MM74HC242

更新时间： 2024-11-24 23:02:43

品牌	Logo	应用领域
美国国家半导体 - NSC		/
页数	文件大小	规格书
6页	128K
描述
Inverting Quad TRI-STATE Transceiver

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数据手册

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MM74HC242 数据手册

January 1988

MM54HC242/MM74HC242

Inverting Quad TRI-STATE Transceiver

MM54HC243/MM74HC243 Quad TRI-STATE Transceiver

General Description

These TRI-STATE bidirectional inverting and non-inverting

buffers utilize advanced silicon-gate CMOS technology and

are intended for two-way asynchronous communication be-

tween data buses. They have high drive current outputs

which enable high speed operation when driving large bus

capacitances. These circuits possess the low power dissi-

pation and high noise immunity associated with CMOS cir-

cuits, but speeds comparable to low power Schottky TTL

circuits. They can also drive 15 LS-TTL loads.

GAB enables the B outputs. This device does not have

Schmitt trigger inputs.

All inputs are protected from damage due to static dis-

and ground.

charge by diodes to V

Features

Typical propagation delay: 12 ns

TRI-STATE outputs

Two way asynchronous communication

High output current: 6 mA (74HC)

Wide power supply range: 2–6V

Low quiescent supply current: 80 mA (74HC)

The MM54HC243/MM74HC243 is a non-inverting buffer

and the MM54HC242/MM74HC242 is an inverting buffer.

Each device has one active high enable (GBA), and one

active low enable (GAB). GBA enables the A outputs and

Connection Diagrams

Dual-In-Line Package

TL/L/5019–1

Top View

Order Number MM54HC242 or MM74HC242

TL/L/5019–2

Top View

Order Number MM54HC243 or MM74HC243

Truth Tables

’HC242

’HC243

Control Inputs

Data Port Status

Control Inputs

Data Port Status

GAB

GBA

GAB

GBA

OUTPUT

Isolated

Input

OUTPUT

Isolated

Input

Isolated

OUTPUT

Isolated

OUTPUT

TRI-STATEÉ is a registered trademark of National Semiconductor Corp.

1995 National Semiconductor Corporation

TL/L/5019

RRD-B30M115/Printed in U. S. A.

12 3 4 5 6

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与MM74HC242相关器件

型号	品牌	获取价格	描述	数据表
MM74HC242J	NSC	获取价格	Inverting Quad TRI-STATE Transceiver
MM74HC242J/A+	NSC	获取价格	IC,BUS TRANSCEIVER,SINGLE,4-BIT,HC-CMOS,DIP,14PIN,CERAMIC
MM74HC242MX	TI	获取价格	HC/UH SERIES, 4-BIT TRANSCEIVER, INVERTED OUTPUT, PDSO14, PLASTIC, SO-14
MM74HC242N	NSC	获取价格	Inverting Quad TRI-STATE Transceiver
MM74HC242N/A+	TI	获取价格	IC,BUS TRANSCEIVER,SINGLE,4-BIT,HC-CMOS,DIP,14PIN,PLASTIC
MM74HC242N/B+	TI	获取价格	IC,BUS TRANSCEIVER,SINGLE,4-BIT,HC-CMOS,DIP,14PIN,PLASTIC
MM74HC243	NSC	获取价格	Inverting Quad TRI-STATE Transceiver
MM74HC243J	NSC	获取价格	Inverting Quad TRI-STATE Transceiver
MM74HC243M/A+	NSC	获取价格	IC,BUS TRANSCEIVER,SINGLE,4-BIT,HC-CMOS,SOP,14PIN,PLASTIC
MM74HC243MX	TI	获取价格	HC/UH SERIES, 4-BIT TRANSCEIVER, TRUE OUTPUT, PDSO14, PLASTIC, SO-14