M74HC164_03 Datasheet, PDF (2/13 Pages) STMicroelectronics – 8 BIT SIPO SHIFT REGISTER

M74HC164
INPUT AND OUTPUT EQUIVALENT CIRCUIT
PIN DESCRIPTION
PIN No
1,2
3, 4, 5, 6, 10,
11, 12, 13
8
9
7
14
SYMBOL
A, B
QA to QH
CLOCK
CLEAR
GND
Vcc
NAME AND FUNCTION
Data Inputs
Outputs
Clock Input (LOW to
HIGH, Edge Triggered
Master Reset Input
Ground (0V)
Positive Supply Voltage
TRUTH TABLE
INPUTS
OUTPUTS
CLEAR
CLOCK
SERIAL IN
A
B
QA
QB
...........
L
X
X
X
L
L
...........
H
X
X
NO CHANGE
H
L
X
L
QAn
...........
H
X
L
L
QAn
...........
H
H
H
H
QAn
X : Don’t Care
QAn - QGn : The level of QA - QG, respectively. before the most-recent transition of the clock
...........
LOGIC DIAGRAM
QH
L
QGn
QGn
QGn
This logic diagram has not be used to estimate propagation delays
2/13