IN74AC643DW Просмотр технического описания (PDF) - Integral Corp.

Номер в каталоге

Компоненты Описание

производитель

IN74AC643DW

Octal 3-State Bus Transceiver High-Speed Silicon-Gate CMOS

Integral Corp. 

TECHNICAL DATA

Octal 3-State Bus Transceiver

High-Speed Silicon-Gate CMOS

IN74AC643

The IN74AC643 is identical in pinout to the LS/ALS643,

HC/HCT643. The device inputs are compatible with standard CMOS

outputs; with pullup resistors, they are compatible with LS/ALS

outputs.

The IN74AC643 is a 3-state transceiver that is used for 2-way

asynchronous communication between data buses. The device has an

active-low Output Enable pin, which is used to place the I/O ports into

high-impedance states. The Direction control determines whether data

flows from A to B or from B to A.

• Outputs Directly Interface to CMOS, NMOS, and TTL

• Operating Voltage Range: 2.0 to 6.0 V

• Low Input Current: 1.0 µA; o.1 µA @ 25°C

• High Noise Immunity Characteristic of CMOS Devices

• Outputs Source/Sink 24 mA

ORDERING INFORMATION

IN74AC643N Plastic

IN74AC643DW SOIC

TA = -40° to 85° C for all

packages

PIN ASSIGNMENT

LOGIC DIAGRAM

PIN 20=VCC

PIN 10 = GND

506

FUNCTION TABLE

Control Inputs

Output Direction

Enable

L

L

L

H

H

X

X = don’t care

Operation

Data Transmitted

from Bus B to

Bus A

Data Transmitted

from Bus A to

Bus B (inverted)

Buses Isolated

(High Impedance

State)

Share Link: