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DM74S139 Datasheet Decoder/demultiplexer

Manufacturer: Fairchild (now onsemi)

Overview: DM74S138 • DM74S139 Decoder/Demultiplexer August 1986 Revised April 2000 DM74S138 • DM74S139 Decoder/Demultiplexer.

This datasheet includes multiple variants, all published together in a single manufacturer document.

General Description

These Schottky-clamped circuits are designed to be used in high-performance memory-decoding or data-routing applications, requiring very short propagation delay times.

In high-performance memory systems these decoders can be used to minimize the effects of system decoding.

When used with high-speed memories, the delay times of these decoders are usually less than the typical access time of the memory.

Key Features

  • s Designed specifically for high speed: Memory decoders Data transmission systems s DM74S138 3-to-8-line decoders incorporates 3 enable inputs to simplify cascading and/or data reception s DM74S139 contains two fully independent 2-to-4-line decoders/demultiplexers s Schottky clamped for high performance s Typical propagation delay time (3 levels of logic) DM74S138 8 ns DM74S139 7.5 ns s Typical power dissipation DM74S138 245 mW DM74S139 300 mW Ordering Code: Order Number DM74S138N DM74S139N P.

More Datasheets from Fairchild (now onsemi)

Part Number Description
DM74S133 13-Input NAND Gate
DM74S138 Decoder/Demultiplexer
DM74S10 Triple 3-Input NAND Gate
DM74S11 Triple 3-Input AND Gate
DM74S112 Dual Negative-Edge-Triggered Master-Slave J-K Flip-Flop
DM74S140 Dual 4-Input NAND 50ohm Line Driver
DM74S151 1-of-8 Data Selector/Multiplexer
DM74S153 Dual 1-of-4 Line Data Selector/Multiplexer
DM74S157 Quad 1 of 2 Line Data Selector/Multiplexer
DM74S158 Quad 1 of 2 Line Data Selector/Multiplexer

DM74S139 Distributor