MM74HC245A

更新时间： 2024-11-20 23:02:43

品牌	Logo	应用领域
飞兆/仙童 - FAIRCHILD		/
页数	文件大小	规格书
8页	107K
描述
Octal 3-STATE Transceiver

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数据手册

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MM74HC245A 数据手册

September 1983

Revised May 2005

MM74HC245A

Octal 3-STATE Transceiver

General Description

Features

The MM74HC245A 3-STATE bidirectional buffer utilizes

advanced silicon-gate CMOS technology, and is intended

for two-way asynchronous communication between data

buses. It has high drive current outputs which enable high

speed operation even when driving large bus capaci-

tances. This circuit possesses the low power consumption

and high noise immunity usually associated with CMOS cir-

cuitry, yet has speeds comparable to low power Schottky

TTL circuits.

■ Typical propagation delay: 13 ns

■ Wide power supply range: 2–6V

■ Low quiescent current: 80 A maximum (74 HC)

■ 3-STATE outputs for connection to bus oriented systems

■ High output drive: 6 mA (minimum)

■ Same as the 645

This device has an active LOW enable input G and a direc-

tion control input, DIR. When DIR is HIGH, data flows from

the A inputs to the B outputs. When DIR is LOW, data flows

from the B inputs to the A outputs. The MM74HC245A

transfers true data from one bus to the other.

This device can drive up to 15 LS-TTL Loads, and does not

have Schmitt trigger inputs. All inputs are protected from

damage due to static discharge by diodes to V_CCand

ground.

Ordering Code:

Order Number

MM74HC245AWM

MM74HC245ASJ

MM74HC245AMTC

MM74HC245AN

Package Number

M20B

Package Description

20-Lead Small Outline Integrated Circuit (SOIC), JEDEC MS-013, 0.300" Wide

20-Lead Small Outline Package (SOP), EIAJ TYPE II, 5.3mm Wide

20-Lead Thin Shrink Small Outline Package (TSSOP), JEDEC MO-153, 4.4mm Wide

20-Lead Plastic Dual-In-Line Package (PDIP), JEDEC MS-001, 0.300" Wide

M20D

MTC20

N20A

Devices also available in Tape and Reel. Specify by appending the suffix letter “X” to the ordering code.

Connection Diagram

Truth Table

Pin Assignments for DIP, SOIC, SOP and TSSOP

Control

Inputs

Operation

DIR

B data to A bus

A data to B bus

Isolation

HIGH Level

LOW Level

Irrelevant

Top View

DS005165

www.fairchildsemi.com

12 3 4 5 6 7 8

中文翻译

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MM74HC245ANX	FAIRCHILD	获取价格	Octal 3-STATE Transceiver
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