MOTOROLA

SEMICONDUCTOR TECHNICAL DATA

1

REV 0

6/97

Quad 2-Channel Multiplexer

With 5V-Tolerant Inputs

The MC74LVX157 is an advanced high speed CMOS quad 2–channel

multiplexer. The inputs tolerate voltages up to 7V, allowing the interface of

5V systems to 3V systems.

It consists of four 2–input digital multiplexers with common select (S)

and enable (E) inputs. When E is held High, selection of data is inhibited

and all the outputs go Low.

The select decoding determines whether the I0n or I1n inputs get

routed to the corresponding Zn outputs.

15

16

14

13

12

11

10

2

1

3

4

567

VCC

9

8

E

I0c

I1c

Zc

I0d

I1d

Zd

S

I0a

I1a

Za

I0b

I1b

Zb

GND

Figure 1. 16–Lead Pinout (Top View)

Za

I0a

4

2

E

I1a

3

15

Zb

I0b

7

5

I1b

6

Zc

I0c

12

14

I1c

13

Zd

I0d

9

11

I1d

10

S

1

Figure 2. Logic Diagram

LVX

MC74LVX157

LOW–VOLTAGE CMOS

D SUFFIX

16–LEAD SOIC PACKAGE

CASE 751B–05

DT SUFFIX

16–LEAD TSSOP PACKAGE

CASE 948F–01

M SUFFIX

16–LEAD SOIC EIAJ PACKAGE

CASE 966–01

H

L

L

L

L

INPUTS

OUTPUT

E

L

L

H

L

H

Zn

TRUTH TABLE

PIN NAMES

Function

Source 0 Data Inputs

Source 1 Data Inputs

Enable Input

Select Input

Outputs

Pins

I0n

I1n

E

S

Zn

X

H

H

L

L

S

X

X

X

L

H

I0n

X

L

H

X

X

I1n

H = High Voltage Level; L = Low Voltage Level; X = High or Low

Voltage Level ; For ICC Reasons DO NOT FLOAT Inputs