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SL74HC164

8-Bit Serial-Input/Parallel-Output Shift Register High-Performance Silicon-Gate CMOS

System Logic Semiconductor 

SL74HC164

8-Bit Serial-Input/Parallel-Output

Shift Register

High-Performance Silicon-Gate CMOS

The SL74HC164 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 SL74HC164 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

ORDERING INFORMATION

SL74HC164N Plastic

SL74HC164D SOIC

TA = -55° to 125° C for all packages

LOGIC DIAGRAM

PIN ASSIGNMENT

PIN 14 =VCC

PIN 7 = GND

SLS

System Logic

Semiconductor

FUNCTION TABLE

Inputs

Outputs

Reset Clock A1 A2 QA QB ... QH

L

X

XX

L L ... L

H

XX

no change

H

HD

D QAn ... QGn

H

DH

D QAn ... QGn

D = data input

X = don’t care

QAn - QGn = data shifted from the previous stage on a

rising edge at the clock input.

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