© Semiconductor Components Industries, LLC, 2015

January, 2015 − Rev. 8

1

Publication Order Number:

MC74AC139/D

MC74AC139, MC74ACT139

Dual 1-of-4

Decoder/Demultiplexer

The MC74AC139/74ACT139 is a high−speed, dual 1−of−4

decoder/demultiplexer. The device has two independent decoders,

each accepting two inputs and providing four mutually−exclusive

active−LOW outputs. Each decoder has an active−LOW Enable input

which can be used as a data input for a 4−output demultiplexer. Each

half of the MC74AC139/74ACT139 can be used as a function

generator providing four minterms of two variables.

Features

• Multifunctional Capability

• Two Completely Independent 1−of−4 Decoders

• Active LOW Mutually Exclusive Outputs

• Outputs Source/Sink 24 mA

• ′ACT139 Has TTL Compatible Inputs

• These are Pb−Free Devices

15

16

14

13

12

11

10

2

1

3

4

567

VCC

9

8

Eb

A0b

A1b

Ea

GND

O0b

O1b

O2b

O3b

A0a

A1a

O0a

O1a

O2a

O3a

Figure 1. Pinout: 16−Lead Packages Conductors

(Top View)

PIN ASSIGNMENT

PIN

FUNCTION

A0, A1

Address Inputs

E

Enable Inputs

O0−O3

Outputs

TRUTH TABLE

Inputs

Outputs

E

A0

A1

O0

O1

O2

O3

H

X

X

H

H

H

H

L

L

L

L

H

H

H

L

H

L

H

L

H

H

L

L

H

H

H

L

H

L

H

H

H

H

H

L

H = HIGH Voltage Level

L = LOW Voltage Level

X = Immaterial

www.onsemi.com

See detailed ordering and shipping information in the package

dimensions section on page 6 of this data sheet.

ORDERING INFORMATION

SOIC−16

D SUFFIX

CASE 751B

TSSOP−16

DT SUFFIX

CASE 948F

1

16

1

16

MARKING

DIAGRAMS

xxx

= AC or ACT

A

= Assembly Location

WL or L

= Wafer Lot

Y

= Year

WW or W = Work Week

G or

G

= Pb−Free Package

1

16

xxx139G

AWLYWW

xxx

139

ALYW

G

G

1

16

(Note: Microdot may be in either location)