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MOTOROLA
SEMICONDUCTOR TECHNICAL DATA
Order this document by MC14499/D
MC14499 7-Segment LED Display Decoder/Driver with Serial Interface
CMOS
The MC14499 is a 7segment alphanumeric LED decoder/driver with a serial interface port to provide communication with CMOS microprocessors and microcomputers. This device features NPN output drivers which allow interfacing to common cathode LED displays through external series resistors. · · · · · · HighCurrent Segment Drivers OnChip CMOS MPU compatible Input Levels Wide Operating Voltage Range: 4.5 to 6.5 V Operating Temperature Range: 0 to 70°C Drives Four Characters with Decimal Points Also See MC14489
20 1
18 1
P SUFFIX PLASTIC DIP CASE 707
DW SUFFIX SOG PACKAGE CASE 751D
ORDERING INFORMATION
MC14499P MC14499DW Plastic DIP SOG Package
PIN ASSIGNMENTS PLASTIC DIP
d 1 2 3 4 5 6 7 8 9 18 17 16 15 14 13 12 11 10 VDD e f g h CLK ENB I II
BLOCK DIAGRAM
DECIMAL POINT D4 Q1 4 BITS C
c b a DATA OSC IV
DATA CLK D Q 4 BITS C*
D20 Q5 16BIT SHIFT REGISTER C 4 4 4 4
III C LATCH 2:1 MUX MUX SEGMENT DRIVERS h g f e d c b a I II III IV VSS
C ENB 4 LATCH
SOG PACKAGE
d SEGMENT OUTPUTS c b a DATA OSC CHARACTER SELECTORS IV III VSS NC 1 2 3 4 5 6 7 8 9 10 20 19 18 17 16 15 14 13 12 11 VDD e f g h CLK ENB I II NC
4
4
4
MULTIPLEXER
B4
A
B
4
SEGMENT DECODER
7
OSC OSCILLATOR DECODER 4 SCANNER BUFFERS
* Transparent Latch
NC = NO CONNECTION
SAME AS IN DL130/D R1
© Motorola, Inc. 1995 MOTOROLA
MC14499 1
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ Á Á Á ÁÁÁ Á Á Á ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ Á Á Á ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ Á Á Á ÁÁÁ Á Á Á ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ Á Á Á ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ Á Á Á ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ Á Á Á ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ Á Á Á ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ Á Á Á ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ Á Á ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ Á Á Á ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ Á Á Á ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ Á Á ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ Á Á Á ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ Á Á Á
MAXIMUM RATINGS* (Voltages referenced to VSS)
Rating Symbol VDD Vin DC Supply Voltage Value Unit V V 0.5 to + 7 Input Voltage, All Inputs 0.5 to VDD + 0.5 65 to + 150 Storage Temperature Range Tstg °C * Maximum Ratings are those values beyond which damage to the device may occur. Functional operation should be restricted to the limits in the Electrical Characteristics table or Circuit Operation section.
This device contains circuitry to protect the inputs against damage due to high static voltages or electric fields; however, it is advised that normal precautions be taken to avoid application of any voltage higher than maximum rated voltages to this high impedance circuit. For proper operation, it is recommended that Vin and Vout be constrained to the range VSS (Vin or Vout) VDD.
ELECTRICAL CHARACTERISTICS (VDD = 4.5 to 6.5 V)
0°C Characteristic Serial Port Input Voltage Serial Port Input Current (Vin = 0 to VDD) Oscillator Input Voltage Oscillator Input Current `0' Level `1' Level VOSC = 0 VOSC = VDD `0' Level `1' Level Symbol VIL VIH Iin VIL VIH IIL IIH VOH -- -- IOZ IOH IOL IDD -- 6 0.2 -- 1.1 0.8 100 -- -- 1 -- -- -- 5.5 0.2 -- 1.0 0.75 50 -- -- 1 -- -- -- 4 0.1 -- 1.1 0.8 100 -- -- 1 mA µA mA Vout = 0.8 V Vout = 0.5 V Min -- 0.7 x VDD -- Max 0.3 x VDD -- ± 0.1 Min -- 0.7 x VDD -- 25°C Max 0.3 x VDD -- ± 0.1 Min -- 0.7 x VDD -- -- 0.8 x VDD 10 10 70°C Max 0.3 x VDD -- ± 1.0 0.2 x VDD -- -- -- Unit V µA V µA V
-- 0.25 x VDD -- 0.25 x VDD 0.75 x VDD -- 0.75 x VDD -- -- -- 100 100 30 30 80 80
Segment Driver Voltage Below VDD Iout = 50 mA Iout = 10 mA Segment Driver Off Leakage Vout = 0 Digit Drivers Source (On) Sink (Off) Supply Current Vin = 0, Iout = 0, COSC = 0.015 µF Maximum Power Dissipation
PD
--
500
--
500
--
500
mW
SWITCHING CHARACTERISTICS (VDD = 5 V ± 10%, TA = 0 to 70°C)
Characteristic Clock High Time Clock Low Time Clock Rise Time Clock Fall Time Enable Lead Time Enable Lag Time Data SetUp Time Data Hold Time Scanner Frequency* OSC/Digit Lead Time OSC/Segment Lead Time Digit Overlap * Scanner Capacitance = 0.022 µF. Figure No. 2 2 2 2 2 2 2 2 4 4 4 4 Symbol tCH tCL tCR tCF tE LEAD tE LAG tD SUP tD HOLD 1/tSCAN tOD tOS tOV Min 2 2 -- -- 200 200 200 1 50 -- -- -- Max -- -- 2 2 -- -- -- -- 300 10 10 5 Unit µs µs µs µs ns ns ns µs Hz µs µs µs
MC14499 2
MOTOROLA
CIRCUIT OPERATION
The circuit accepts a 20bit input, 16 bits for the fourdigit display plus 4 bits for the decimal point -- these latter four bits are optional. The input sequence is the decimal point code followed by the four digits, as shown in Figure 1. In order to enter data the enable input, ENB, must be active low. The sample and shift are accomplished on the falling clock edge, see Figure 2. Data are loaded from the shift register to the latches when ENB goes high. While the shift register is being loaded, the previous data are stored in the latches. If the decimal point is used, the system requires 20 clock pulses to load data; otherwise only 16 are required. CASCADING The circuit may be cascaded in the following manner. If a 1111 word is loaded into the decimal point latch, the output of the shift register is switched to the decimal point driver, see Figure 3. Therefore, to cascade n fourdigit display drivers, a setup is used which loads the 1111 cascading word: 1. ENB = active low. 2. Load 20 bits, the first four bits being 1, with 20 clock pulses. 3. ENB = high, to load the latch. 4. Repeat steps 1 to 3 (n 1) times.
5. (n x 20) bits can be loaded into n circuits, with 1111 as decimal point word to continue the cascading. SCANNER The scanner frequency is determined by an onchip oscillator, which requires an external frequencydetermining capacitor. The capacitor voltage varies between two trigger levels at the oscillator frequency. An external oscillator signal can be used, within the recommended operating range of 200 to 800 Hz. For test purposes this frequency may be increased up to 10 kHz. A divide by four counter provides four nonoverlapping scanner waveforms corresponding to the four digits -- see Figure 4. SEGMENT DECODER The code used in these matrix decoders is shown in Figure 5. OUTPUT DRIVERS There are two different drivers: · The segment and decimal point drivers; these are NPN emitter followers with no current limiting devices. · The digit output buffers; these are shortcircuit protected CMOS devices. A typical application circuit is shown in Figure 6.
TIME BIT NO. 20 19 18 17 16 15 14 13 12 11 10 SHIFT 9 8 7 6 5 4 3 2 1
DIGIT IV
DIGIT III
DIGIT II
DIGIT IV
DIGIT III
DIGIT II
DIGIT I
DECIMAL POINT
Figure 1. Input Sequence
MOTOROLA
DIGIT I
MSB
MSB
MSB
MSB
LSB
LSB
LSB
LSB
MC14499 3
ENB
tE LEAD CLK C1 tCL tCH C2 CN
tE LAG
DATA tDSUP
D1 tDH
D2
DN
Figure 2a. Serial Input, Positive Clock
ENB
tE LEAD CLK C1 tCL tCH C2 CN
tE LAG
DATA
D1 tSUP
D2 tDH
DN
Figure 2b. Serial Input, Negative Clock
Figure 2. Serial Input
4 DIGIT DATA CLK ENB
7 SEGM h
4 DIGIT DATA 10 k CLK ENB
7 SEGM h
MC14499
(1)
MC14499
(2)
Figure 3. Cascading MC14499s
MC14499 4
MOTOROLA
tOD OSC tSCAN DIGIT I
1/tOSC
DIGIT II
DIGIT III
DIGIT IV tOV SEGMENT OUTPUTS tOS
Figure 4. Scanner Waveforms
0000
1000
0001
1001
0010
1010
0011
1011
0100
1100
0101
1101
0110
1110
DASH
0111
1111
BLANK
Figure 5. Segment Code
MOTOROLA
MC14499 5
VDD
SEGMENT OUTPUTS (7) a b c d e f g h R1 R8
IS
ENB DATA CLK
MC14499 OSC
C
IV III II I GND
.
DIGIT OUTPUTS (4) Q1 Q2 #1 ID #2
.
#3
.
#4
Q3 Q4 R1 R8: C: VDD Typ: IS max: ID max: 36 82 0.015 µF 56V 40 50 mA 8 IS max
Figure 6. Application Example
MC14499 6
MOTOROLA
PACKAGE DIMENSIONS
P SUFFIX PLASTIC DIP CASE 70702
NOTES: 1. POSITIONAL TOLERANCE OF LEADS (D), SHALL BE WITHIN 0.25 (0.010) AT MAXIMUM MATERIAL CONDITION, IN RELATION TO SEATING PLANE AND EACH OTHER. 2. DIMENSION L TO CENTER OF LEADS WHEN FORMED PARALLEL. 3. DIMENSION B DOES NOT INCLUDE MOLD FLASH. MILLIMETERS MIN MAX 22.22 23.24 6.10 6.60 3.56 4.57 0.36 0.56 1.27 1.78 2.54 BSC 1.02 1.52 0.20 0.30 2.92 3.43 7.62 BSC 15° 0° 0.51 1.02 INCHES MIN MAX 0.875 0.915 0.240 0.260 0.140 0.180 0.014 0.022 0.050 0.070 0.100 BSC 0.040 0.060 0.008 0.012 0.115 0.135 0.300 BSC 0° 15° 0.020 0.040
18 1
10
B
9
A C L
N F H G D
SEATING PLANE
K M J
DIM A B C D F G H J K L M N
DW SUFFIX SOG PACKAGE CASE 751D04 A
20 11 NOTES: 1. DIMENSIONING AND TOLERANCING PER ANSI Y14.5M, 1982. 2. CONTROLLING DIMENSION: MILLIMETER. 3. DIMENSIONS A AND B DO NOT INCLUDE MOLD PROTRUSION. 4. MAXIMUM MOLD PROTRUSION 0.150 (0.006) PER SIDE. 5. DIMENSION D DOES NOT INCLUDE DAMBAR PROTRUSION. ALLOWABLE DAMBAR PROTRUSION SHALL BE 0.13 (0.005) TOTAL IN EXCESS OF D DIMENSION AT MAXIMUM MATERIAL CONDITION. DIM A B C D F G J K M P R MILLIMETERS MIN MAX 12.65 12.95 7.40 7.60 2.35 2.65 0.35 0.49 0.50 0.90 1.27 BSC 0.25 0.32 0.10 0.25 0_ 7_ 10.05 10.55 0.25 0.75 INCHES MIN MAX 0.499 0.510 0.292 0.299 0.093 0.104 0.014 0.019 0.020 0.035 0.050 BSC 0.010 0.012 0.004 0.009 0_ 7_ 0.395 0.415 0.010 0.029
B
1 10
10X
P 0.010 (0.25)
M
B
M
20X
D
M
0.010 (0.25)
T A
S
B
J
S
F R C T
18X SEATING PLANE X 45 _
G
K
M
MOTOROLA
MC14499 7
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MC14499 8
*MC14499/D*
MC14499/D MOTOROLA