74LVC157A

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Product data sheet

Rev. 7 — 25 November 2011

4 of 17

NXP Semiconductors

74LVC157A

Quad 2-input multiplexer

5.2 Pin description

6.

Functional description

[1]

H = HIGH voltage level; L = LOW voltage level; X = don’t care

Table 2.

Pin description

Symbol

Pin

Description

S

1

common data select input

1I0

2

data input from source 0

1I1

3

data input from source 1

1Y

4

multiplexer output

2I0

5

data input from source 0

2I1

6

data input from source 1

2Y

7

multiplexer output

GND

8

ground (0 V)

3Y

9

multiplexer output

3I1

10

data input from source 1

3I0

11

data input from source 0

4Y

12

multiplexer output

4I1

13

data input from source 1

4I0

14

data input from source 0

E

15

enable input (active LOW)

16

supply voltage

Table 3.

Function table[1]

Input

Output

E

S

nI0

nI1

nY

H

XXXL

LLLX

L

LLH

X

H

LH

X

LL

LH

X

H

H