© Semiconductor Components Industries, LLC, 2014

August, 2014 − Rev. 12

1

Publication Order Number:

MC74HC157A/D

MC74HC157A

Quad 2-Input Data

Selectors/Multiplexers

High−Performance Silicon−Gate CMOS

The MC74HC157A is identical in pinout to the LS157. The device

inputs are compatible with standard CMOS outputs; with pullup

resistors, they are compatible with LSTTL outputs.

This device routes 2 nibbles (A or B) to a single port (Y) as

determined by the Select input. The data is presented at the outputs in

noninverted form. A high level on the Output Enable input sets all four

Y outputs to a low level.

Features

No. 7A

Unique Site and Control Change Requirements; AEC−Q100

Qualified and PPAP Capable

Compliant

2

5

11

14

3

6

10

13

4

7

9

12

1

15

A0

A1

A2

A3

B0

B1

B2

B3

Y0

Y1

Y2

Y3

SELECT

OUTPUT

ENABLE

DATA

OUTPUTS

NIBBLE

A INPUTS

NIBBLE

B INPUTS

PIN 8 = GND

Figure 1. Logic Diagram

http://onsemi.com

See detailed ordering and shipping information in the package

dimensions section on page 5 of this data sheet.

ORDERING INFORMATION

MARKING DIAGRAMS

SOIC−16

D SUFFIX

CASE 751B

TSSOP−16

DT SUFFIX

CASE 948F

1

16

HC157AG

AWLYWW

HC

157A

ALYW

G

G

1

16

A

= Assembly Location

L, WL

= Wafer Lot

Y, YY

= Year

W, WW

= Work Week

G or

G

= Pb−Free Package

(Note: Microdot may be in either location)

SOIC−16

TSSOP−16

PIN ASSIGNMENT

13

14

15

16

9

10

11

12

5

4

3

2

1

8

7

6

SELECT

Y0

B0

A0

Y1

B1

A1

GND

Y3

B3

A3

OUTPUT

ENABLE

B2

A2

Y2

FUNCTION TABLE

Inputs

Output

Outputs

Enable

Select

Y0 − Y3

X = don’t care

A0−A3, B0−B3 = the levels of

the respective Data−Word

Inputs.

H

L

L

X

L

H

L

A0 − A3

B0 − B3