/TIA-232E and V.28 specifications define a voltage level greater than 3V as a logic 0, so all receivers invert. Input thresholds are set at 0.8V and 2.4V, so receivers respond to TTL level inputs as well as EIA/TIA-232E and V.28 levels. The receiver inputs withstand an input overvoltage up to ±25V and provide input terminating resistors with
RS-232 Drivers
The typical driver output voltage swing is ±8V when loaded with a nominal 5k RS-232 receiver and VCC = +5V. Output swing is guaranteed to meet the EIA/TIA232E and V.28 specification, which calls for ±5V minimum driver output levels under worst-case conditions. These include a minimum 3k load, VCC = +4.5V, and maximum operating temperature. Unloaded driver output voltage ranges from (V+ -1.3V) to (V- +0.5V). Input thresholds are both TTL and CMOS compatible. The inputs of unused drivers can be left unconnected since 400k input pull-up resistors to VCC are built in (except for the MAX220). The pull-up resistors force the outputs of unused drivers low because all drivers invert. The internal input pull-up resistors typically source 12µA, except in shutdown mode where the pull-ups are disabled. Driver outputs turn off and enter a high-impedance state--where leakage current is typically microamperes (maximum 25µA)--when in shutdown
14
Table 2. Three-State Control of Receivers
PART MAX223 SHDN SHDN __ Low High High __ EN X Low High __ EN(R) __ Low High Low High X RECEIVERS High Impedance Active High Impedance High Impedance Active High Impedance Active High Impedance
MAX225 MAX235 MAX236 MAX240
__ Low Low High
__
__
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+5V-Powered, Multichannel RS-232 Drivers/Receivers
nominal 5k values. The receivers implement Type 1 interpretation of the fault conditions of V.28 and EIA/TIA-232E. The receiver input hysteresis is typically 0.5V with a guaranteed minimum of 0.2V. This produces clear output transitions with slow-moving input signals, even with moderate amounts of noise and ringing. The receiver propagation delay is typically 600ns and is independent of input swing direction.
Shutdown--MAX222MAX242
On the MAX222, MAX235, MAX236, MAX240, and MAX241, all receivers are disabled during shutdown. On the MAX223 and MAX242, two receivers continue to operate in a reduced power mode when the chip is in shutdown. Under these conditions, the propagation delay increases to about 2.5µs for a high-to-low input transition. When in shutdown, the receiver acts as a CMOS inverter with no hysteresis. The MAX223 and MAX242 also have a receiver output enable input (EN for the MAX242 and EN for the MAX223) that allows receiver output control independent of SHDN (SHDN for MAX241). With all other devices, SHDN (SHDN for MAX241) also disables the receiver outputs. The MAX225 provides five transmitters and five receivers, while the MAX245 provides ten receivers and eight transmitters. Both devices have separate receiver and transmitter-enable controls. The charge pumps turn off and the devices shut down when a logic high is applied to the ENT input. In this state, the supply current drops to less than 25µA and the receivers continue to operate in a low-power receive mode. Driver outputs enter a high-impedance state (three-state mode). On the MAX225, all five receivers are controlled by the ENR input. On the MAX245, eight of the receiver outputs are controlled by the ENR input, while the remaining two receivers (RA5 and RB5) are always active. RA1RA4 and RB1RB4 are put in a three-state mode when ENR is a logic high.
MAX220MAX249
Low-Power Receive Mode
The low-power receive-mode feature of the MAX223, MAX242, and MAX245MAX249 puts the IC into shutdown mode but still allows it to receive information. This is important for applications where systems are periodically awakened to look for activity. Using low-power receive mode, the system can still receive a signal that will activate it on command and prepare it for communication at faster data rates. This operation conserves system power.
Negative Threshold--MAX243
The MAX243 is pin compatible with the MAX232A, differing only in that RS-232 cable fault protection is removed on one of the two receiver inputs. This means that control lines such as CTS and RTS can either be driven or left floating without interrupting communication. Different cables are not needed to interface with different pieces of equipment. The input threshold of the receiver without cable fault protection is -0.8V rather than +1.4V. Its output goes positive only if the input is connected to a control line that is actively driven negative. If not driven, it defaults to the 0 or "OK to send" state. Normally, the MAX243's other receiver (+1.4V threshold) is used for the data line (TD or RD), while the negative threshold receiver is connected to the control line (DTR, DTS, CTS, RTS, etc.). Other members of the RS-232 family implement the optional cable fault protection as specified by EIA/TIA232E specifications. This means a receiver output goes high whenever its input is driven negative, left floating, or shorted to ground. The high output tells the serial communications IC to stop sending data. To avoid this, the control lines must either be driven or connected with jumpers to an appropriate positive voltage level.
Receiver and Transmitter Enable Control Inputs
The MAX225 and MAX245MAX249 feature transmitter and receiver enable controls. The receivers have three modes of operation: full-speed receive (normal active), three-state (disabled), and lowpower receive (enabled receivers continue to function at lower data rates). The receiver enable inputs control the full-speed receive and three-state modes. The transmitters have two modes of operation: full-speed transmit (normal active) and three-state (disabled). The transmitter enable inputs also control the shutdown mode. The device enters shutdown mode when all transmitters are disabled. Enabled receivers function in the low-power receive mode when in shutdown.
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15
+5V-Powered, Multichannel RS-232 Drivers/Receivers
Tables 1a1d define the control states. The MAX244 has no control pins and is not included in these tables. The MAX246 has ten receivers and eight drivers with two control pins, each controlling one side of the device. A logic high at the A-side control input (ENA) causes the four A-side receivers and drivers to go into a three-state mode. Similarly, the B-side control input (ENB) causes the four B-side drivers and receivers to go into a three-state mode. As in the MAX245, one Aside and one B-side receiver (RA5 and RB5) remain active at all times. The entire device is put into shutdown mode when both the A and B sides are disabled (ENA = ENB = +5V). The MAX247 provides nine receivers and eight drivers with four control pins. The ENRA and ENRB receiver enable inputs each control four receiver outputs. The ENTA and ENTB transmitter enable inputs each control four drivers. The ninth receiver (RB5) is always active. The device enters shutdown mode with a logic high on both ENTA and ENTB. The MAX248 provides eight receivers and eight drivers with four control pins. The ENRA and ENRB receiver enable inputs each control four receiver outputs. The ENTA and ENTB transmitter enable inputs control four drivers each. This part does not have an always-active receiver. The device enters shutdown mode and transmitters go into a three-state mode with a logic high on both ENTA and ENTB.
MAX220MAX249
The MAX249 provides ten receivers and six drivers with four control pins. The ENRA and ENRB receiver enable inputs each control five receiver outputs. The ENTA and ENTB transmitter enable inputs control three drivers each. There is no always-active receiver. The device enters shutdown mode and transmitters go into a three-state mode with a logic high on both ENTA and ENTB. In shutdown mode, active receivers operate in a low-power receive mode at data rates up to 20kbits/sec.
__________Applications Information
Figures 5 through 25 show pin configurations and typical operating circuits. In applications that are sensitive to power-supply noise, VCC should be decoupled to ground with a capacitor of the same value as C1 and C2 connected as close as possible to the device.
16
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+5V-Powered, Multichannel RS-232 Drivers/Receivers MAX220MAX249
+5V INPUT C3
TOP VIEW
C5 C1+ 1 V+ 2 C1- 3 C2+ 4 C2- 5 V- 6 T2OUT 7 R2IN 8 16 VCC 15 GND 14 T1OUT C2 1 C1 C1+ 16 VCC +5V TO +10V VOLTAGE DOUBLER V+ 2 +10V 6 -10V C4
3 C14 C2+ +10V TO -10V 5 C2- VOLTAGE INVERTER +5V 400k 11 T1IN
V-
MAX220 MAX232 MAX232A
13 R1IN 12 R1OUT 11 T1IN 10 T2IN 9 R2OUT TTL/CMOS INPUTS
T1OUT 14 +5V 400k RS-232 OUTPUTS T2OUT 7 R1IN 13 5k RS-232 INPUTS R2IN 8 5k GND 15
10 T2IN 12 R1OUT TTL/CMOS OUTPUTS 9 R2OUT
DIP/SO
CAPACITANCE (µF) C1 C2 C3 C4 4.7 4.7 10 10 1.0 1.0 1.0 1.0 0.1 0.1 0.1 0.1
DEVICE MAX220 MAX232 MAX232A
C5 4.7 1.0 0.1
Figure 5. MAX220/MAX232/MAX232A Pin Configuration and Typical Operating Circuit
+5V INPUT C3 ALL CAPACITORS = 0.1µF C5 17 VCC 3 +10V C1+ +5V TO +10V V+ 4 C1- VOLTAGE DOUBLER 5 C2+ 7 -10V +10V TO -10V V6 C2C4 VOLTAGE INVERTER 2 +5V 400k 12 T1IN +5V 400k 11 T2IN 13 R1OUT TTL/CMOS OUTPUTS 10 R2OUT 1 (N.C.) EN ( ) ARE FOR MAX222 ONLY. PIN NUMBERS IN TYPICAL OPERATING CIRCUIT ARE FOR DIP/SO PACKAGES ONLY. GND 16 5k SHDN 18 5k R2IN 9 (EXCEPT MAX220) T1OUT 15 (EXCEPT MAX220) T2OUT 8 R1IN 14 RS-232 INPUTS RS-232 OUTPUTS
TOP VIEW
(N.C.) EN 1 (N.C.) EN 1 C1+ 2 V+ 3 C1- 4 C2+ 5 C2- 6 V- 7 T2OUT 8 R2IN 9 18 SHDN 17 VCC 16 GND 15 T1OUT C1+ 2 V+ 3 C1- 4 C2+ 5 C2- 6 V- 7 T2OUT 8 R2IN 9 R2OUT 10
20 SHDN 19 VCC 18 GND 17 T1OUT
C1
C2
MAX222 MAX242
MAX222 MAX242
16 N.C. 15 R1IN 14 R1OUT 13 N.C. 12 T1IN 11 T2IN TTL/CMOS INPUTS
14 R1IN 13 R1OUT 12 T1IN 11 T2IN 10 R2OUT
DIP/SO
SSOP
Figure 6. MAX222/MAX242 Pin Configurations and Typical Operating Circuit ______________________________________________________________________________________ 17
+5V-Powered, Multichannel RS-232 Drivers/Receivers MAX220MAX249
+5V
TOP VIEW
0.1 +5V T1IN +5V 400k 4 T2IN +5V 400k 25 T3IN +5V 400k 24 T4IN +5V 400k 23 26 5 T5IN ENT T5OUT R1OUT 5k 6 R2OUT 5k 7 R3OUT 5k 22 R4OUT 5k 21 R5OUT 5k 1 2 ENR ENR R5IN 20 R4IN 19 R3IN 8 R2IN 9 R1IN T5OUT 16 15 10 T4OUT 17 T3OUT 18 T2OUT 12 T1OUT 28 VCC 400k 3 ENR 1 ENR 2 T1IN 3 T2IN 4 R1OUT 5 R2OUT 6 R3OUT 7 R3IN 8 R2IN 9 R1IN 10 T1OUT 11 T2OUT 12 GND 13 GND 14 28 VCC 27 VCC 26 ENT 25 T3IN 11 27 VCC
MAX225
24 T4IN 23 T5IN 22 R4OUT 21 R5OUT 20 R5IN 19 R4IN 18 T3OUT 17 T4OUT 16 T5OUT 15 T5OUT
SO
MAX225 FUNCTIONAL DESCRIPTION 5 RECEIVERS 5 TRANSMITTERS 2 CONTROL PINS 1 RECEIVER ENABLE (ENR) 1 TRANSMITTER ENABLE (ENT)
PINS (ENR, GND, VCC, T5OUT) ARE INTERNALLY CONNECTED. CONNECT EITHER OR BOTH EXTERNALLY. T5OUT IS A SINGLE DRIVER.
GND 13
GND 14
Figure 7. MAX225 Pin Configuration and Typical Operating Circuit
18
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+5V-Powered, Multichannel RS-232 Drivers/Receivers MAX220MAX249
TOP VIEW
+5V INPUT 1.0µF 11 VCC +5V TO +10V VOLTAGE DOUBLER +10V TO -10V VOLTAGE INVERTER +5V 7 T1IN T3OUT 1 T1OUT 2 T2OUT 3 R2IN 4 R2OUT 5 T2IN 6 T1IN 7 R1OUT 8 R1IN 9 GND 10 VCC 11 C1+ 12 V+ 13 C1- 14 28 T4OUT 27 R3IN 26 R3OUT 25 SHDN (SHDN) 24 EN (EN) TTL/CMOS INPUTS +5V 20 T3IN +5V 21 T4IN 400k T3 400k T4 T4OUT 28 T3OUT 1 6 T2IN +5V 400k T1 400k T2 T2OUT 3 RS-232 OUTPUTS T1OUT 2
12 1.0µF
C1+
1.0µF V+ 13
14 C115 C2+ 16 C2-
1.0µF
V-
17 1.0µF
MAX223 MAX241
23 R4IN* 22 R4OUT* 21 T4IN 20 T3IN 19 R5OUT* 18 R5IN* 17 V16 C215 C2+ 5 R2OUT 8 R1OUT
R1 5k
R1IN 9
R2 5k
R2IN 4
Wide SO/ SSOP
LOGIC OUTPUTS
26 R3OUT
R3 5k
R3IN
27
RS-232 INPUTS
22 R4OUT
R4 5k
R4IN
23
19 R5OUT *R4 AND R5 IN MAX223 REMAIN ACTIVE IN SHUTDOWN NOTE: PIN LABELS IN ( ) ARE FOR MAX241 24 EN (EN)
R5 5k GND 10
R5IN
18
SHDN 25 (SHDN)
Figure 8. MAX223/MAX241 Pin Configuration and Typical Operating Circuit
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19
+5V-Powered, Multichannel RS-232 Drivers/Receivers MAX220MAX249
TOP VIEW
8 C1+ 10 C1+5V INPUT 1.0µF 7 VCC V+ 9 +5V TO +10V VOLTAGE DOUBLER 13 1.0µF 2 1.0µF
1.0µF T3OUT 1 20 T4OUT 19 T5IN 18 N.C. 17 SHDN 1.0µF T1OUT 2 T2OUT 3 T2IN 4 T1IN 5 GND 6 VCC 7 C1+ 8 V+ 9 C1- 10
MAX230
16 T5OUT 15 T4IN 14 T3IN 13 V12 C211 C2+ TTL/CMOS INPUTS
DIP/SO
11 +10V TO -10V C2+ 12 VC2- VOLTAGE INVERTER +5V 400k T1OUT 5 T1IN T1 +5V 400k T2OUT 4 T2IN T2 +5V 400k T3OUT 14 T3IN T3 +5V 400k T4OUT 15 T4IN T4 +5V 400k T5OUT 19 T5IN T5 GND 6
3
1
RS-232 OUTPUTS
20
16 17 SHDN
N.C. x 18
Figure 9. MAX230 Pin Configuration and Typical Operating Circuit
+5V INPUT
TOP VIEW
1 1.0µF C+ 1 CV2 3 14 V+ 13 VCC 12 GND C+ 1 C- 2 V- 3 T2OUT 4 R2IN 5 R2OUT 6 T2IN 7 N.C. 8 16 V+ 15 VCC 14 GND TTL/CMOS INPUTS 7 (11) TTL/CMOS OUTPUTS 9 (10) 8 T1IN 2
1.0µF 13 (15) C1+ C1+5V 400k T1 400k T2IN R1OUT T2 R1 5k 6 R2OUT VCC +12V TO -12V VOLTAGE CONVERTER
+7.5V TO +12V
V+ V-
14 3
(16) C2 1.0µF (13)
T1OUT 11
+5V T2OUT 4 R1IN 10 (12)
T2OUT 4 R2IN 5 R2OUT 6 T2IN 7
MAX231
11 T1OUT 10 R1IN 9 8 R1OUT T1IN
MAX231
13 T1OUT 12 R1IN 11 R1OUT 10 T1IN 9 N.C.
RS-232 OUTPUTS
DIP SO
RS-232 INPUTS R2IN 5 5k
R2
GND PIN NUMBERS IN ( ) ARE FOR SO PACKAGE 12 (14)
Figure 10. MAX231 Pin Configurations and Typical Operating Circuit 20 ______________________________________________________________________________________
+5V-Powered, Multichannel RS-232 Drivers/Receivers MAX220MAX249
+5V INPUT
TOP VIEW
1.0µF 7 +5V 400k T2IN 1 20 R2OUT 19 R2IN 18 T2OUT 17 VTTL/CMOS INPUTS 1 3 TTL/CMOS OUTPUTS 20 R2OUT 8 (13) DO NOT MAKE CONNECTIONS TO 13 (14) THESE PINS 12 (10) INTERNAL -10 17 POWER SUPPLY INTERNAL +10V POWER SUPPLY C1+ C1V5k T2IN R1OUT 5k 2 T1IN +5V 400k T2OUT 18 RS-232 OUTPUTS R1IN 4 RS-232 OUTPUTS R2IN 19 C2+ C2+ C2C2GND 6 GND 9 10 (11) 11 (12) 15 16 T1OUT 5 VCC
T1IN 2 R1OUT 3 R1IN 4 T1OUT 5 GND 6 VCC 7 (V+) C1+ 8 GND 9 (V-) CS- 10
MAX233 MAX233A
16 C215 C2+ 14 V+ (C1-) 13 C1- (C1+) 12 V- (C2+) 11 C2+ (C2-)
DIP/SO
V14 (8) V+
( ) ARE FOR SO PACKAGE ONLY.
Figure 11. MAX233/MAX233A Pin Configuration and Typical Operating Circuit
+5V INPUT 1.0µF 7 1.0µF 9 10 T1OUT 1 T2OUT 2 T2IN 3 T1IN 4 GND 5 VCC 6 C1+ 7 V+ 8 16 T3OUT 15 T4OUT 14 T4IN 4 T1IN +5V 400k 3 T2IN TTL/CMOS INPUTS 13 T3IN +5V 400k 14 T4IN GND 5
T4 T2
TOP VIEW
C1+ C1C2+
6 VCC +5V TO +10V VOLTAGE DOUBLER +10V TO -10V VOLTAGE INVERTER +5V 400k
T1
1.0µF 8 V+ 12 1.0µF
1.0µF
11 C2-
V-
T1OUT 1
MAX234
13 T3IN 12 V11 C210 C2+ 9 C1-
T2OUT 3 RS-232 OUTPUTS
+5V 400k
T3
T3OUT 16
DIP/SO
T4OUT 15
Figure 12. MAX234 Pin Configuration and Typical Operating Circuit ______________________________________________________________________________________ 21
+5V-Powered, Multichannel RS-232 Drivers/Receivers MAX220MAX249
+5V INPUT
TOP VIEW
1.0µF 12 +5V 400k 8 T1IN +5V 400k 7 T2IN +5V 400k TTL/CMOS INPUTS 15 T3IN +5V 400k 16 T4IN +5V 22 T5IN T4 400k T5 T5OUT 19 T4OUT 1 T3 T3OUT 2 RS-232 OUTPUTS T2 T2OUT 4 T1 T1OUT 3 VCC
T4OUT 1 T3OUT 2 T1OUT 3 T2OUT 4 R2IN 5 R2OUT 6 T2IN 7 T1IN 8 R1OUT 9 R1IN 10 GND 11 VCC 12
24 R3IN 23 R3OUT 22 T5IN 21 SHDN
MAX235
20 EN 19 T5OUT 18 R4IN 17 R4OUT 16 T4IN 15 T3IN 14 R5OUT 13 R5IN
9 R1OUT
T1 5k
R1IN 10
6 R2OUT
R2 5k
R2IN 5
DIP
TTL/CMOS OUTPUTS
23 R3OUT
R3 5k
R3IN 24
RS-232 INPUTS
17 R4OUT
R4 5k
R4IN 18
14 R5OUT
R5 5k
R5IN 13
20 EN GND 11
SHDN
21
Figure 13. MAX235 Pin Configuration and Typical Operating Circuit
22
______________________________________________________________________________________
+5V-Powered, Multichannel RS-232 Drivers/Receivers MAX220MAX249
TOP VIEW
1.0µF
+5V INPUT
9 10 1.0µF 12 13 1.0µF C1+ C1C2+ +10V TO -10V VOLTAGE INVERTER +5V 400k 7 T1IN T3OUT 1 T1OUT 2 T2OUT 3 R1IN 4 R1OUT 5 T2IN 6 T1IN 7 GND 8 VCC 9 C1+ 10 V+ 11 C1- 12 24 T4OUT 23 R2IN 22 R2OUT 21 SHDN TTL/CMOS INPUTS 18 T3IN +5V 400k 19 T4IN T4 T4OUT 24 6 T2IN +5V 400k T3 T3OUT 1 +5V 400k T2 T2OUT 3 T1 T1OUT 2 VCC +5V TO +10V VOLTAGE DOUBLER V+ 11
1.0µF
V-
15 1.0µF
14 C2-
MAX236
20 EN 19 T4IN 18 T3IN 17 R3OUT 16 R3IN 15 V14 C213 C2+ 5 R1OUT
RS-232 OUTPUTS
R1 5k
R1IN 4
DIP/SO
TTL/CMOS OUTPUTS 22 R2OUT R2 5k 17 R3OUT R3IN 5k 20 EN GND 8 SHDN 21 16 R2IN 23 RS-232 INPUTS
R3
Figure 14. MAX236 Pin Configuration and Typical Operating Circuit
______________________________________________________________________________________
23
+5V-Powered, Multichannel RS-232 Drivers/Receivers MAX220MAX249
TOP VIEW
+5V INPUT 1.0µF 9 VCC +5V TO +10V VOLTAGE DOUBLER +10V TO -10V VOLTAGE INVERTER +5V T3OUT 1 T1OUT 2 T2OUT 3 R1IN 4 R1OUT 5 T2IN 6 T1IN 7 GND 8 VCC 9 C1+ 10 V+ 11 C1- 12 24 T4OUT 23 R2IN 22 R2OUT 21 T5IN 6 T2IN +5V TTL/CMOS INPUTS 18 T3IN +5V 19 T4IN +5V 400k 21 T5IN T5 T5OUT 20 400k T4 T4OUT 24 400k T3 T3OUT 1 RS-232 OUTPUTS 7 T1IN +5V 400k T2 T2OUT 3 1.0µF V+ 11
10 1.0µF 12 13 1.0µF 14
C1+ C1C2+ C2-
V-
15 1.0µF
400k T1 T1OUT 2
MAX237
20 T5OUT 19 T4IN 18 T3IN 17 R3OUT 16 R3IN 15 V14 C213 C2+
DIP/SO
5 R1OUT
R1 5k
R1IN 4
TTL/CMOS OUTPUTS
22 R2OUT
R2 5k
R2IN
23
RS-232 INPUTS
17 R3OUT
R3 5k GND 8
R3IN
16
Figure 15. MAX237 Pin Configuration and Typical Operating Circuit
24
______________________________________________________________________________________
+5V-Powered, Multichannel RS-232 Drivers/Receivers MAX220MAX249
TOP VIEW
+5V INPUT 1.0µF 9 10 1.0µF 12 13 1.0µF 14 C1+ C1C2+ C2+5V T2OUT 1 T1OUT 2 R2IN 3 R2OUT 4 T1IN 5 R1OUT 6 R1IN 7 GND 8 VCC 9 C1+ 10 V+ 11 C1- 12 24 T3OUT 23 R3IN 22 R3OUT 21 T4IN 18 T2IN TTL/CMOS INPUTS 19 T3IN +5V 21 T4IN 400k T4 T4OUT 20 +5V 400k T3 T3OUT 24 5 T1IN +5V 400k T2 T2OUT 1 RS-232 OUTPUTS +10V TO -10V VOLTAGE INVERTER 400k T1 T1OUT 2 VVCC +5V TO +10V VOLTAGE DOUBLER V+ 11 1.0µF
15 1.0µF
MAX238
20 T4OUT 19 T3IN 18 T2IN 17 R4OUT 16 R4IN 15 V14 C213 C2+
6 R1OUT
R1 5k
R1IN 7
DIP/SO
TTL/CMOS OUTPUTS
4 R2OUT
R2 5k
R2IN
3 RS-232 INPUTS
22 R3OUT
R3 5k
R3IN
23
17 R4OUT
R4 5k GND 8
R4IN
16
Figure 16. MAX238 Pin Configuration and Typical Operating Circuit
______________________________________________________________________________________
25
+5V-Powered, Multichannel RS-232 Drivers/Receivers MAX220MAX249
TOP VIEW
+5V INPUT 1.0µF 4 6 1.0µF 7 C1+ C1VCC +10V TO -10V VOLTAGE INVERTER 5 V+ V8 1.0µF 7.5V TO 13.2V INPUT
+5V 24 T1IN R1OUT 1 R1IN 2 GND 3 VCC 4 V+ 5 C+ 6 C- 7 V- 8 R5IN 9 R5OUT 10 R4OUT 11 R4IN 12 24 T1IN 23 T2IN 22 R2OUT 21 R2IN TTL/CMOS INPUTS 23 T2IN +5V 16 T3IN +5V
400k T1 400k T2 400k T3 T3OUT 13 T2OUT 20 RS-232 OUTPUTS T1OUT 19
MAX239
20 T2OUT 19 T1OUT 18 R3IN 17 R3OUT 16 T3IN
1 R1OUT
R1 5k
R1IN 2
15 N.C. 14 EN 13 T3OUT 22 R2OUT R2 5k TTL/CMOS OUTPUTS 17 R3OUT R3IN 5k 11 R4OUT R4IN 5k 10 R5OUT R5IN 5k N.C. GND 3 9 12 18 RS-232 INPUTS R2IN 21
DIP/SO
R3
R4
R5
14 EN
15
Figure 17. MAX239 Pin Configuration and Typical Operating Circuit
26
______________________________________________________________________________________
+5V-Powered, Multichannel RS-232 Drivers/Receivers MAX220MAX249
TOP VIEW
+5V INPUT 1.0µF 19 VCC +5V TO +10V VOLTAGE DOUBLER +5V TO -10V VOLTAGE INVERTER +5V 15 T1IN +5V 14 T2IN N.C. R2IN N.C. T2OUT T1OUT T3OUT T4OUT R3IN R3OUT T5IN N.C. +5V TTL/CMOS INPUTS 37 T3IN +5V 38 T4IN +5V 2 T5IN 16 R1OUT 400k T5 R1 5k 13 R2OUT R2IN 10 5k TTL/CMOS OUTPUTS 3 R3OUT R3IN 5k 39 R4OUT R4IN 5k 36 R5OUT R5 5k 42 EN GND 18 SHDN 43 R5IN 35 40 4 RS-232 INPUTS T5OUT 41 400k T4 T4OUT 5 400k T3 T3OUT 6 RS-232 OUTPUTS 400k T2 T2OUT 8 400k T1 T1OUT 7
25 1.0µF
C1+
1.0µF V+ 26
27 C128 C2+ 29 C2-
1.0µF
V-
30 1.0µF
11 10 9 8 7 6 5 4 3 2 1 44 43 42 41 40 39 38 37 36 35 34
N.C. R2OUT T2IN T1IN R1OUT R1IN GND VCC N.C. N.C. N.C.
12 13 14 15 16 17 18 19 20 21 22
MAX240
N.C. SHDN EN T5OUT R4IN R4OUT T4IN T3IN R5OUT R5IN N.C.
R1IN 17
R2
23 24 25 26 27 28 29 30 31 32 33
N.C. N.C. C1+ V+ C1C2+ C2 VN.C. N.C. N.C.
R3
Plastic FP
R4
Figure 18. MAX240 Pin Configuration and Typical Operating Circuit
______________________________________________________________________________________
27
+5V-Powered, Multichannel RS-232 Drivers/Receivers MAX220MAX249
TOP VIEW
+5V INPUT 0.1µF ALL CAPACITORS = 0.1µF 0.1µF
1 0.1µF C1+ 1 V+ 2 C1- 3 C2+ 4 C2- 5 V- 6 T2OUT 7 R2IN 8 16 VCC 15 GND 14 T1OUT
C1+
3 C14 C2+ 5 C2-
16 VCC +5V TO +10V VOLTAGE DOUBLER +10V TO -10V VOLTAGE INVERTER +5V 400k
V+
2
+10V
0.1µF
V-
6
-10V 0.1µF
MAX243
13 R1IN 12 R1OUT 11 T1IN 10 T2IN 9 R2OUT TTL/CMOS INPUTS 10 T2IN 11 T1IN
T1OUT 14 +5V 400k T2OUT 7 RS-232 OUTPUTS
DIP/SO
12 R1OUT TTL/CMOS OUTPUTS 9 R2OUT RECEIVER INPUT -3 V OPEN +3V R1 OUTPUT HIGH HIGH LOW R2 OUTPUT HIGH LOW LOW 5k GND 15 5k R2IN 8 R1IN 13 RS-232 INPUTS
Figure 19. MAX243 Pin Configuration and Typical Operating Circuit
28
______________________________________________________________________________________
+5V-Powered, Multichannel RS-232 Drivers/Receivers MAX220MAX249
+5V
TOP VIEW
1µF 21 TB4OUT TA4OUT TA3OUT TA2OUT TA1OUT TB1OUT TB2OUT TB3OUT 1µF RB5IN 1µF
6 5 4 3 2 1 44 43 42 41 40
1µF 20 VCC +5V TO +10V VOLTAGE DOUBLER +10V TO -10V VOLTAGE INVERTER +5V 400k +5V TB1OUT 44 TB1IN 30 +5V 400k 16 TA2IN 3 TA3OUT 17 TA3IN 4 TA4OUT 18 TA4IN 9 RA1IN 5k 10 RA1OUT 8 RA2IN 5k 11 RA2OUT 7 RA3IN 5k 12 RA3OUT 6 RA4IN 5k 13 RA4OUT 5 RA5IN 5k 14 RA5OUT 5k RB5OUT 31 5k RB4OUT 32 RB5IN 40 5k RB3OUT 33 RB4IN 39 5k RB2OUT 34 RB3IN 38 5k RB1OUT 35 RB2IN 37 +5V 400k TB4IN 27 RB1IN 36 +5V +5V 400k TB3IN 28 TB4OUT 41 +5V TB2IN 29 TB3OUT 42 +5V TB2OUT 43
C1+ 23 C124 C2+ 25 C22 TA1OUT 15 TA1IN 2 TA2OUT
22 V+ 26 V- 1µF
RA4IN RA3IN RA2IN RA1IN RA1OUT RA2OUT RA3OUT RA4OUT RA5OUT TA1IN TA2IN TA3IN
RA5IN
7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28
39 RB4IN 38 RB3IN 37 RB2IN 36 RB1IN 35 RB1OUT 34 RB2OUT 33 RB3OUT 32 RB4OUT 31 RB5OUT 30 TB1IN 29 TB2IN
MAX244
C1-
TA4IN
C2-
TB4IN
PLCC
MAX249 FUNCTIONAL DESCRIPTION 10 RECEIVERS 5 A-SIDE RECEIVER 5 B-SIDE RECEIVER 8 TRANSMITTERS 4 A-SIDE TRANSMITTERS 4 B-SIDE TRANSMITTERS NO CONTROL PINS
TB3IN
C1+
GND
C2+
V+
VCC
V-
GND 19
Figure 20. MAX244 Pin Configuration and Typical Operating Circuit ______________________________________________________________________________________ 29
+5V-Powered, Multichannel RS-232 Drivers/Receivers MAX220MAX249
+5V
TOP VIEW
1µF 40 VCC ENR TA1IN TA2IN TA3IN TA4IN RA5OUT RA4OUT RA3OUT RA2OUT RA1OUT RA1IN RA2IN RA3IN RA4IN RA5IN TA1OUT TA2OUT TA3OUT TA4OUT GND 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 40 39 38 37 36 35 VCC ENT TB1IN TB2IN TB3IN TB4IN RB5OUT RB4OUT RB3OUT RB2OUT RB1OUT RB1IN RB2IN RB3IN RB4IN RB5IN TB1OUT TB2OUT TB3OUT TB4OUT 9 RA2OUT RB2OUT 31 RB3IN 27 5k 5k RB3OUT 32 RB4IN 26 5k 7 RA4OUT 15 RA5IN 5k 6 RA5OUT GND 20 5k RB5OUT 34 5k RB4OUT 33 RB5IN 25 13 RA3IN 10 RA1OUT 12 RA2IN 5k 5k RB1OUT 30 RB2IN 28 11 RA1IN 5k 5k RB1IN 29 18 TA3OUT 4 TA3IN 19 TA4OUT 5 TA4IN 1 ENR +5V 400k TB4IN 35 ENT 39 +5V +5V 400k TB3IN 36 TB4OUT 21 +5V TB3OUT 22 17 TA2OUT 3 TA2IN +5V 400k TB2IN 37 +5V TB2OUT 23 16 TA1OUT 2 TA1IN +5V 400k TB1IN 38 +5V TB1OUT 24
MAX245
34 33 32 31 30 29 28 27 26 25 24 23 22 21
DIP
MAX245 FUNCTIONAL DESCRIPTION 10 RECEIVERS 5 A-SIDE RECEIVERS (RA5 ALWAYS ACTIVE) 5 B-SIDE RECEIVERS (RB5 ALWAYS ACTIVE) 8 TRANSMITTTERS 4 A-SIDE TRANSMITTERS 2 CONTROL PINS 1 RECEIVER ENABLE (ENR) 1 TRANSMITTER ENABLE (ENT)
8 RA3OUT 14 RA4IN
Figure 21. MAX245 Pin Configuration and Typical Operating Circuit 30 ______________________________________________________________________________________
+5V-Powered, Multichannel RS-232 Drivers/Receivers MAX220MAX249
+5V
TOP VIEW
1µF 40 VCC +5V +5V 16 TA1OUT 400k 2 TA1IN +5V 17 TA2OUT 400k 3 TA2IN +5V 18 TA3OUT 400k 4 TA3IN +5V 19 TA4OUT 400k 5 TA4IN 1 ENA 11 RA1IN 5k 10 RA1OUT 12 RA2IN 5k 9 RA2OUT 13 RA3IN 5k 8 RA3OUT 14 RA4IN 5k 7 RA4OUT 15 RA5IN 5k 6 RA5OUT GND 20 5k RB5OUT 34 5k RB4OUT 33 RB5IN 25 5k RB3OUT 32 RB4IN 26 5k RB2OUT 31 RB3IN 27 5k RB1OUT 30 RB2IN 28 TB4IN 35 ENB 39 RB1IN 29 +5V TB4OUT 21 TB3IN 36 +5V TB3OUT 22 TB2IN 37 +5V TB2OUT 23 TB1IN 38 TB1OUT 24
ENA TA1IN TA2IN TA3IN TA4IN RA5OUT RA4OUT RA3OUT RA2OUT RA1OUT RA1IN RA2IN RA3IN RA4IN RA5IN TA1OUT TA2OUT TA3OUT TA4OUT GND
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20
40 39 38 37 36 35
VCC ENB TB1IN TB2IN TB3IN TB4IN RB5OUT RB4OUT RB3OUT RB2OUT RB1OUT RB1IN RB2IN RB3IN RB4IN RB5IN TB1OUT TB2OUT TB3OUT TB4OUT
MAX246
34 33 32 31 30 29 28 27 26 25 24 23 22 21
DIP
MAX246 FUNCTIONAL DESCRIPTION 10 RECEIVERS 5 A-SIDE RECEIVERS (RA5 ALWAYS ACTIVE) 5 B-SIDE RECEIVERS (RB5 ALWAYS ACTIVE) 8 TRANSMITTERS 4 A-SIDE TRANSMITTERS 4 B-SIDE TRANSMITTERS 2 CONTROL PINS ENABLE A-SIDE (ENA) ENABLE B-SIDE (ENB)
Figure 22. MAX246 Pin Configuration and Typical Operating Circuit ______________________________________________________________________________________ 31
+5V-Powered, Multichannel RS-232 Drivers/Receivers MAX220MAX249
+5V
TOP VIEW
1µF 40 VCC +5V +5V 400k 2 TA1IN +5V 17 TA2OUT 400k 3 TA2IN +5V 18 TA3OUT 400k 4 TA3IN +5V 19 TA4OUT 400k 5 TA4IN 6 RB5OUT 5k TB4IN 35 RB5IN 25 +5V TB4OUT 21 TB3IN 36 +5V TB3OUT 22 TB2IN 37 +5V TB2OUT 23 TB1IN 38
1 ENTA ENTA TA1IN TA2IN TA3IN TA4IN RB5OUT RA4OUT RA3OUT RA2OUT RA1OUT ENRA RA1IN RA2IN RA3IN RA4IN TA1OUT TA2OUT TA3OUT TA4OUT GND 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 40 39 38 37 36 35 VCC ENTB TB1IN TB2IN TB3IN TB4IN RB4OUT RB3OUT RB2OUT RB1OUT ENRB RB1IN RB2IN RB3IN RB4IN RB5IN TB1OUT TB2OUT TB3OUT TB4OUT 10 RA1OUT 13 RA2IN 12 RA1IN 5k 16 TA1OUT
ENTB 39 TB1OUT 24
MAX247
34 33 32 31 30 29 28 27 26 25 24 23 22 21
RB1IN 29 5k RB1OUT 31 RB2IN 28 5k 5k RB2OUT 32 RB3IN 27 5k 5k RB3OUT 33 RB4IN 26 5k 5k RB4OUT 34 ENRB 30 GND 20
DIP MAX247 FUNCTIONAL DESCRIPTION 9 RECEIVERS 4 A-SIDE RECEIVERS 5 B-SIDE RECEIVERS (RB5 ALWAYS ACTIVE) 8 TRANSMITTERS 4 A-SIDE TRANSMITTERS 4 B-SIDE TRANSMITTERS 4 CONTROL PINS ENABLE RECEIVER A-SIDE (ENRA) ENABLE RECEIVER B-SIDE (ENRB) ENABLE RECEIVER A-SIDE (ENTA) ENABLE RECEIVERr B-SIDE (ENTB)
9 RA2OUT 14 RA3IN
8 RA3OUT 15 RA4IN
7 RA4OUT 11 ENRA
Figure 23. MAX247 Pin Configuration and Typical Operating Circuit 32 ______________________________________________________________________________________
+5V-Powered, Multichannel RS-232 Drivers/Receivers MAX220MAX249
TOP VIEW
1µF 21 TA4OUT TA3OUT TA2OUT TA1OUT TB1OUT TB2OUT TB3OUT TA4OUT RA3IN RA4IN RB4IN 1µF 1µF 20 VCC +5V TO +10V VOLTAGE DOUBLER +10V TO -10V VOLTAGE INVERTER ENTB 27 +5V 1 TA1OUT RA2IN RA1IN ENRA RA1OUT RA2OUT RA3OUT RA4OUT TA1IN TA2IN TA3IN TA4IN
7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 39 RB3IN 38 RB2IN 37 RB1IN 36 ENRB
+5V 1µF
6
5
4
3
2
1
44 43 42 41 40
C1+ 23 C124 C2+ 25 C218 ENTA
V+ V-
22 26 1µF
+5V TB1OUT 44 400k TB1IN 31
14 TA1IN +5V 2 TA2OUT 400k 15 TA2IN +5V 3 TA3OUT 400k 16 TA3IN +5V 4 TA4OUT 400k 17 TA4IN 8 RA1IN 5k 5k +5V +5V +5V
TB2OUT 43 TB2IN 30 TB3OUT 42 TB3IN 29 TB4OUT 41 TB4IN 28 RB1IN 37
MAX248
35 RB1OUT 34 RB2OUT 33 RB3OUT 32 RB4OUT 31 TB1IN 30 TB2IN 29 TB3IN
C1-
C1+
C2+
C2-
ENTB
PLCC
MAX248 FUNCTIONAL DESCRIPTION
8 RECEIVERS 4 A-SIDE RECEIVERS 4 B-SIDE RECEIVERS 8 TRANSMITTERS 4 A-SIDE TRANSMITTERS 4 B-SIDE TRANSMITTERS 4 CONTROL PINS ENABLE RECEIVER A-SIDE (ENRA) ENABLE RECEIVER B-SIDE (ENRB) ENABLE RECEIVER A-SIDE (ENTA) ENABLE RECEIVER B-SIDE (ENTB)
TB4IN
ENTA
GND
VCC
V+
V-
10 RA1OUT 7 RA2IN 5k 11 RA2OUT 6 RA3IN 5k 12 RA3OUT 5 RA4IN 5k 13 RA4OUT 9 ENRA GND 19
RB1OUT 35 RB2IN 38 5k RB2OUT 34 RB3IN 39 5k RB3OUT 33 RB4IN 40 5k RB4OUT 32 ENRB 36
Figure 24. MAX248 Pin Configuration and Typical Operating Circuit ______________________________________________________________________________________ 33
+5V-Powered, Multichannel RS-232 Drivers/Receivers MAX220MAX249
TOP VIEW
1µF 21 TA3OUT TA2OUT TA1OUT TB1OUT TB2OUT TB3OUT RA3IN RA4IN RA5IN RB5IN RB4IN 1µF 1µF 20 VCC +5V TO +10V VOLTAGE DOUBLER +10V TO -10V VOLTAGE INVERTER ENTB 27 +5V 1 TA1OUT RA2IN RA1IN ENRA RA1OUT RA2OUT RA3OUT RA4OUT RA5OUT TA1IN TA2IN TA3IN
7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 39 RB3IN 38 RB2IN 37 RB1IN 36 ENRB
+5V 1µF
6
5
4
3
2
1
44 43 42 41 40
C1+ 23 C124 C2+ 25 C218 ENTA
V+ V-
22 26 1µF
+5V TB1OUT 44 400k TB1IN 30
15 TA1IN +5V 2 TA2OUT 400k 16 TA2IN +5V 3 TA3OUT 400k 17 TA3IN 8 RA1IN 5k 10 RA1OUT 7 RA2IN 5k 11 RA2OUT 6 RA3IN 5k 12 RA3OUT 5 RA4IN 5k 13 RA4OUT 4 RA5IN 5k 14 RA5OUT 9 ENRA GND 19 5k 5k 5k 5k 5k +5V +5V
TB2OUT 43 TB2IN 29 TB3OUT 42 TB3IN 28 RB1IN 37
MAX249
35 RB1OUT 34 RB2OUT 33 RB3OUT 32 RB4OUT 31 RB5OUT 30 TB1IN 29 TB2IN
C1-
C1+
C2+
C2-
ENTB
TB3IN
ENTA
GND
VCC
V+
V-
RB1OUT 35 RB2IN 38
PLCC
MAX249 FUNCTIONAL DESCRIPTION 10 RECEIVERS 5 A-SIDE RECEIVERS 5 B-SIDE RECEIVERS 6 TRANSMITTERS 3 A-SIDE TRANSMITTERS 3 B-SIDE TRANSMITTERS 4 CONTROL PINS ENABLE RECEIVER A-SIDE (ENRA) ENABLE RECEIVER B-SIDE (ENRB) ENABLE RECEIVER A-SIDE (ENTA) ENABLE RECEIVER B-SIDE (ENTB)
RB2OUT 34 RB3IN 39
RB3OUT 33 RB4IN 40
RB4OUT 32 RB5IN 41
RB5OUT 31 ENRB 36
Figure 25. MAX249 Pin Configuration and Typical Operating Circuit 34 ______________________________________________________________________________________
+5V-Powered, Multichannel RS-232 Drivers/Receivers
___________________________________________Ordering Information (continued)
PART MAX222CPN MAX222CWN MAX222C/D MAX222EPN MAX222EWN MAX222EJN MAX222MJN MAX223CAI MAX223CWI MAX223C/D MAX223EAI MAX223EWI MAX225CWI MAX225EWI MAX230CPP MAX230CWP MAX230C/D MAX230EPP MAX230EWP MAX230EJP MAX230MJP MAX231CPD MAX231CWE MAX231CJD MAX231C/D MAX231EPD MAX231EWE MAX231EJD MAX231MJD MAX232CPE MAX232CSE MAX232CWE MAX232C/D MAX232EPE MAX232ESE MAX232EWE MAX232EJE MAX232MJE MAX232MLP MAX232ACPE MAX232ACSE MAX232ACWE TEMP. RANGE 0°C to +70°C 0°C to +70°C 0°C to +70°C -40°C to +85°C -40°C to +85°C -40°C to +85°C -55°C to +125°C 0°C to +70°C 0°C to +70°C 0°C to +70°C -40°C to +85°C -40°C to +85°C 0°C to +70°C -40°C to +85°C 0°C to +70°C 0°C to +70°C 0°C to +70°C -40°C to +85°C -40°C to +85°C -40°C to +85°C -55°C to +125°C 0°C to +70°C 0°C to +70°C 0°C to +70°C 0°C to +70°C -40°C to +85°C -40°C to +85°C -40°C to +85°C -55°C to +125°C 0°C to +70°C 0°C to +70°C 0°C to +70°C 0°C to +70°C -40°C to +85°C -40°C to +85°C -40°C to +85°C -40°C to +85°C -55°C to +125°C -55°C to +125°C 0°C to +70°C 0°C to +70°C 0°C to +70°C PIN-PACKAGE 18 Plastic DIP 18 Wide SO Dice* 18 Plastic DIP 18 Wide SO 18 CERDIP 18 CERDIP 28 SSOP 28 Wide SO Dice* 28 SSOP 28 Wide SO 28 Wide SO 28 Wide SO 20 Plastic DIP 20 Wide SO Dice* 20 Plastic DIP 20 Wide SO 20 CERDIP 20 CERDIP 14 Plastic DIP 16 Wide SO 14 CERDIP Dice* 14 Plastic DIP 16 Wide SO 14 CERDIP 14 CERDIP 16 Plastic DIP 16 Narrow SO 16 Wide SO Dice* 16 Plastic DIP 16 Narrow SO 16 Wide SO 16 CERDIP 16 CERDIP 20 LCC 16 Plastic DIP 16 Narrow SO 16 Wide SO MAX232AC/D MAX232AEPE MAX232AESE MAX232AEWE MAX232AEJE MAX232AMJE MAX232AMLP MAX233CPP MAX233EPP MAX233ACPP MAX233ACWP MAX233AEPP MAX233AEWP MAX234CPE MAX234CWE MAX234C/D MAX234EPE MAX234EWE MAX234EJE MAX234MJE MAX235CPG MAX235EPG MAX235EDG MAX235MDG MAX236CNG MAX236CWG MAX236C/D MAX236ENG MAX236EWG MAX236ERG MAX236MRG MAX237CNG MAX237CWG MAX237C/D MAX237ENG MAX237EWG MAX237ERG MAX237MRG MAX238CNG MAX238CWG MAX238C/D MAX238ENG 0°C to +70°C -40°C to +85°C -40°C to +85°C -40°C to +85°C -40°C to +85°C -55°C to +125°C -55°C to +125°C 0°C to +70°C -40°C to +85°C 0°C to +70°C 0°C to +70°C -40°C to +85°C -40°C to +85°C 0°C to +70°C 0°C to +70°C 0°C to +70°C -40°C to +85°C -40°C to +85°C -40°C to +85°C -55°C to +125°C 0°C to +70°C -40°C to +85°C -40°C to +85°C -55°C to +125°C 0°C to +70°C 0°C to +70°C 0°C to +70°C -40°C to +85°C -40°C to +85°C -40°C to +85°C -55°C to +125°C 0°C to +70°C 0°C to +70°C 0°C to +70°C -40°C to +85°C -40°C to +85°C -40°C to +85°C -55°C to +125°C 0°C to +70°C 0°C to +70°C 0°C to +70°C -40°C to +85°C Dice* 16 Plastic DIP 16 Narrow SO 16 Wide SO 16 CERDIP 16 CERDIP 20 LCC 20 Plastic DIP 20 Plastic DIP 20 Plastic DIP 20 Wide SO 20 Plastic DIP 20 Wide SO 16 Plastic DIP 16 Wide SO Dice* 16 Plastic DIP 16 Wide SO 16 CERDIP 16 CERDIP 24 Wide Plastic DIP 24 Wide Plastic DIP 24 Ceramic SB 24 Ceramic SB 24 Narrow Plastic DIP 24 Wide SO Dice* 24 Narrow Plastic DIP 24 Wide SO 24 Narrow CERDIP 24 Narrow CERDIP 24 Narrow Plastic DIP 24 Wide SO Dice* 24 Narrow Plastic DIP 24 Wide SO 24 Narrow CERDIP 24 Narrow CERDIP 24 Narrow Plastic DIP 24 Wide SO Dice* 24 Narrow Plastic DIP
MAX220MAX249
* Contact factory for dice specifications. 35
______________________________________________________________________________________
+5V-Powered, Multichannel RS-232 Drivers/Receivers MAX220MAX249
___________________________________________Ordering Information (continued)
PART MAX238EWG MAX238ERG MAX238MRG MAX239CNG MAX239CWG MAX239C/D MAX239ENG MAX239EWG MAX239ERG MAX239MRG MAX240CMH MAX240C/D MAX241CAI MAX241CWI MAX241C/D MAX241EAI MAX241EWI MAX242CAP MAX242CPN MAX242CWN MAX242C/D MAX242EPN MAX242EWN MAX242EJN MAX242MJN TEMP. RANGE -40°C to +85°C -40°C to +85°C -55°C to +125°C 0°C to +70°C 0°C to +70°C 0°C to +70°C -40°C to +85°C -40°C to +85°C -40°C to +85°C -55°C to +125°C 0°C to +70°C 0°C to +70°C 0°C to +70°C 0°C to +70°C 0°C to +70°C -40°C to +85°C -40°C to +85°C 0°C to +70°C 0°C to +70°C 0°C to +70°C 0°C to +70°C -40°C to +85°C -40°C to +85°C -40°C to +85°C -55°C to +125°C PIN-PACKAGE 24 W