The HD74HC4518 dual BCD counter and the HD74HC4520 dual binary counter consist of two identical, independent, internally synchronous 4-stage counters. The counter stages are type D flip-flops, with interchangeable Clock and Enable lines for incrementing on either the positive-going or negative-going transition as required when cascading multiple stages. Each.
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• High Speed Operation High Output Current: Fanout of 10 LSTTL Loads Wide Operating Voltage: VCC = 2 to 6 V Low Input Current: 1 µA max Low Quiescent Supply Current: ICC (static) = 4 µA max (Ta = 25°C)
Function Table
Clock Enable H L X X L H X X Reset L L L L L L H Operation Increment counter Increment counter No change No change No change No change Q0 to Q 3 = L
HD74HC4518/HD74HC4520
Pin Arrangement
Clock A Enable A Q0 A Q1 A Q2 A Q3 A Reset A GND
1 2 3 4 5 6 7 8 (Top view) C Q0 Q1 Q2 Q3 R R Q3 Q2 Q1 Q0 C
16 VCC 15 Reset B 14 Q3 B 13 Q2 B 12 Q1 B 11 Q0 B 10 Enable B 9 Clock B
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The HD74HC4518 dual BCD counter and the HD74HC4520 dual binary counter consist of two identical, independent, internally.
No. | Partie # | Fabricant | Description | Fiche Technique |
---|---|---|---|---|
1 | HD74HC4511 |
Hitachi Semiconductor |
BCD-to-Seven Segment Latch/Decoder/Driver | |
2 | HD74HC4511 |
Renesas |
BCD-to-Seven Segment Latch/Decoder/Driver | |
3 | HD74HC4514 |
Hitachi Semiconductor |
4-bit Latch/4-to-16-line Decoder | |
4 | HD74HC4515 |
Hitachi Semiconductor |
4-bit Latch/4-to-16-line Decoder | |
5 | HD74HC4518 |
Hitachi Semiconductor |
Dual BCD Use Converters/Dual Binary Up Converters | |
6 | HD74HC4518 |
Renesas |
Dual BCD Up Counters | |
7 | HD74HC4538 |
Hitachi Semiconductor |
Dual Precision Retriggerable/Resettable Monostable Multivibrators | |
8 | HD74HC4538 |
Renesas |
Dual Precision Retriggerable/Resettable Monostable Multivibrators | |
9 | HD74HC4543 |
Hitachi Semiconductor |
BCD-to-Seven Segment Latch/Decoder/Driver | |
10 | HD74HC4543 |
Renesas |
BCD-to-Seven Segment Latch/Decoder/Driver | |
11 | HD74HC4017 |
Hitachi Semiconductor |
Decade Counter/Divider | |
12 | HD74HC4017 |
Renesas |
Decade Counter / Divider |