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A1

B1

One of Eight Channels

SAB

CLKAB

SBA

CLKBA

DIR

OE

To Seven Other Channels

21

3

23

22

1

2

4

20

1D

C1

1D

C1

Pin numbers shown are for the DB, DW, JT, NS, PW, and W packages.

SN54LVC646A, SN74LVC646A

OCTAL BUS TRANSCEIVERS AND REGISTERS

WITH 3-STATE OUTPUTS

SCAS302J – JANUARY 1993 – REVISED AUGUST 2005

LOGIC DIAGRAM (POSITIVE LOGIC)

4