描述 Description

The MC74AC139/74ACT139 is a high-speed, dual 1-of-4 decoder/demultiplexer The device has two independent decoders, each accepting two inputs and providing four mutually-exclusive active-LOW outputs. Each decoder has an active-LOWEnable input which can be used as a data input for a 4-output demultiplexer. Eachhalf of the MC74AC139/74ACT139 can be used as a function generator providingfour minterms of two variables.

特性 Features

? Multifunction Capability
? Two Completely Independent 1-of-4 Decoders
? Active LOW Mutually Exclusive Outputs
? Outputs Source/Sink 24 mA
? ACT139 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.

簡介

MC74ACT139屬于集成電路（IC）的信號(hào)開關(guān)多路復(fù)用器解碼器。由制造生產(chǎn)的MC74ACT139信號(hào)開關(guān)，多路復(fù)用器，解碼器邏輯型信號(hào)開關(guān)、多路復(fù)用器和編碼器 IC 可用于對以數(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)的無窮變化量。