74AC11139

DUAL 2-LINE DECODER/DEMULTIPLEXER

SCAS070B – JULY 1989 – REVISED APRIL 1996

1

POST OFFICE BOX 655303

Memory Decoders and Data Transmission

Systems

Cascading and/or Data Reception

Minimize High-Speed Switching Noise

CMOS) 1-

µm Process

125

°C

Small-Outline (D) and Thin Shrink

Small-Outline (PW) Packages, and

Standard Plastic 300-mil DIPs (N)

description

The 74AC11139 circuit is designed to be used in high-performance memory-decoding or data-routing

applications requiring very short propagation delay times. In high-performance memory systems, this decoder

can be used to minimize the effects of system decoding. When employed with high-speed memories utilizing

a fast enable circuit, the delay times of this decoder and the enable time of the memory are usually less than

the typical access time of the memory. This means that the effective system delay introduced by the decoder

is negligible.

The 74AC11139 is composed of two individual 2-line to 4-line decoders in a single package. The active-low

enable input can be used as a data line in demultiplexing applications. This decoder/demultiplexer features fully

buffered inputs, each of which represents only one normalized load to its driving circuit.

The 74AC11139 is characterized for operation from –40

°C to 85°C.

FUNCTION TABLE

ENABLE

INPUT

SELECT

INPUTS

OUTPUTS

G

A

B

Y0

Y1

Y2

Y3

H

X

X

H

H

H

H

L

L

LL

HH

H

L

H

LH

LH

H

L

L

HH

HL

H

L

H

H

H

H

H

L

Copyright

© 1996, Texas Instruments Incorporated

PRODUCTION DATA information is current as of publication date.

Products conform to specifications per the terms of Texas Instruments

standard warranty. Production processing does not necessarily include

testing of all parameters.

Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of

Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.

EPIC is a trademark of Texas Instruments Incorporated.

1

2

3

4

5

6

7

8

16

15

14

13

12

11

10

9

1Y1

1Y2

1Y3

GND

2Y0

2Y1

2Y2

2Y3

1Y0

1A

1B

1G

2G

2A

2B

D, N, OR PW PACKAGE

(TOP VIEW)