M74HCT165 查看數據表（PDF） - STMicroelectronics
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M74HCT165 Datasheet PDF : 12 Pages
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M74HCT165
INPUT AND OUTPUT EQUIVALENT CIRCUIT
PIN DESCRIPTION
PIN No
SYMBOL NAME AND FUNCTION
1
SHIFT/LOAD Data Inputs
2
QH
Complementary Output
7
QH
Serial Output
9
CLOCK
Clock Input (LOW to
HIGH, Edge Triggered
10
SI
Serial Data Inputs
11, 12, 13,
14, 3, 4, 5, 6
A to H
Parallel Data Inputs
15
CLOCK INH Clock Inhibit
8
GND Ground (0V)
16
Vcc
Positive Supply Voltage
TRUTH TABLE
INPUTS
INTERNAL OUTPUTS OUTPUTS
SHIFT /
LOAD
CLOCK INH
CLOCK
SI
A..........H
QA
QB
QH
L
X
X
X
a..........h
a
b
h
H
L
H
X
H
QAn
QGn
H
L
L
X
L
QAn
QGn
H
L
H
X
H
QAn
QGn
H
L
L
X
L
H
X
H
X
X
H
H
X
X
X
a........h : The level of steady input voltage at inputs a through respectively
QAn - QGn : The level of QA - QG, respectively. before the most-recent transition of the clock
QAn
NO CHANGE
NO CHANGE
QGn
LOGIC DIAGRAM
2/12
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