TECHNICAL DATA
IN74HC164А
8-Bit Serial-Input/Parallel-Output
Shift Register
High-Performance Silicon-Gate CMOS
The IN74HC164A 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 IN74HC164A 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.
ORDERING INFORMATION
IN74HC164АN Plastic
IN74HC164АD SOIC
TA = -55° to 125° C for all packages
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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
PIN ASSIGNMENT
LOGIC DIAGRAM
FUNCTION TABLE
Inputs
Outputs
RESET CLOCK
A1 A2
X X
QA QB…QH
L
H
H
X
L
L… L
X X
no change
PIN 14 =VCC
PIN 7 = GND
H D
D
QAn…QGn
H
D H
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.
Rev. 00
IKSEMICON [ IK SEMICON CO., LTD ]
