HD74LS253 Datasheet, PDF (2/6 Pages) Hitachi Semiconductor – Dual 4-line-to-1-line Data Selectors/Multiplexers(with three-state outputs)

HD74LS253
Function Table
Select inputs
Data inputs
B
A
C₀
C₁
C₂
X
X
X
X
X
L
L
L
X
X
L
L
H
X
X
L
H
X
L
X
L
H
X
H
X
H
L
X
X
L
H
L
X
X
H
H
H
X
X
X
H
H
X
X
X
Notes: 1. H; high level, L; low level, X; irrelevant
2. Address inputs A and B are common to both sections.
Block Diagram
Output 1G
Control
1C0
1C1
Data 1
1C2
1C3
B
Select
A
2C0
2C1
Data 2
2C2
2C3
Output
2G
Control
Output
control
Output
C₃
G
Y
X
H
Z
X
L
L
X
L
H
X
L
L
X
L
H
X
L
L
X
L
H
L
L
L
H
L
H
Output
1Y
Output
2Y
Absolute Maximum Ratings
Item
Symbol
Ratings
Unit
Supply voltage
V_CC
7
V
Input voltage
V_IN
7
V
Output voltage (off-state)
Operating temperature
V_{O (off)}
5.5
V
Topr
–20 to +75
°C
Power dissipation
Storage temperature
P_T
Tstg
400
mW
–65 to +150
°C
Note: Voltage value, unless otherwise noted, are with respect to network ground terminal.
Rev.3.00, Jul.15.2005, page 2 of 5