m54hc166k1 STMicroelectronics, m54hc166k1 Datasheet - Page 2

• Manufacturer Part Number: m54hc166k1
• Description: 8 Bit Piso Shift Register
• Manufacturer: STMicroelectronics

M54HC166
IEC LOGIC SYMBOLS
INPUT AND OUTPUT EQUIVALENT CIRCUIT
TRUTH TABLE
X : Don’t Care
a........h : The level of steady input voltage at inputs a through H respectively
2/11
CLEAR
H
H
H
H
L
L
SHIFT/
LOAD
X
X
H
H
X
L
CLOCK
INH
H
X
X
L
L
L
INPUTS
CLOCK
X
X
SERIAL IN
X
X
X
H
X
L
PIN DESCRIPTION
2, 3, 4, 5, 10,
11, 12, 14
PIN N°
13
15
16
PARALLEL
a..............h
1
6
7
9
8
A..........H
X
X
X
X
X
SHIFT/LOAD
CLOCK INH
SYMBOL
CLOCK
CLEAR
A to H
GND
V
INTERNAL OUTPUTS OUTPUTS
Q
SI
CC
H
QA
H
L
a
L
Serial Data Inputs
Parallel Data Inputs
Clock Enable Input
(Active Low)
Clock Input (LOW to
HIGH, Edge Triggered
Asynchronous Master
Reset Input (Active Low)
Serial Output from the
Last Stage
Parallel Enable Input
(Active Low)
Ground (0V)
Positive Supply Voltage
NAME AND FUNCTION
NO CHANGE
NO CHANGE
QAn
QAn
QB
L
b
QGn
QGn
QH
L
h