CD74ACT238E集成电路（IC）的信号开关多路复用器解码器规格书PDF中文资料

CD74ACT238E属于集成电路（IC）的信号开关多路复用器解码器。由德州仪器制造生产的CD74ACT238E信号开关，多路复用器，解码器逻辑型信号开关、多路复用器和编码器 IC 可用于对以数字格式表示数据的电信号进行路由和选择。这些器件与设计用于模拟信号的类似产品有所不同，它们保留的信息表示为两个电状态之一，而不是两个外部界限内的无穷变化量。

Inputs Are TTL-Voltage Compatible

Speed of Bipolar F, AS, and S, With

Significantly Reduced Power Consumption

Designed Specifically for High-Speed

Memory Decoders and Data-Transmission

Systems

Incorporates Three Enable Inputs to

Simplify Cascading and/or Data Reception

Balanced Propagation Delays

±24-mA Output Drive Current

– Fanout to 15 F Devices

SCR-Latchup-Resistant CMOS Process and

Circuit Design

Exceeds 2-kV ESD Protection Per

MIL-STD-883, Method 3015

description/ordering information

The CD74ACT238 decoder/demultiplexer is designed for high-performance memory-decoding and data-routing

applications that require very short propagation-delay times. In high-performance memory systems, this

decoder 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 usually are 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 (see Application

Information).