IN74HC139A 查看數據表（PDF） - Integral Corp.

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IN74HC139A

Dual 1-of-4 Decoder/Demultiplexer

Integral Corp. 

TECHNICAL DATA

Dual 1-of-4 Decoder/Demultiplexer

High-Performance Silicon-Gate CMOS

IN74HC139A

The IN74HC139A is identical in pinout to the LS/ALS139. The

device inputs are compatible with standard CMOS outputs; with pullup

resistors, they are compatible with LS/ALSTTL outputs.

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.

• Outputs Directly Interface to CMOS, NMOS, and TTL

• Operating Voltage Range: 2.0 to 6.0 V

• Low Input Current: 1.0 µA

• High Noise Immunity Characteristic of CMOS Devices

ORDERING INFORMATION

IN74HC139AN Plastic

IN74HC139AD 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 X HH H H

L

L L LH H H

L

L HHL H H

L

H L HH L H

L

H H HH H L

X = don’t care

151

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