描述 Description

The MC74AC138/74ACT138 is a high-speed 1-of-8 decoder/demultiplexer. Thisdevice is ideally suited for high-speed bipolar memory chip select address decoding.The multiple input enables allow parallel expansion to a 1-of-24 decoder using justthree MC74AC138/74ACT138 devices or a 1-of-32 decoder using four MC74AC138/ 74ACT138 devices and one inverter.

特性 Features

? Demultiplexing Capability
? Multiple Input Enable for Easy Expansion
? Active LOW Mutually Exclusive Outputs
? Outputs Source/Sink 24 mA
? ACT138 Has TTL Compatible Inputs
? These devices are available in Pb-free package(s). Specifications herein apply to both standard and Pb-free devices. Please see our website at www.onsemi.com for specific Pb-free orderable part numbers, or contact your local ON Semiconductor sales office or representative.

簡(jiǎn)介

MC74ACT138屬于集成電路（IC）的信號(hào)開(kāi)關(guān)多路復(fù)用器解碼器。由制造生產(chǎn)的MC74ACT138信號(hào)開(kāi)關(guān)，多路復(fù)用器，解碼器邏輯型信號(hào)開(kāi)關(guān)、多路復(fù)用器和編碼器 IC 可用于對(duì)以數(shù)字格式表示數(shù)據(jù)的電信號(hào)進(jìn)行路由和選擇。這些器件與設(shè)計(jì)用于模擬信號(hào)的類(lèi)似產(chǎn)品有所不同，它們保留的信息表示為兩個(gè)電狀態(tài)之一，而不是兩個(gè)外部界限內(nèi)的無(wú)窮變化量。