2

Functional Diagram

TRUTH TABLE

CONTROL INPUTS

OPERATION

OE

DIR

L

L

B Data to A Bus

L

H

A Data to B Bus

H

X

Isolation

H = High Level, L = Low Level, X = Irrelevant

To prevent excess currents in the High-Z (isolation) modes, all I/O

terminals should be terminated with 10k

Ω to 1MΩ resistors.

18

17

16

15

13

11

12

14

2

B0

B1

B2

B3

B4

B5

B6

B7

OE

DIR

1

19

4

9

3

5

6

7

8

A0

A1

A2

A3

A4

A5

A6

A7

CD54/74AC245, CD54/74ACT245