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CD74HC139M

High Speed CMOS Logic Dual 2-to-4 Line Decoder/Demultiplexer

Harris Semiconductor 

SEMICONDUCTOR

September 1997

CD74HC139,

CD74HCT139

High Speed CMOS Logic

Dual 2-to-4 Line Decoder/Demultiplexer

Features

• Multifunction Capability

- Binary to 1 of 4 Decoders or 1 to 4 Line

Demultiplexer

• Active Low Mutually Exclusive Outputs

• Fanout (Over Temperature Range)

- Standard Outputs . . . . . . . . . . . . . . . 10 LSTTL Loads

- Bus Driver Outputs . . . . . . . . . . . . . 15 LSTTL Loads

• Wide Operating Temperature Range . . . -55oC to 125oC

• Balanced Propagation Delay and Transition Times

• Significant Power Reduction Compared to LSTTL

Logic ICs

• HC Types

- 2V to 6V Operation

- High Noise Immunity: NIL = 30%, NIH = 30%of VCC at

VCC = 5V

• HCT Types

- 4.5V to 5.5V Operation

- Direct LSTTL Input Logic Compatibility,

VIL= 0.8V (Max), VIH = 2V (Min)

- CMOS Input Compatibility, Il ≤ 1µA at VOL, VOH

• Memory Decoding, Data Routing, Code Conversion

Description

The Harris CD74HC139, CD74HCT139 contain two

independent binary to one of four decoders each with a

single active low enable input (1E or 2E). Data on the select

inputs (1A0 and 1A1 or 2A0 and 2A1) cause one of the four

normally high outputs to go low.

If the enable input is high all four outputs remain high. For

demultiplexer operation the enable input is the data input.

The enable input also functions as a chip select when these

devices are cascaded. This device is functionally the same

as the CD4556B and is pin compatible with it.

The outputs of these devices can drive 10 low power

Schottky TTL equivalent loads. The 74HCT logic family is

functionally as well as pin equivalent to the 74LS logic family.

Ordering Information

PART NUMBER TEMP. RANGE (oC) PACKAGE

PKG.

NO.

CD74HC139E

-55 to 125

16 Ld PDIP E16.3

CD74HCT139E

-55 to 125

16 Ld PDIP E16.3

CD74HC139M

-55 to 125

16 Ld SOIC M16.15

NOTES:

1. When ordering, use the entire part number. Add the suffix 96 to

obtain the variant in the tape and reel.

2. Die is available which meets all electrical specifications. Please

contact your local sales office or Harris customer service for

ordering information.

Pinout

CD74HC139, CD74HCT139

(PDIP, SOIC)

TOP VIEW

1E 1

1A0 2

1A1 3

1Y0 4

1Y1 5

1Y2 6

1Y3 7

GND 8

16 VCC

15 2E

14 2A0

13 2A1

12 2Y0

11 2Y1

10 2Y2

9 2Y3

CAUTION: These devices are sensitive to electrostatic discharge. Users should follow proper IC Handling Procedures.

Copyright © Harris Corporation 1997

1

File Number 1545.1

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