TECHNICAL DATA

223

8-Bit Serial-Input/Parallel-Output

Shift Register

High-Performance Silicon-Gate CMOS

The IN74HC164 is identical in pinout to the LS/ALS164. The

device inputs are compatible with standard CMOS outputs; with pullup

resistors, they are compatible with LS/ALSTTL outputs.

The IN74HC164 is an 8-bit, serial-input to parallel-output shift

register. Two serial data inputs, A1 and A2, are provided so that one

input may be used as a data enable. Data is entered on each rising edge

of the clock. The active-low asynchronous Reset overrides theClock

and Serial Data inputs.

• Outputs Directly Interface to CMOS, NMOS, and TTL

• Operating Voltage Range: 2.0 to 6.0 V

• Low Input Current: 1.0 µA

• High Noise Immunity Characteristic of CMOS Devices

IN74HC164

ORDERING INFORMATION

IN74HC164N Plastic

IN74HC164D SOIC

LOGIC DIAGRAM

PIN 7 = GND

PIN ASSIGNMENT

FUNCTION TABLE

Inputs

Outputs

Reset

Clock

A1 A2

L

X

X X

L

L

... L

H

X X

no change

H

H D

H

D H

D = data input

X = don’t care

rising edge at the clock input.