1

Data sheet acquired from Harris Semiconductor

SCHS235

Features

• Buffered Inputs

• Typical Propagation Delay

• Exceeds 2kV ESD Protection MIL-STD-883, Method

3015

• SCR-Latchup-Resistant CMOS Process and Circuit

Design

• Speed of Bipolar FAST™/AS/S with Significantly

Reduced Power Consumption

• Balanced Propagation Delays

• AC Types Feature 1.5V to 5.5V Operation and

Balanced Noise Immunity at 30% of the Supply

•

±24mA Output Drive Current

- Fanout to 15 FAST™ ICs

- Drives 50

Ω Transmission Lines

Description

The CD74AC139 and CD74ACT139 are dual 2-to-4-line

decoders/demultiplexers that utilize the Harris Advanced

CMOS Logic technology. These devices contain two inde-

pendent 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.

Pinout

CD74AC139, CD74ACT139

(PDIP, SOIC)

TOP VIEW

Ordering Information

PART

NUMBER

TEMP.

PACKAGE

PKG.

NO.

CD74AC139E

-55 to 125

16 Ld PDIP

E16.3

CD74ACT139E

-55 to 125

16 Ld PDIP

E16.3

CD74AC139M96

-55 to 125

16 Ld SOIC

M16.15

CD74ACT139M

-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. Wafer and die for this part number is available which meets all elec-

trical specifications. Please contact your local sales office or Harris

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 1998

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

FAST™ is a Trademark of Fairchild Semiconductor.

Copyright

CD74AC139,

CD74ACT139

Dual 2-to-4-Line Decoder/Demultiplexer

File Number

1953.1

[ /Title

(CD74

AC139

,

CD74

ACT13

9)

/Sub-

ject

(Dual

2-to-4-

Line

Decod

er/Dem

ulti-

plexer)

/Autho

r ()

/Key-

words

(Har-

ris

Semi-

con-

ductor,

Advan

ced

CMOS

)

/Cre-

ator ()

/DOCI

NFO