HD74HC4022 Просмотр технического описания (PDF) - Hitachi -> Renesas Electronics

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HD74HC4022

Octal Counters/Dividers

Hitachi -> Renesas Electronics 

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: 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

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

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