74HC158 Datasheet, PDF (2/6 Pages) NXP Semiconductors – Quad 2-input multiplexer; inverting

CD74HC157, CD74HCT157, CD74HC158, CD74HCT158
Functional Diagram
2
1I₀
3
1I₁
2I₀ ⁵
6
2I₁
11
3I₀
10
3I₁
14
4I₀
13
4I₁
S
E
1 15
HC/HCT HC/HCT
157
158
4
1Y
1Y
7
2Y
2Y
9
3Y
3Y
12
4Y
4Y
TRUTH TABLE
SELECT
ENABLE INPUT
DATA INPUTS
OUTPUT
157
158
E
S
I0
I1
Y
Y
H
X
X
X
L
H
L
L
L
X
L
H
L
L
H
X
H
L
L
H
X
L
L
H
L
H
X
H
H
L
NOTE: H = High Voltage Level, L = Low Voltage Level, X = Don’t Care
2