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SL74HCT139

Dual 1-of-4 Decoder/Demultiplexer High-Performance Silicon-Gate CMOS

System Logic Semiconductor 

SL74HCT139

Dual 1-of-4 Decoder/Demultiplexer

High-Performance Silicon-Gate CMOS

The SL74HCT139A is identical in pinout to the LS/ALS139. The

SL74HCT139A may be used as a level converter for interfacing TTL or

NMOS outputs to High Speed CMOS inputs.

This device consists of two independent 1-of-4 decoders, each of

which decodes a two-bit Address to one-of-four active-low outputs.

Active-low Selects are provided to facilitate the demultiplexing and

cascading functions. The demultiplexing function is accomplished by

using the Address inputs to select the desired device output, and

utilizing the Select as a data input.

• TTL/NMOS Compatible Input Levels

• Outputs Directly Interface to CMOS, NMOS, and TTL

• Operating Voltage Range: 4.5 to 5.5 V

• Low Input Current: 1.0 µA

ORDERING INFORMATION

SL74HCT139N Plastic

SL74HCT139D SOIC

TA = -55° to 125° C for all packages

LOGIC DIAGRAM

PIN ASSIGNMENT

PIN 16 =VCC

PIN 8 = GND

FUNCTION TABLE

Inputs

Outputs

Select A1 A0 Y0 Y1 Y2 Y3

H

X XHH H H

L

L L LH H H

L

L HHL HH

L

H L HH L H

L

H HHH H L

X = don’t care

SLS

System Logic

Semiconductor

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