TECHNICAL DATA
IN74AC164
8-Bit Serial-Input/Parallel-Output
Shift register
High-Speed Silicon-Gate CMOS
The IN74AC164 is identical in pinout to the LS/ALS164,
HC/HCT164. The device inputs are compatible with standard CMOS
outputs; with pullup resistors, they are compatible with LS/ALS outputs.
The IN74AC164 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 the Clock and Serial
Data inputs.
ORDERING INFORMATION
IN74AC164N Plastic
IN74AC164D SOIC
TA = -40° to 85° 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; 0.1 μA @ 25°C
High Noise Immunity Characteristic of CMOS Devices
Outputs Source/Sink 24 mA
PIN ASSIGNMENT
LOGIC DIAGRAM
FUNCTION TABLE
Inputs
Clock
X
Outputs
Reset
L
A1 A2
X X
X X
H D
D H
QA QB ... QH
L
L
... L
H
no change
H
D QAn ... QGn
D QAn ... QGn
H
PIN 14 =VCC
PIN 7 = GND
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