SL74HC164


System Logic
Semiconductor SLS
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 14 =VCC
PIN 7 = GND

PIN ASSIGNMENT

FUNCTION TABLE
Inputs Outputs
Reset Clock A1 A2 QA QB ... QH
L X X X L L ... L
H X X no change
H 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.