SN54BCT652, SN74BCT652

OCTAL BUS TRANSCEIVERS AND REGISTERS

WITH 3-STATE OUTPUTS

SCBS038A − AUGUST 1989 − REVISED NOVEMBER 1993

2−2

POST OFFICE BOX 655303

• DALLAS, TEXAS 75265

POST OFFICE BOX 1443

• HOUSTON, TEXAS 77251−1443

REAL-TIME TRANSFER

BUS B TO BUS A

REAL-TIME TRANSFER

BUS A TO BUS B

STORAGE FROM

A, B, OR A AND B

TRANSFER STORED DATA

TO A AND/OR B

OEAB

3

X

L

L

OEAB

3

L

21

L

1

CLKAB

X

23

CLKBA

X

2

SAB

X

22

SBA

L

1

CLKAB

X

23

CLKBA

X

2

SAB

L

22

SBA

X

21

H

1

CLKAB

23

CLKBA

X

2

SAB

X

22

SBA

X

1

CLKAB

23

CLKBA

2

SAB

22

SBA

X

H

XX

X

X

X

HL

L

H

H

↑

↑

↑

↑

OEBA

OEBA

3

H

21

H

OEAB OEBA

321

OEAB

OEBA

L

LL

X

X

H

L

HH

L

H

X

X

Figure 1. Bus-Management Functions

Pin numbers shown are for the DW, JT, NT, and W packages.