MC74AC257数据手册集成电路（IC）的信号开关多路复用器解码器规格书PDF

描述 Description

The MC74AC257/74ACT257 is a quad 2-input multiplexer with 3-state outputs.Four bits of data from two sources can be selected using a Common Data Selectinput. The four outputs present the selected data in true (noninverted) form. Theoutputs may be switched to a high impedance state by placing a logic HIGH onthe common Output Enable (OE) input, allowing the outputs to interface directlywith bus-oriented systems.

特性 Features

• Multiplexer Expansion by Tying Outputs Together
• Noninverting 3-State Outputs
• Outputs Source/Sink 24 mA
• ACT257 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.

简介

MC74AC257属于集成电路（IC）的信号开关多路复用器解码器。由制造生产的MC74AC257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。