SN74ALS139 - 双路 2 线路至 4 线路解码器/多路解复用器

SN74ALS139是TI德州仪器公司的一款解码器/编码器/多路复用器产品，SN74ALS139是双路 2 线路至 4 线路解码器/多路解复用器，本站介绍了SN74ALS139的封装应用图解、特点和优点、功能等，并给出了与SN74ALS139相关的TI元器件型号供参考。

SN74ALS139 - 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 - 德州仪器

产品描述

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.

产品特性

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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