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Product data sheet

Rev. 03 — 12 November 2004

5 of 16

Philips Semiconductors

74HC158

Quad 2-input multiplexer; inverting

6.2 Pin description

7.

Functional description

7.1 Function table

[1]

H = HIGH voltage level;

L = LOW voltage level;

X = don’t care.

Table 3:

Pin description

Symbol

Pin

Description

S

1

common data select input

1I0

2

data input 1 from source 0

1I1

3

data input 1 from source 1

1Y

4

multiplexer output 1

2I0

5

data input 2 from source 0

2I1

6

data input 2 from source 1

2Y

7

multiplexer output 2

GND

8

ground (0 V)

3Y

9

multiplexer output 3

3I1

10

data input 3 from source 1

3I0

11

data input 3 from source 0

4Y

12

multiplexer output 4

4I1

13

data input 4 from source 1

4I0

14

data input 4 from source 0

E

15

enable input (active LOW)

16

positive supply voltage

Table 4:

Function [1]

Control

Input

Output

E

S

nI0

nl1

nY

H

XXXH

LLLX

H

HX

L

HX

L

H

XH

L