SN54HC652, SN74HC652

OCTAL BUS TRANSCEIVERS AND REGISTERS

WITH 3-STATE OUTPUTS

SCLS151B – DECEMBER 1982 – REVISED MAY 1997

2

POST OFFICE BOX 655303

OEAB

X

L

L

OEAB

LL

CLKAB

X

CLKBA

X

SAB

X

SBA

L

CLKAB

X

CLKBA

X

SAB

L

SBA

X

H

CLKAB CLKBA

X

SAB

X

SBA

X

CLKAB

CLKBA

SAB

SBA

X

H

XX

X

X

X

H

L

H or L

H

H

↑

↑

↑

↑

OEBA

OEBA

HH

OEAB OEBA

OEAB

OEBA

H or L

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

3

21

1

23

2

22

1

23

2

22

321

3

21

23

2

22

3

21

1

2

22

1

23

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

Figure 1. Bus-Management Functions