SN74F138 - 3 线路到 8 线路解码器/多路解复用器

SN74F138是TI德州仪器公司的一款解码器/编码器/多路复用器产品，SN74F138是3 线路到 8 线路解码器/多路解复用器，本站介绍了SN74F138的封装应用图解、特点和优点、功能等，并给出了与SN74F138相关的TI元器件型号供参考。

SN74F138 - 3 线路到 8 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 ´F138 is 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 this decoder 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 decoder is negligible.

The conditions at the binary-select inputs and the three enable inputs select one of eight output lines. Two active-low and one active-high enable inputs reduce the need for external gates or inverters when expanding. A 24-line decoder can be implemented without external inverters and a 32-line decoder requires only one inverter. An enable input can be used as a data input for demultiplexing applications.

The SN54F138 is characterized for operation over the full military temperature range of -55°C to 125°C. The SN74F138 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
Incorporates Three Enable Inputs to Simplify Cascading and/or Data Reception
Package Options Include Plastic Small-Outline Packages, Ceramic Chip Carriers, and Standard Plastic and Ceramic 300-mil DIPs

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