CD74AC253_08 Datasheet, PDF (2/16 Pages) Texas Instruments – Dual 4-Input Multiplexer, Three-State

Functional Diagram
CD74AC253, CD54/74ACT253
1
1OE
6
1I₀
5
1I₁
4
1I₂
3
1I₃
14
S0
2
S1
10
2I₀
11
2I₁
12
2I₂
13
2I₃
15
2OE
SEL/MUX
7
1Y
SEL/MUX
9
2Y
GND = 8
V_CC = 16
TRUTH TABLE
SELECT INPUTS
DATA INPUTS
ENABLE
INPUTS
OUTPUT
S1
S0
nI₀
nI₁
nI₂
nI₃
nOE
nY
X
X
X
X
X
X
H
Z
L
L
L
X
X
X
L
L
L
L
H
X
X
X
L
H
L
H
X
L
X
X
L
L
L
H
X
H
X
X
L
H
H
L
X
X
L
X
L
L
H
L
X
X
H
X
L
H
H
H
X
X
X
L
L
L
H
H
X
X
X
H
L
H
Select inputs S1 and S0 are common to both sections. H = High level, L = Low inputs, X = Don’t care, Z = High imped-
ance.
2