MM54HCT643 datasheet(1/4 Pages) NSC

tên linh kiện	MM54HCT643

Giải thích chi tiết về linh kiện	Inverting Octal TRI-STATE Transceiver

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nhà sản xuất	NSC [National Semiconductor (TI)]

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TLF5370

February 1988

MM54HCT640MM74HCT640

Inverting Octal TRI-STATE

Transceiver

MM54HCT643MM74HCT643

True-Inverting Octal TRI-STATE Transceiver

General Description

These TRI-STATE bi-directional transceivers utilize advanced

silicon-gate CMOS technology and are intended for two-way

asynchronous communication between data buses They

have high drive current outputs which enable high speed

operation even when driving large bus capacitances These

circuits possess the low power consumption of CMOS cir-

cuitry yet have speeds comparable to low power Schottky

TTL circuits

All devices are TTL input compatible and can drive up to 15

LS-TTL loads and all inputs are protected from damage due

to static discharge by diodes to VCC and ground

Both the MM54HCT640MM74HCT640 and the

MM54HCT643 MM74HCT643 have one active low enable

input (G) and a direction control (DIR) When the DIR input

is high data flows from the A inputs to the B outputs When

DIR is low data flows from B to A The MM54HCT640

MM74HCT640 transfers inverted data from one bus to the

other The MM54HCT643MM74HCT643 transfers inverted

data from the A bus to the B bus and non-inverted data from

the B bus to the A bus

MM54HCTMM74HCT devices are intended to interface be-

tween TTL and NMOS components and standard CMOS

devices These parts are also plug-in replacements for LS-

TTL devices and can be used to reduce power consumption

in existing designs

Features

Y

TTL input compatible

Y

Octal TRI-STATE outputs for mP bus applications

6 mA typical

Y

High speed 16 ns typical propagation delay

Y

Low power 80 mA maximum (74HCT)

Connection Diagram

Dual-In-Line Packages

TLF5370 – 1

Top View

Order Number MM54HCT640 or MM74HCT640

TLF5370 – 2

Top View

Order Number MM54HCT643 or MM74HCT643

Truth Table

Control

Operation

Inputs

G

DIR

640

643

LL

B data to A bus

LH

A data to B bus

H

X

Isolation

Hehigh level Lelow level Xeirrelevant

TRI-STATE

is a registered trademark of National Semiconductor Corp

C1995 National Semiconductor Corporation

RRD-B30M105Printed in U S A

Số phần tương tự - MM54HCT643

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National Semiconductor ...	MM54HCT688	109Kb / 4P	8-Bit Magnitude Comparator (Equality Detector)

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Mô tả tương tự - MM54HCT643

nhà sản xuất	tên linh kiện	bảng dữ liệu	Giải thích chi tiết về linh kiện
National Semiconductor ...	SCAN18245T	193Kb / 16P	Non-Inverting Transceiver with TRI-STATE Outputs
NXP Semiconductors	74ABT648	120Kb / 14P	Octal transceiver/register, inverting 3-State 1998 Jun 08
NXP Semiconductors	74HC640	47Kb / 6P	Octal bus transceiver; 3-state; inverting March 1988
National Semiconductor ...	74LS245	139Kb / 6P	TRI-STATE Octal Bus Transceiver
	MM74HC245A	127Kb / 6P	Octal TRI-STATE Transceiver
	MM74HC640	145Kb / 6P	Inverting Octal TRI-STATE Transceiver
	MM74HC242	134Kb / 6P	Inverting Quad TRI-STATE Transceiver
	MM54HC620	124Kb / 4P	Octal TRI-STATE Transceiver
IK Semicon Co., Ltd	IN74LV640	257Kb / 5P	Octal 3-State Inverting Bus Transceiver
Motorola, Inc	MC74F544	86Kb / 4P	OCTAL REGISTERED TRANSCEIVER, INVERTING, 3-STATE

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