HC646 datasheet(2/10 Pages) HITACHI

Part #	HC646

Description	Octal Bus Transceivers/Registers with Multiplexed 3-state outputs

PDF	10 Pages

Scroll/Zoom	100%

Manufacturer	HITACHI [Hitachi Semiconductor]

Direct Link	http://www.renesas.com/eng

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2 / 10 page

HD74HC646/HD74HC648

Function Table

Inputs

Control

Clock

Select

Data I/O

Operation or Function

Direction BA AB AB

BA A1 thru A8 B1 thru B8 HD74HC646

HD74HC648

Z (Input)

Isolation

Z (Input)

Store A & B data

Store

A & B data

Output

Z (Input)

B real-time data to

A bus

B real-time data to

A bus

Output

Z (Input)

B stored data to A

bus

B stored data to A

bus

LLXH

Output

Z (Input)

B stored data to A

bus

B stored data to A

bus

Z (Input)

Output

A real-time data to

B bus

A real-time data to

B bus

Z (Input)

Output

A stored data to B

bus

A stored data to B

bus

Z (Input)

Output

A stored data to B

bus

A stored data to B

bus

Real-time transfer

Bus B to Bus A

Real-time transfer

Bus A to Bus B

HC646 Datasheet(PDF) 2 Page - Hitachi Semiconductor

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