HD74HC242(2003) Просмотр технического описания (PDF) - Renesas Electronics

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HD74HC242
(Rev.:2003)

Quad. Bus Transceivers (with 3-state outputs) Quad. Bus Transceivers (with noninverted 3-state outputs)

Renesas Electronics 

HD74HC242/HD74HC243

Quad. Bus Transceivers (with 3-state outputs)

Quad. Bus Transceivers (with noninverted 3-state outputs)

ADE-205-473 (Z)

1st. Edition

Sep. 2000

Description

The HD74HC242 is an inverting buffer and the HD74HC243 is a noninverting buffer. Each device has one

active high enable (GBA), and one active low enable (GAB). GBA enables the A output and GAB enables

the B outputs. The device does not have schmitt trigger inputs.

Features

• High Speed Operation: tpd = 10 ns typ (CL = 50 pF)

• High Output Current: Fanout of 15 LSTTL Loads

• Wide Operating Voltage: VCC = 2 to 6 V

• Low Input Current: 1 µA max

• Low Quiescent Supply Current: ICC (static) = 4 µA max (Ta = 25°C)

Function Table

Control inputs

GAB

GBA

H

H

L

H

H

L

L

L

I : Input

O : Output

O : Inverting Output

Z : Hight Impedance

HD74HC242

Data Port Status

A

B

O

I

Z

Z

Z

Z

I

O

HC74HC243

Data Port Status

A

B

O

I

Z

Z

Z

Z

I

O

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