HD74HC640 - Octal Bus Transceivers

Product Overview

Hitachi Semiconductor

Part number	HD74HC640
Manufacturer	Hitachi Semiconductor
File Size	69.43 KB
Description	Octal Bus Transceivers
Datasheet	HD74HC640 Datasheet
Additional preview pages of the HD74HC640 datasheet.

Each device has an active enable G and a direction 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.

High Speed Operation: tpd = 12 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 G L L H DIR L H X Operation HD74HC640 B data to A bus A data to B bus Isolation HD74HC643 B data to A bus A data to B bus Isolation HD74HC640/HD74HC643 Pin Arrangement HD74HC640 DIR A1 A2.

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Published: Mar 23, 2005 |