HD74HC643 Datasheet Octal Bus Transceivers

Manufacturer: Hitachi Semiconductor (now Renesas)

Overview: HD74HC640/HD74HC643 Octal Bus Transceivers (with 3-state outputs).

Datasheet Details

Part number	HD74HC643
Manufacturer	Hitachi Semiconductor (now Renesas)
File Size	69.43 KB
Description	Octal Bus Transceivers
Datasheet	HD74HC643_HitachiSemiconductor.pdf

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.

Brand Logo	Part Number	Description	Other Manufacturers
	HD74HC643	Octal Bus Transceivers	Renesas

Part Number	Description
HD74HC640	Octal Bus Transceivers
HD74HC646	Octal Bus Transceivers/Registers
HD74HC648	Octal Bus Transceivers/Registers
HD74HC620	Octal Bus Transceivers
HD74HC623	Octal Bus Transceivers
HD74HC651	Octal Bus Transceivers/Registers
HD74HC652	Octal Bus Transceivers/Registers
HD74HC668	Synchronous UP/Down Decade/4-bit binary Counter
HD74HC669	Synchronous UP/Down Decade/4-bit binary Counter
HD74HC670	4-by-4 Register