HD74HC253 Datasheet, PDF (2/6 Pages) Hitachi Semiconductor – Dual 4-to-1-line Data Selectors/Multiplexers (with 3-state outputs)

HD74HC253
Function Table
Select inputs
Data iputs
Output Control
B
A
C₀
C₁
C₂
C₃
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 1C₃
4 1C₂
5
6
Output 1Y 7
1C1
B
1C0 B
A
1Y A
GND 8
16 VCC
15
2G
Output
control
14 A Select
2C3 13
2C2 12
B
B 2C₁ 11
A
A 2C₀ 10
2Y 9 2Y Output
(Top view)
2