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Remote Control Receiver IC Description
PT2249A & PT2250A Series
The PT2249A / PT2250A Series are infra-red remote control receivers utilizing CMOS Technology. Remote Control System can be constructed together with the PT2248 remote control encoder. The PT2249A Series are packaged in 16 pins DIP (PT2249A version is also available in SOP package) and are capable of controlling 10 functions while the PT2250A Series are packaged in 24 pins DIP and are capable of controlling 18 functions. Several options, inverting/non-inverting IR signal input and/or dependent/independent cyclic (toggle) outputs, are provided to fit different application needs.
Features
CMOS Technology Low Power Consumption Very High Noise Immunity Able to output parallel multiple keying signals sent from the transmitter (PT2249A is able to output up to 5 functions simultaneously while PT2250A is able to output up to 6 functions simultaneously) Outputs for single pulse, hold pulse and cyclic pulse are provided A single terminal type oscillator by means of RC is provided Code Detection Circuit prevents interference from various types of machines and apparatus Digital Filtering and Code Checking prevent interference from light sources such as PL Lamp without sacrificing the receiving sensitivity
Applications
Audio Equipment Remote Control Television (TV) Remote Control Video Cassette Recorder (VCR) Remote Control
PT2249A/50A v2.4
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Remote Control Receiver IC Pin Configurations
VSS RXIN HP1 HP2 HP3 HP4 HP5 SP5 1 2 3 4 5 6 7 8 16 15 14 13 12 11 10 9 VCC OSC CODE2 CODE3 SP1 SP2 SP3 SP4
PT2249A & PT2250A Series
VSS RXIN HP1 HP2 HP3 HP4 HP5 CP2
1 2 3 4 5 6 7 8
16 15 14 13 12 11 10 9
VCC OSC CODE2 CODE3 SP1 SP2 SP3 CP1
PT2249A (16 PDIP 300 mil) PT2249A-SN (16 SOP 150 mil)
(16 PDIP 300 mil)
PT2249AI / PT2249AIN PT2249AL / PT2249ALN PT2249AH / PT2249AHN
VSS RXIN HP1 HP2 HP3 HP4 HP5 HP6 CP2 CP1 SP10 SP9
1 2 3 4 5 6 7 8 9 10 11 12
24 23 22 21 20 19 18 17 16 15 14 13
VCC OSC CODE1 CODE2 SP1 SP2 SP3 SP4 SP5 SP6 SP7 SP8
(24 PDIP 600 mil)
PT2250A /PT2250AN PT2250AL / PT2250ALN
ANI LH-
Advanced Version Inversed RXIN Input Independent Cyclic (Toggle) Outputs Advanced Dependent Cyclic (Toggle) Outputs) Output Format same as "L", except that when HP1 or HP2 is active, it will clear CP1.
PT2249A/50A v2.4
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Remote Control Receiver IC Block Diagram
PT2249A & PT2250A Series
PT2249A/50A v2.4
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Remote Control Receiver IC Pin Description
PIN NAME Vss RXIN PT2249A PT2249A-SN 1 2 PIN NUMBER PT2249AI/AIN PT2249AL/ALN PT2249AH/AHN 1 2 PT2250A/AN PT2250AL/ALN 1 2
PT2249A & PT2250A Series
I/O I
DESCRIPTION Negative Power Supply Receiver Input. Instruction signal with carrier wave eliminated should be inputted to this pin. Input signal may be optionally inverted before fed into internal decoding circuit. Hold Pulse. As long as proper signal is received, this output is held at "H" level. (approximately 160ms will be "0" after key is released.) Cyclic Pulse. When receiving signal is inputted, CP1/CP2 is inversed. CP1 output may be optionally governed by (dependent to) the output state of CP2. See Functional Description for details. Single Pulse. When the receiving signal is inputted, the active output will be at "H" level only for a fixed duration of time (approximately 107 msec), then it will return to "L" level. Tx/Rx Matching Code. Transmitter Code is compared with a code set at this terminals and if matched, input is accepted. OSC Input/Output. A resistor and a capacitor are in parallel connection between this terminal and Vss. Positive Power Supply
HP1 ~ HP5 HP6 CP1
3~7 -
3~7 9
3~7 8 10
O O O
CP2 SP1~SP3 SP4 SP5 SP6~SP10 CODE1 CODE2 CODE3 OSC
12~10 9 8 14 13 15
8 12~10 14 13 15
9 20~18 17 16 15~11 22 21 23
O O O O O I I I I/O
Vcc
16
16
24
-
PT2249A/50A v2.4
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Remote Control Receiver IC Functional Description
Oscillation Circuit
PT2249A & PT2250A Series
Timing with transmitter signal and internal operating clock are all decided by this oscillator. Using CMOS Technology, the oscillator of PT2248 transmitter is constructed through a combination of a linear amplifier by connecting C and R between the oscillator terminal and Vss.
Receiving Signal Input Circuit
The signal is received by IR receiver module and the wave is infused into the IC. The RXIN has a built-in Schmitt trigger circuit for shaping received signal waveform to eliminate rounding. PTC has made available various options to suit IR receiving module with positive or negative output. PT2249A Series / PT2250A Series with "N" Option was specially designed for IR modules with negative output. PT2249A Series / PT2250A Series without the "N" Option were specially designed for IR receiving modules with positive output. In these two options, IR signals without external inversion can be fed into the RXIN directly.
PT2249A/50A v2.4
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Remote Control Receiver IC
Receiving Signal Check
PT2249A & PT2250A Series
The receiving signal check is used to check 2 cycle transmitting signals sent from the transmitter to determine if it is a normal signal.
First, the data is stored in the 12-bits shift register. Then, when the second data is pushed into the shift register, the data is forced out of the shift register by one bit where the first data has been stored. The `pushed out' data and the incoming data are checked to see if they match. If there is an error in the receiving signal of the 12-bits data check, the system is reset at that point. Conversely, when all receiving data are checked OK, (HP1 ~HP6 signals) outputs are raised from "L" level to "H" level.
Code Comparison
To prevent interference with other models: C1, C2, and C3 code bits are provided to check whether the transmitter and receiver codes match. It is only when both codes match that the internal latch strobe pulse is generated to latch the receiving data. The output is then raised from "L" level to "H" level. If both codes do not match, no latch strobe pulse is generated and the output remains at "L" level (HPs and SPs) or unchanged (CPs). The Code Bits used differ depending on the receiver. Please refer below.
Note: where C1, C2, C3 will be "1" if one diode is connected between CODE and Tn pins; n=1 to 3 in PT2248; otherwise will be set to "0".
PT2249A/50A v2.4
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Remote Control Receiver IC
Coding
PT2249A & PT2250A Series
CODE1, CODE2 and CODE3 are internally pulled up to Vcc by pull-up resistors. To encode each code bit to "1" : Open the corresponding CODE pin, or Insert a capacitor between CODE pin and Vss. To encode each Code bit to "0" : Connect the corresponding CODE pin to Vss.
Explanation of Output Types: SP, HP and CP
SINGLE PULSE
SP1 ~ SP10 (SINGLE PULSE):
PT2248 - KEY ON
12 BITS 12 BITS
PT2249A/50A RXIN
LATCH STROBE PULSE
SINGLE SHOT OUTPUT (SP1 ~ SP10)
About 107 ms
If there is no error in the receiving signal of the 12-bits data check, it will generate a single pulse output.
PT2249A/50A v2.4
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Remote Control Receiver IC
HOLD PULSE
HP1 ~ HP6 (HOLD PULSE):
PT2249A & PT2250A Series
PT2248 - KEY ON
12 BITS 12 BITS 12 BITS 12 BITS
PT2249A/50A RXIN
LATCH STROBE PULSE
HOLD SHOT OUTPUT (HP1 ~ HP6)
About 160 ms
Normally, after two matched code words (12-bits per word) transmitted from PT2248 is detected, the latch strobe is generated, thereby producing a latch strobe pulse. This causes an "H" state output and this output is sustained at "H" level as long as the continuous signal received. Approximately 160 ms after the key is released and the continuous signal is stopped, the output is reversed to "L" level by above. the last latch strobe pulse. Please refer to the diagram
HP1 ~ HP6 (HOLD PULSE):
PT2248 - KEY ON
12 BITS 12 BITS 12 BITS
PT2249A/50A RXIN
LATCH STROBE PULSE
HOLD SHOT OUTPUT (HP1 ~ HP6)
About 160 ms
Under abnormal conditions where intolerable interference of any kind would cause the receiver to receive only one matched code word during the last transmission (please refer to the diagram above), then approximately 160 ms after the key is released and the hold shot output (continuous signal) is stopped, the output is reversed to "L" level.
PT2249A/50A v2.4 Page 8 Updated August 2001
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Remote Control Receiver IC
PT2249A & PT2250A Series
Under any condition, the HP1 ~ HP6 are able to drive simultaneously a maximum of six outputs at "H" Level by the continuous signals sent from the transmitter. These functions are most applicable for REC-PLAY, REC-PAUSE and CUE/REVIEW of the Tape Deck.
CYCLIC PULSE
CP1 ~ CP2 (CYCLIC PULSE):
PT2248 - KEY ON
12 BITS 12 BITS
12 BITS 12 BITS
PT2249A/PT2250A RXIN
LATCH STROBE PULSE
CYCLIC OUTPUT (CP1 ~ CP2)
When signal is received, the cyclic pulse output is reversed. This cyclic pulse is used for Power ON/OFF, MUTE, etc.
PT2249A/50A v2.4
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Remote Control Receiver IC
PT2249A & PT2250A Series
The relationship between CP1 and CP2 (in the PT2249A Series) is shown in the diagram below:
CP1 KEY ON
PT2248
CP2 KEY ON HP1/HP2 KEY ON RXIN INPUT HP1/HP2 OUTPUT
PT2249A
CP2 OUTPUT PT2249A I Option: CP1 OUTPUT L H
PT2249AL/ALN : CP1 may not be set to "H" level when CP2 is in "H" Level. CP1 is reset to "L" level whenever CP2 is set to "H" level. PT2249AH/AHN: CP1 may not be set to "H" Level when CP2 or HP1 or HP2 is in "H" Level. CP1 is reset to "L" Level whenever CP2 or HP1 or HP2 is set to "H" Level.
PT2249A/50A v2.4
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Remote Control Receiver IC Code Allocation*
* Note : Key No. is of PT2248 KEY NO. 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 PT2248 DATA BIT H S1 S2 D1 T1 T2 T3 K1 1 0 0 1 1 0 0 0 1 0 0 0 1 0 0 0 1 0 0 0 1 0 0 0 0 1 0 1 0 1 0 0 0 1 0 0 0 1 0 0 0 1 0 0 0 1 0 0 0 0 1 1 0 0 1 0 0 0 1 0 0 0 1 0 0 0 1 0 0 0 1 0
PT2249A & PT2250A Series
D2 K2 0 1 0 0 0 0 0 1 0 0 0 0 0 1 0 0 0 0
D3 K3 0 0 1 0 0 0 0 0 1 0 0 0 0 0 1 0 0 0
D4 K4 0 0 0 1 0 0 0 0 0 1 0 0 0 0 0 1 0 0
D5 K5 0 0 0 0 1 0 0 0 0 0 1 0 0 0 0 0 1 0
D6 K6 0 0 0 0 0 1 0 0 0 0 0 1 0 0 0 0 0 1
FUNCTION OF INSTRUCTION (PT2249A OR PT2250A O/P) Continuous Signal Continuous Signal Continuous Signal Continuous Signal Continuous Signal Continuous Signal Single-Shot Signal Single-Shot Signal Single-Shot Signal Single-Shot Signal Single-Shot Signal Single-Shot Signal Single-Shot Signal Single-Shot Signal Single-Shot Signal Single-Shot Signal Cyclic Signal Cyclic Signal HP1 HP2 HP3 HP4 HP5 HP6 SP1 SP2 SP3 SP4 SP5 SP6 SP7 SP8 SP9 SP10 CP1 CP2
C1 ~ C3 Code Bits are available in addition to the above data bits for optional Code Selection. PT2250A/AL/ALN can use all keys. PT2249A/AN are able to use Key Nos. 1 ~ 5 and Key Nos. 7 ~ 11. PT2249AI/AIN/AL/ALN/AH/AHN can use Key Nos. 1 ~ 5, Key Nos. 7 ~ 9, and Key Nos. 17 ~ 18.
PT2249A/50A v2.4
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Remote Control Receiver IC Application Circuit
PT2249A & PT2250A Series
Vcc
CONTROL SIGNAL OUTPUT
1000pF 39K
PT2249A
CONTROL SIGNAL OUTPUT RX INPUT
Vcc CONTROL SIGNAL OUTPUT
1000pF
39K
PT2250A
CONTROL SIGNAL OUTPUT
RX INPUT
PT2249A/50A v2.4
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Remote Control Receiver IC
Application Note:
1. Combination of PT2248/PT2249A Series Code Bits
PT2249A & PT2250A Series
a) PT2249A Series Code Bit C1 is internally pulled high and thereby set at a default value of "1". Thus, PT2248 Code Bit C1 must be set at "1". b) PT2249A Series Code Bits C2 and C3 may be programmed as follows: 1) 2) 3) 4) "0", "0" "0", "1" "1", "0" "1", "1" (This combination is not available with TC9149.)
c) To set Code Bit to "1" on PT2248, diodes must be connected to Code Terminal from the T1 ~ T3 terminals. d) To set Code Bit to "0" on PT2248, the terminals must be kept floating, except C1 - add one diode. e) The Code Bits Combinations of PT2248 and PT2249A Series are shown below: PT2248 C2 0 0 1 1 PT2249A Series C2 C3 0 0 0 1 1 0 1 1
C1 1 1 1 1
C3 0 1 0 1
f) Example : (Refer to Example 1 diagram) The following example shows the case when PT2248 Code Bits C1 = 1, C2 = 1, and C3 = 0. The CODE2 Pin of the PT2249A Series is programmed in floating state and CODE3 pin is connected to Vss (C2 = 1, C3 = 0. ) In this way, the PT2249A Series can match the C2, C3 Code Bits of PT2248 and correctly decode the remote commands.
PT2249A/50A v2.4
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Remote Control Receiver IC
PT2249A & PT2250A Series
PT2248
CODE T3 T2 T1 K6
C3=0
PT2249A Series
CODE3 CODE2 OSC Vcc
C2=1
C2=1 C1=1
C3=0
Example 1
Circuit Diagram when Code Bit C2 = 1 and C3 = 0 2. Combination of PT2248/PT2250A Series Code Bits a) PT2250A Series Code Bit C3 is internally pulled high and thereby set at a default value of "1". Thus, PT2248 Code Bit C3 must be set at "1". b) PT2250A Series Code Bits C2 and C3 may be programmed as follows: 1) 2) 3) 4) "0", "0" "0", "1" "1", "0" "1", "1" (This combination is not available with TC9150.)
c) To set Code Bit to "1" on PT2248, diodes must be connected to Code Terminal from the T1 ~ T3 terminals. d) To set Code Bit to "0" on PT2248, the terminals must be kept floating. e) The Code Bits Combinations of PT2248 and PT2250A Series are shown below: PT2248 PT2250A Series C3 1 1 1 1 C1 0 0 1 1 C2 0 1 0 1
C1 0 0 1 1
C2 0 1 0 1
PT2249A/50A v2.4
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Remote Control Receiver IC
f) Example : (Refer to Example 2 diagram)
PT2249A & PT2250A Series
The following example shows the case when PT2248 Code Bits C1 = 0, C2 = 0, and C3 = 1. The CODE1 and CODE2 pins of the PT2250A Series are connected to the Vss (C1=0 and C2=0). In this way, the PT2250A or any of its series matches the C1 and C2 Code Bits of PT2248; thus, the remote commands are correctly decoded.
PT2248
CODE T3 T2 T1 K6
C1=0 C2=0
PT2250A Series
CODE1 CODE2 OSC Vcc
+5V
C1=0 C2=0
Example 2 Circuit Diagram when Code Bit C1= 0 and C2 = 0
Absolute Maximum Rating
(Ta = 25 oC) PARAMETER Supply Voltage Input/Output Voltage Power Dissipation Operating Temperature Storage Temperature SYMBOL Vcc VIN Pd Topr Tstg RATING 5.5 Vss-0.5 to Vcc+0.5 200 0 ~ +70 -40 ~ +125 UNIT V V mW o C o C
Note: Exceeding the maximum rating may cause permanent damage to devices.
PT2249A/50A v2.4
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Remote Control Receiver IC Electrical Characteristics
PARAMETER Operating Supply Voltage Operating Supply Current Oscillation Frequency Output "H" Level Current "L" Level Pull-up Resistor RXIN Input Current Input Circuit Threshold Voltage Input Hysterestic Voltage PT2249/50A StandPT2249AL by PT2249AHN Current PT2249ALN SYMBOL Vcc Icc fosc IOH IOL Rup IIH VI VHIS
PT2249A & PT2250A Series
(Unless otherwise specified, Vcc = 5 V and Ta = 25 oC)
CONDITION All Function Operations Key on without Load Vcc = 5 V Vo = 4V Vo = 1 V VI = 5V MIN. 2.3 25 -1.0 1.0 150 -1.0 2.0 TYP. 34 300 2.5 0.6 MAX. 5.0 1.0 41 450 1.0 3.0 200 300 300 300 UNIT V mA KHz mA mA K ľA V V
ISB
RXIN=0V OSC=5V (All Outputs floating)
uA
Ordering Information
See Page 2.
PT2249A/50A v2.4
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Remote Control Receiver IC Package Information
16 Pins, SOP Package (150 mil)
PT2249A & PT2250A Series
Symbol A A1 B C D E e H h L
Min. 1.35 0.10 0.33 0.19 9.80 3.80 1.27 BSC. 5.80 0.25 0.40 0o
Max. 1.75 0.25 0.51 0.25 10.00 4.00 6.20 0.50 1.27 8o
Notes: 1. Controlling Dimension: Millimeters 2. Dimensioning and tolerancing per ANSI Y14.5M-1982.
PT2249A/50A v2.4 Page 17 Updated August 2001
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Remote Control Receiver IC
PT2249A & PT2250A Series
3. Dimension D does not include mold flash, protrusions or gate burrs. Mold flash, protrusions and gate burrs shall not exceed 0.15mm (0.006 in) per side. 4. Dimension E does not include interlead flash or protrusions. Interlead flash or protrusions shall not exceed 0.25mm (0.010 in) per side. 5. The chamfer on the body is optional. If it is not present, a visual index feature must be located within the crosshatched area. 6. L is the length of the terminal for soldering to a substrate. 7. N is the number of terminal positions (N=16). 8. The lead width B as measure 0.36mm (0.014in) or greater above the seating plane shall not exceed the maximum value of 0.61 mm (0.024in). 9. Refer to JEDEC MS-012 Variation AC. JEDEC is the registered trademark of JEDEC SOLID STATE TECHNOLGY ASSOCIATION.
PT2249A/50A v2.4
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Remote Control Receiver IC
16 Pins, DIP Package (300 mil)
PT2249A & PT2250A Series
PT2249A/50A v2.4
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Remote Control Receiver IC
Symbol A A1 A2 b b1 b2 b3 c c1 D D1 E E1 e eA eB eC L Notes: 1. 2. 3. Min. 0.015 0.115 0.014 0.014 0.045 0.030 0.008 0.008 0.780 0.005 0.300 0.240
PT2249A & PT2250A Series
Nom. 0.130 0.018 0.018 0.060 0.039 0.010 0.010 0.790 0.310 0.250 0.100 bsc 0.300 bsc 0.130 Max. 0.210 0.195 0.022 0.020 0.070 0.045 0.014 0.011 0.800 0.325 0.280
0.000 0.115
0.430 0.060 0.150
Controlling Dimension: INCHES. Dimensioning and tolerancing per ANSI Y14.5M-1982. Dimensions A, A1 and L are measured with the package seated in JEDEC Seating Plane Gauge GS-3. 4. D, D1 and E1 dimensions do not include mold flash or protrusions. Mold flash or protrusions shall not exceed 0.010 inch. 5. E and eA measured with the leads constrained to be perpendicular to datum -C-. 6. eB and eA are measured at the lead tips with the leads unconstrained. 7. N is the maximum number of terminal positions (N=16). 8. Pointed or rounded lead tips are preferred to ease insertion. 9. b2 and b3 maximum dimensions do not include dambar protrusions. Dambar protrusions shall not exceed 0.010 (0.25mm). 10. Variation AB is a full lead package. 11. Distance between leads including dambar protrusions to be 0.005 in minimum. 12. Datum plane -H- coincident with the bottom of lead where lead exits body. 13. Refer to JEDEC MS-001 Variation AB. JEDEC is the registered trademark of JEDEC SOLID STATE TECHNOLOGY ASSOCIATION.
PT2249A/50A v2.4
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Remote Control Receiver IC
24 Pins, DIP Package (600 mil)
PT2249A & PT2250A Series
Symbol A A1 A2 B B1 C D D1 E E1 e eA eB L
Min. 0.015 0.125 0.014 0.030 0.008 1.150 0.005 0.600 0.485 0.100 bsc 0.600 bsc 0.115
Max. 0.250 0.195 0.022 0.070 0.015 1.290 0.625 0.580
0.700 0.200
PT2249A/50A v2.4
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Remote Control Receiver IC
Notes: 1. 2. 3. 4. 5. 6. 7. 8. 9.
PT2249A & PT2250A Series
Controlling Dimensions: INCH Dimensioning and tolerancing per ANSI Y14.5M-1982. Dimension A, A1 and L are measured with the package seated in JEDEC Seating Plane Gauge GS-3 D and E1 dimensions, for ceramic packages, include allowance for glass overrun and meniscus and lid to base mismatch. D and E1 dimensions for plastic packages, do not include mold, flash to protrusions. Mold flash or protrusions shall not exceed 0.010 inch (0.25mm) E and eA measured with the leads constrained to be perpendicular to plane T. eB and eC are measured at the lead tips with the leads unconstrained. eC must be zero or greater. N is the maximum number of terminal positions. (N=24). Refer to JEDEC MS-011 Variation AA.
JEDEC is the registered trademark of JEDEC SOLID STATE TECHNOLOGY ASSOCIATION.
PT2249A/50A v2.4
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Updated August 2001