SN75ALS170, SN75ALS170A

TRIPLE DIFFERENTIAL BUS TRANSCEIVER

SLLS055D – AUGUST 1987 – REVISED SEPTEMBER 1995

2

POST OFFICE BOX 655303

Function Tables

EACH DRIVER

INPUT

DIR

OUTPUTS

D

DIR

A

B

H

H

H

L

L

H

L

H

X

L

Z

Z

EACH RECEIVER

DIFFERENTIAL INPUTS

DIR

OUTPUT

A – B

DIR

R

VID ≥ 0.3 V

L

H

– 0.3 V < VID < 0.3 V

L

?

VID ≤ – 0.3 V

L

L

X

H

Z

Open

L

H

H = high level, L = low level, ? = indeterminate,

X = irrelevant, Z = high impedance (off)

1

1

1

EN

EN

EN

EN

EN

EN

3D

3DIR

2D

2DIR

1D

1DIR

9

10

6

7

1

2

3B

3A

2B

2A

1B

1A

13

12

15

14

20

19

† This symbol is in accordance with ANSI/IEEE Std 91-1984 and

IEC Publication 617-12.

Pin numbers shown are for the DW package.

logic diagram (positive logic)

1B

1A

1D

1DIR

1

2

20

19

2B

2A

2D

2DIR

6

7

15

14

12

13

10

9

3DIR

3D

3A

3B