1

Data sheet acquired from Harris Semiconductor

SCHS148A

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

• Balanced Propagation Delay and Transition Times

• Significant Power Reduction Compared to LSTTL

Logic ICs

• HC Types

- 2V to 6V Operation

• HCT Types

- 4.5V to 5.5V Operation

- Direct LSTTL Input Logic Compatibility,

• Memory Decoding, Data Routing, Code Conversion

Description

The CD74HC139 and CD74HCT139 devices 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.

Pinout

CD74HC139, CD74HCT139

(PDIP, SOIC)

TOP VIEW

Ordering Information

PART NUMBER

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

CD74HCT139M

-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 customer service for ordering

information.

14

15

16

9

13

12

11

10

1

2

3

4

5

7

6

8

1E

1A0

1A1

1Y0

1Y1

1Y2

GND

1Y3

2A0

2A1

2Y0

2Y1

2Y2

2Y3

2E

September 1997 - Revised May 1999

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

Copyright

CD74HC139,

CD74HCT139

High-Speed CMOS Logic

Dual 2-to-4 Line Decoder/Demultiplexer

[ /Title

(CD74

HC139

,

CD74

HCT13

9)

/Sub-

ject

(High

Speed

CMOS

Logic

Dual

2-to-4

Line

Decod