HD74HC4022 Datasheet, PDF (1/8 Pages) Hitachi Semiconductor – Octal Counters/Dividers

HD74HC4022
Octal Counters/Dividers
Description
The HD74HC4022 is a four-stage Johson octal counter with built-in code converter. High speed operation
and spike-free outputs are obtained by use of a Johson octal counter design. The eight decoded outputs are
normally low, and go high only at their appropriate octal time period. The output changes occur on the
positive-going edge of the clock pulse. This part can be used in frequency division application as well as
octal counter or octal decode display applications.
Features
• High Speed Operation
• High Output Current: Fanout of 10 LSTTL Loads
• Wide Operating Voltage: V_CC = 2 to 6 V
• Low Input Current: 1 µA max
• Low Quiescent Supply Current: I_CC (static) = 4 µA max (Ta = 25°C)
Function Table
Clock
L
X
H
X
X
X: Irrelevant
n < 4 ··· Carry = H
n ≥ 4 ··· Carry = L
Clock Enable
X
H
L
X
X
Reset
L
L
L
L
L
L
H
Output n
n
n
n+1
n
n+1
n
Q₀