Description
The HD74HC4518 dual BCD counter and the HD74HC4520 dual binary counter consist of two identical, independent, internally synchronous 4-stage counters.
Features
- 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.
HD74HC4520 Datasheet
