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零件编号
产品描述 (功能)
HD74AC194 查看數據表(PDF) - Hitachi -> Renesas Electronics
零件编号
产品描述 (功能)
生产厂家
HD74AC194
4-bit Bidirectional Unviersal Shift Register
Hitachi -> Renesas Electronics
HD74AC194 Datasheet PDF : 11 Pages
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Logic Diagram
HD74AC194
D
SL
P
3
P
2
P
1
P
0
D
SR
S
0
S
1
CP
MR
D
C
CQ
CL CL
D
C
CQ
CL CL
D
C
CQ
CL CL
D
C
CQ
CL CL
Q
3
Q
2
Q
1
Q
0
Mode Select Table
Inputs
Output
Operating Mode
Reset
MR
S
1
S
0
D
SR
D
SL
P
n
Q
0
Q
1
Q
2
Q
3
L
X
X
X
X
X
L
L
L
L
Hold
H
L
L
X
X
X
q
0
q
1
q
2
q
3
Shift Left
H
H
L
X
L
X
q
1
q
2
q
3
L
H
H
L
X
H
X
q
1
q
2
q
3
H
Shift Right
H
L
H
L
X
X
L
q
0
q
1
q
2
H
L
H
H
X
X
H
q
0
q
1
q
2
Parallel Load
H
H
H
X
X
p
n
p
0
p
1
p
2
p
3
H : HIGH Voltage Level
L : LOW Voltage Level
p
n
(q
n
) : Lower case letters indicate the state of the referenced input (or output) one setup time prior to the
LOW-to-HIGH clock transition
X : Immaterial
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