2

Functional Diagram

IEC Logic Symbol

TRUTH TABLE (NOTE 1)

CONTROL INPUTS

OPERATION

OE

DIR

L

L

B Data to A Bus

L

H

A Data to B Bus

H

X

Isolation

NOTES:

1. H = High Voltage Level

L = Low Voltage Level

X = Irrelevant

2. To prevent excess currents in the High-Z (isolation) modes, all I/O terminals should be terminated

with 10k

Ω to 1 MΩ resistors.

2

3

4

5

6

7

8

9

18

17

16

15

14

13

12

B0

B1

B2

B3

B4

B5

B6

B7

A0

A1

A2

A3

A4

A5

A6

A7

1

GND = PIN 10

19

DIR

OE

11

CD74FCT245, CD54FCT245

18

17

16

G3

3

4

5

15

14

13

12

6

7

8

9

3EN1

11

3EN1

19

1

1

2

2

CD54FCT245, CD74FCT245