描述 Description

The MC74HC238A is identical in pinout to the LS238. The device inputs are compatible with standard CMOS outputs; with pullup resistors, they are compatible with LSTTL outputs. The HC238A decodes a three bit Address to one of eight active high outputs. This device features three Chip Select inputs, two active low and one active high to facilitate the demultiplexing, cascading, and chip selecting functions. The demultiplexing function is accomplished by using the Address inputs to select the desired device output; one of the Chip Selects is used as a data input while the other Chip Selects are held in their active states.

特性 Features

? Output Drive Capability: 10 LSTTL Loads
? Outputs Directly Interface to CMOS, NMOS and TTL
? Operating Voltage Range: 2.0 to 6.0 V
? Low Input Current: 1.0 μA
? High Noise Immunity Characteristic of CMOS Devices
? In Compliance with the Requirements Defined by JEDECStandard No. 7A
? Chip Complexity: 100 FETs or 29 Equivalent Gates
? These are PbFree Devices

應(yīng)用 Application

? Industrial

簡介

MC74HC238A屬于集成電路（IC）的信號開關(guān)多路復(fù)用器解碼器。由制造生產(chǎn)的MC74HC238A信號開關(guān)，多路復(fù)用器，解碼器邏輯型信號開關(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)的電信號進(jìn)行路由和選擇。這些器件與設(shè)計(jì)用于模擬信號的類似產(chǎn)品有所不同，它們保留的信息表示為兩個電狀態(tài)之一，而不是兩個外部界限內(nèi)的無窮變化量。