MC74HC138A

http://onsemi.com

2

7

Y6

Y5

Y4

Y3

Y2

Y1

Y0

Y7

9

10

11

12

13

14

15

3

2

1

CS1

CS2

A0

A1

A2

ACTIVE-LOW

OUTPUTS

ADDRESS

INPUTS

CS3

CHIP-

SELECT

INPUTS

5

4

6

PIN 8 = GND

Inputs

Outputs

CS1CS2 CS3 A2 A1 A0 Y0 Y1 Y2 Y3 Y4 Y5 Y6 Y7

X

X

H

X X X

HHH

HHHH

H

X

H

X

X X X

HHH

HHHH

H

L

X

X

X X X

HHH

HHHH

H

H

L

L

L

L

L

L

H

H

HHHH

H

H

L

L

L

L H

H

L

H

HHHH

H

H

L

L

L H L

HH

L

HHHH

H

H

L

L

L H H

HHH

L

HHH

H

H

L

L

H L

L

HHH

H

L

HH

H

H

L

L

H L H

HHH

HH

L

H

H

H

L

L

H H L

HHH

HHH

L

H

H

L

L

H H H

HHH

HHHH

L

FUNCTION TABLE

H = high level (steady state); L = low level (steady state); X = don’t care

Figure 1. Pin Assignment

13

14

15

16

9

10

11

12

5

4

3

2

1

8

7

6

A0

CS2

A2

A1

Y7

CS1

CS3

GND

Y3

Y2

Y1

Y0

Y5

Y4

Y6

Figure 2. Logic Diagram

ORDERING INFORMATION

Device

Package

MC74HC138ANG

PDIP−16

(Pb−Free)

500 Units / Rail

MC74HC138ADG

SOIC−16

(Pb−Free)

48 Units / Rail

MC74HC138ADR2G

SOIC−16

(Pb−Free)

2500 / Tape & Reel

MC74HC138ADTR2G

TSSOP−16

(Pb−Free)

2500 / Tape & Reel

NLV74HC138ADR2G*

SOIC−16

(Pb−Free)

2500 / Tape & Reel

NLV74HC138ADTR2G*

TSSOP−16

(Pb−Free)

2500 / Tape & Reel

†For information on tape and reel specifications, including part orientation and tape sizes, please refer to our Tape and Reel Packaging

Specifications Brochure, BRD8011/D.

*NLV Prefix for Automotive and Other Applications Requiring Unique Site and Control Change Requirements; AEC−Q100 Qualified and PPAP

Capable