CD54HC257_14 Datasheet, PDF (2/15 Pages) Texas Instruments – High-Speed CMOS Logic Quad 2-Input Multiplexer with Three-State Non-Inverting Outputs

CD54HC257, CD74HC257, CD54HCT257, CD74HCT257
Functional Diagram
15
OE
1
S
13
4I₁
14
4I₀
10
3I₁
11
3I₀
6
2I₁
5
2I₀
3
1I₁
2
1I₀
P
12
4Y
N
3 CIRCUITS IDENTICAL TO CIRCUIT
IN ABOVE DASHED ENCLOSURE
9
3Y
7
2Y
4
1Y
TRUTH TABLE
OUTPUT SELECT
ENABLE INPUT
DATA INPUTS
OE
S
I₀
I₁
H
X
X
X
L
L
L
X
L
L
H
X
L
H
X
L
L
H
X
H
H= High Voltage Level
L= Low Voltage Level
X= Don’t Care
Z= High Impedance, OFF State
OUTPUT
Y
Z
L
H
L
H
2