Datasheet

ManualsBrandsTEXAS INSTRUMENTS ManualsLogic ICsLogic IC - Demultiplexer, decoder Decoder/demultiplexer Single supply SOIC 16 N

SN54ALS139, SN74ALS139

DUAL 2-LINE TO 4-LINE DECODERS/DEMULTIPLEXERS

SDAS204A – APRIL 1982 – REVISED DECEMBER 1994

POST OFFICE BOX 655303 • DALLAS, TEXAS 75265

• Designed Specifically for High-Speed

Memory Decoders and Data Transmission

Systems

• Incorporate Two Enable Inputs to Simplify

Cascading and/or Data Reception

• Package Options Include Plastic

Small-Outline (D) Packages, Ceramic Chip

Carriers (FK), and Standard Plastic (N) and

Ceramic (J) 300-mil DIPs

description

The ′ALS139 are dual 2-line to 4-line

decoders/demultiplexers designed for use in

high-performance memory-decoding or data-

routing applications requiring very short

propagation delay times. In high-performance

memory systems, these devices can minimize the

effects of system decoding. When employed with

high-speed memories utilizing a fast-enable

circuit, the delay times of these decoders and the

enable time of the memory are usually less than

the typical access time of the memory. Therefore,

the effective system delay introduced by the

Schottky-clamped system decoder is negligible.

The ′ALS139 comprise two individual 2-line to

4-line decoders in a single package. The

active-low enable (G

) input can be used as a data

line in demultiplexing applications. These

decoders/demultiplexers feature fully buffered inputs, each of which represents only one normalized load to its

driving circuit. All inputs are clamped with high-performance Schottky diodes to suppress line ringing and

simplify system design.

The SN54ALS139 is characterized for operation over the full military temperature range of –55°C to 125°C. The

SN74ALS139 is characterized for operation from 0°C to 70°C.

FUNCTION TABLE

INPUTS

OUTPUTS

ENABLE

SELECT

OUTPUTS

ENABLE

B A Y0 Y1 Y2 Y3

H X X H H H H

L L LLHHH

L LHHLHH

L HLHHLH

L HHHHHL

SN54ALS139 ...J PACKAGE

SN74ALS139 ...D OR N PACKAGE

(TOP VIEW)

3 2 1 20 19

910111213

2Y0

2Y1

1Y0

1Y1

1Y2

SN54ALS139 . . . FK PACKAGE

(TOP VIEW)

2Y3

2Y2

1Y3

GND

NC – No internal connection

1Y0

1Y1

1Y2

1Y3

GND

2Y0

2Y1

2Y2

2Y3

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.

Summary of content (17 pages)

PAGE 1
SN54ALS139, SN74ALS139 DUAL 2-LINE TO 4-LINE DECODERS/DEMULTIPLEXERS SDAS204A – APRIL 1982 – REVISED DECEMBER 1994 • • • SN54ALS139 . . . J PACKAGE SN74ALS139 . . .
PAGE 2
SN54ALS139, SN74ALS139 DUAL 2-LINE TO 4-LINE DECODERS/DEMULTIPLEXERS SDAS204A – APRIL 1982 – REVISED DECEMBER 1994 logic symbols (alternatives)† 1A 1B 1G X/Y 2 4 0 1 3 5 1 1 EN 6 2 7 3 12 2A 2B 2G 14 11 13 10 15 9 1Y0 1A 1Y1 1B 1Y2 1G 2 3 0 1 DMUX 0 G 3 1 3 2Y3 4 5 6 7 12 2Y0 2Y2 1 2 1Y3 2Y1 0 2A 2B 2G 14 11 13 10 15 9 † These symbols are in accordance with ANSI/IEEE Std 91-1984 and IEC Publication 617-12. Pin numbers shown are for the D, J, and N packages.
PAGE 3
SN54ALS139, SN74ALS139 DUAL 2-LINE TO 4-LINE DECODERS/DEMULTIPLEXERS SDAS204A – APRIL 1982 – REVISED DECEMBER 1994 absolute maximum ratings over operating free-air temperature range (unless otherwise noted)† Supply voltage, VCC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 V Input voltage, VI . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
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SN54ALS139, SN74ALS139 DUAL 2-LINE TO 4-LINE DECODERS/DEMULTIPLEXERS SDAS204A – APRIL 1982 – REVISED DECEMBER 1994 PARAMETER MEASUREMENT INFORMATION SERIES 54ALS/74ALS AND 54AS/74AS DEVICES 7V RL = R1 = R2 VCC S1 RL R1 Test Point From Output Under Test CL (see Note A) From Output Under Test RL Test Point From Output Under Test CL (see Note A) CL (see Note A) LOAD CIRCUIT FOR BI-STATE TOTEM-POLE OUTPUTS LOAD CIRCUIT FOR OPEN-COLLECTOR OUTPUTS 3.
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PACKAGE OPTION ADDENDUM www.ti.
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PACKAGE OPTION ADDENDUM www.ti.
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PACKAGE OPTION ADDENDUM www.ti.
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PACKAGE MATERIALS INFORMATION www.ti.com 14-Jul-2012 TAPE AND REEL INFORMATION *All dimensions are nominal Device Package Package Pins Type Drawing SPQ Reel Reel A0 Diameter Width (mm) (mm) W1 (mm) B0 (mm) K0 (mm) P1 (mm) W Pin1 (mm) Quadrant SN74ALS139DR SOIC D 16 2500 330.0 16.4 6.5 10.3 2.1 8.0 16.0 Q1 SN74ALS139NSR SO NS 16 2000 330.0 16.4 8.2 10.5 2.5 12.0 16.
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PACKAGE MATERIALS INFORMATION www.ti.com 14-Jul-2012 *All dimensions are nominal Device Package Type Package Drawing Pins SPQ Length (mm) Width (mm) Height (mm) SN74ALS139DR SN74ALS139NSR SOIC D 16 2500 333.2 345.9 28.6 SO NS 16 2000 367.0 367.0 38.
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