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零件编号
产品描述 (功能)
HD74HC253 查看數據表(PDF) - Hitachi -> Renesas Electronics
零件编号
产品描述 (功能)
比赛名单
HD74HC253
Dual 4-to-1-line Data Selectors/Multiplexers (with 3-state outputs)
Hitachi -> Renesas Electronics
HD74HC253 Datasheet PDF : 6 Pages
1
2
3
4
5
6
HD74HC253
Function Table
Select inputs
Data iputs
Output Control
B
A
C
0
C
1
C
2
C
3
G
X
X
X
X
X
X
H
L
L
L
X
X
X
L
L
L
H
X
X
X
L
L
H
X
L
X
X
L
L
H
X
H
X
X
L
H
L
X
X
L
X
L
H
L
X
X
H
X
L
H
H
X
X
X
L
L
H
H
X
X
X
H
L
Notes 1. X: irrelevant
2. Address inputs A and B are common to both sections.
Output
Y
Z
L
H
L
H
L
H
L
H
Pin Arrangement
Output
control
1G
1
Select B 2
3
1C
3
4
1C
2
5
6
Output 1Y 7
1C
1
B
1C
0
B
A
1Y
A
GND 8
16 VCC
15
2G
Output
control
14 A Select
2C
3
13
2C
2
12
B
B
2C
1
11
A
A
2C
0
10
2Y
9 2Y Output
(Top view)
2
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