SN74AHC138 - 3 线至 8 线解码器/多路解复用器

SN74AHC138是TI德州仪器公司的一款解码器/编码器/多路复用器产品，SN74AHC138是3 线至 8 线解码器/多路解复用器，本站介绍了SN74AHC138的封装应用图解、特点和优点、功能等，并给出了与SN74AHC138相关的TI元器件型号供参考。

SN74AHC138 - 3 线至 8 线解码器/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 ’AHC138 decoders/demultiplexers are designed for high-performance memory-decoding and data-routing applications that require 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 decoders 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.

产品特性

Operating Range 2-V to 5.5-V VCC
Designed Specifically for High-Speed Memory Decoders and Data-Transmission Systems
Incorporate Three Enable Inputs to Simplify Cascading and/or Data Reception
Latch-Up Performance Exceeds 250 mA Per JESD 17
ESD Protection Exceeds JESD 22
- 2000-V Human-Body Model (A114-A)
- 200-V Machine Model (A115-A)
- 1000-V Charged-Device Model (C101)

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