描述 Description

General Description
This Data Selector/Multiplexer contains full on-chip decoding to select one-of-eight data sources as a result of a unique three-bit binary code at the Select inputs. Two complementary outputs provide both inverting and non-inverting buffer operation. An Output Control input is provided which, when at the high level, places both outputs in the high impedance OFF-State. In order to prevent bus access conflicts, output disable times are shorter than output enable times. The Select input buffers incorporate internal overlap features to ensure that select input changes do not cause invalid output transients.

特性 Features

■ Advanced oxide-isolated, ion-implanted Schottky TTL process
■ Switching performance is guaranteed over full temperature and VCC supply range
■ Pin and functional compatible with LS family counterpart
■ Improved output transient handling capability
■ Output control circuitry incorporates power-up 3-STATE feature

簡介

DM74ALS251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DM74ALS251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(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。