HD74HC4020
14-stage Binary Counter
Description
The HD74HC4020 is a 14 stage counter. This device is incremented on the falling edge (negative
transition) of the input clock, and all its output is reset to a low level by applying a logical high on its reset
input.
Features
High Speed Operation: t
pd
(Clock to Q
1
) = 14 ns typ (C
L
= 50 pF)
High Output Current: Fanout of 10 LSTTL Loads
Wide Operating Voltage: V
CC
= 2 to 6 V
Low Input Current: 1 A max
Low Quiescent Supply Current: I
CC
(static) = 4 A max (Ta = 25C)
Function Table
Clock
Reset
Outputs State
L
No change
L
Advance to next state
X
H
All output are low
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