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SN74S139A - 产品图解:
SN74S139A-双路 2 线路至 4 线路解码器/多路解复用器
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TI产品 - SN74S139A介绍
SN74S139A - 双路 2 线路至 4 线路解码器/多路解复用器

SN74S139A是TI公司的一款解码器/编码器/多路复用器产品,SN74S139A是双路 2 线路至 4 线路解码器/多路解复用器,本页介绍了SN74S139A的产品说明、应用、特性等,并给出了与SN74S139A相关的TI元器件型号供参考。

SN74S139A - 双路 2 线路至 4 线路解码器/多路解复用器 - 解码器/编码器/多路复用器 - 特殊逻辑 - TI公司(Texas Instruments,德州仪器)

产品描述

These Schottky-clamped TTL MSI 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 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. This means that the effective system delay introduced by the Schottky-clamped system decoder is negligible.

The circuit comprises two individual two-line to four-line decoders in a single package. The active-low enable input can be used as a data line in demultiplexing applications.

All of 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 to simplify system design. The SN54LS139A and SN54S139 are characterized for operation range of –55°C to 125°C. The SN74LS139A and SN74S139A are characterized for operation from 0°C to 70°C.

产品特性

  • Designed Specifically for High-Speed:
    • Memory Decoders
    • Data Transmission Systems
  • Two Fully Independent 2- to 4-Line Decoders/Demultiplexers
  • Schottky clamped for High Performance

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