74HCT165 查看數據表（PDF） - Philips Electronics
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74HCT165 Datasheet PDF : 10 Pages
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Philips Semiconductors
8-bit parallel-in/serial-out shift register
Product specification
74HC/HCT165
Fig.4 Functional diagram.
FUNCTION TABLE
OPERATING MODES
INPUTS
Qn REGISTERS
parallel load
serial shift
hold “do nothing”
PL
L
L
H
H
H
CE
X
X
L
L
H
CP
X
X
↑
↑
X
DS
X
X
l
h
X
D0-D7
L
H
X
X
X
Q0
L
H
L
H
q0
Q1-Q6
L-L
H-H
q0-q5
q0-q5
q1-q6
Note
1. H = HIGH voltage level
h = HIGH voltage level one set-up time prior to the LOW-to-HIGH clock transition
L = LOW voltage level
I = LOW voltage level one set-up time prior to the LOW-to-HIGH clock transition
q = lower case letters indicate the state of the referenced output one set-up time prior to the
LOW-to-HIGH clock transition
X = don’t care
↑ = LOW-to-HIGH clock transition
OUTPUTS
Q7
L
H
q6
q6
q7
Q7
H
L
q6
q6
q7
December 1990
Fig.5 Logic diagram.
4
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