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Product details

Parameters

Technology Family ALS Function Digital Demultiplexer Configuration 2:4 Channels (#) 2 Supply voltage (Min) (V) 4.5 Supply voltage (Max) (V) 5.5 Input type Bipolar Output type Push-Pull Data rate (Max) (Mbps) 150 ICC (Max) (uA) 13000 open-in-new Find other Encoders & decoders

Package | Pins | Size

CDIP (J) 16 135 mm² 19.65 x 6.92 LCCC (FK) 20 79 mm² 8.89 x 8.89 open-in-new Find other Encoders & decoders

Features

  • 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
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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.

 

 

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Technical documentation

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Type Title Date
* Datasheet Dual 2-Line To 4-Line Decoders/Demultiplexers datasheet (Rev. A) Dec. 01, 1994
* SMD SN54ALS139 SMD 5962-87683 Jun. 21, 2016
Selection guide Logic Guide (Rev. AB) Jun. 12, 2017
Application note Understanding and Interpreting Standard-Logic Data Sheets (Rev. C) Dec. 02, 2015
User guide LOGIC Pocket Data Book (Rev. B) Jan. 16, 2007
Application note Semiconductor Packing Material Electrostatic Discharge (ESD) Protection Jul. 08, 2004
More literature Logic Cross-Reference (Rev. A) Oct. 07, 2003
Application note TI IBIS File Creation, Validation, and Distribution Processes Aug. 29, 2002
Application note Bus-Interface Devices With Output-Damping Resistors Or Reduced-Drive Outputs (Rev. A) Aug. 01, 1997
Application note Designing With Logic (Rev. C) Jun. 01, 1997
Application note Input and Output Characteristics of Digital Integrated Circuits Oct. 01, 1996
Application note Live Insertion Oct. 01, 1996
Application note Advanced Schottky (ALS and AS) Logic Families Aug. 01, 1995

Design & development

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CAD/CAE symbols

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CDIP (J) 16 View options
LCCC (FK) 20 View options

Ordering & quality

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