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.
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
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•
•
•
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ORDERING INFORMATION
IN74AC164N Plastic
IN74AC164D SOIC
T
A
= -40° to 85° C for all
packages
PIN ASSIGNMENT
LOGIC DIAGRAM
PIN 14 =V
CC
PIN 7 = GND
FUNCTION TABLE
Inputs
Outputs
Res Clock A1 A2
Q
A
Q
B
...
et
Q
H
L
X
X X
L L ... L
H
X X
no change
H
H D
D Q
An
...
Q
Gn
H
D H
D Q
An
...
Q
Gn
D
=
data
input
X
=
don’t
care
Q
An
- Q
Gn
= data shifted from the previous
stage on a rising edge at the clock input.
1
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