MC74AC139D View Datasheet(PDF) - Motorola => Freescale

Part Name

Description

Manufacturer

MC74AC139D

Dual 1-of-4 decoder,demultiplexer

Motorola => Freescale 

MC74AC139

MC74ACT139

Dual 1ĆofĆ4 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.

• Multifunction Capability

• Two Completely Independent 1-of-4 Decoders

• Active LOW Mutually Exclusive Outputs

• Outputs Source/Sink 24 mA

• ′ACT139 Has TTL Compatible Inputs

VCC Eb A0b A1b O0b O1b O2b O3b

16 15 14 13 12 11 10 9

DUAL 1-OF-4

DECODER/DEMULTIPLEXER

N SUFFIX

CASE 648-08

PLASTIC

12345678

Ea A0a A1a O0a O1a O2a O3a GND

TRUTH TABLE

Inputs

Outputs

E A0 A1 O0 O1 O2 O3

HXX H H H

H

LLL

L

H

H

H

LHL H L H

H

LLH H H L

H

LHH H H H

L

H = HIGH Voltage Level

L = LOW Voltage Level

X = Immaterial

PIN NAMES

A0, A1

E

O0–O3

Address Inputs

Enable Inputs

Outputs

D SUFFIX

CASE 751B-05

PLASTIC

LOGIC SYMBOL

E A0 A1

DECODER a

O0 O1 O2 O3

E A0 A1

DECODER b

O0 O1 O2 O3

FACT DATA

5-1

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