SN75ALS1177, SN75ALS1178

DUAL DIFFERENTIAL DRIVERS AND RECEIVERS

SLLS154B – MARCH 1993 – REVISED FEBRUARY 2001

2

POST OFFICE BOX 655303

Function Tables

SN75ALS1177, SN75ALS1178

(each driver)

INPUT

ENABLE

OUTPUTS

D

DE

Y

Z

H

H

H

L

L

H

L

H

X

L

Z

Z

SN75ALS1177

(each receiver)

DIFFERENTIAL

A–B

ENABLE

RE

OUTPUT

Y

VID ≥ 0.2 V

L

H

–0.2 V < VID < 0.2 V

L

?

VID ≤ –0.2 V

L

L

X

H

Z

Open

L

H

SN75ALS1178

(each receiver)

DIFFERENTIAL

A–B

OUTPUT

Y

VID ≥ 0.2 V

H

–0.2 V < VID < 0.2 V

?

VID ≤ –0.2 V

L

Open

H

H = High level, L = Low level,

? = Indeterminate,

X = Irrelevant,

Z = High impedance (off)

SN75ALS1177

SN75ALS1178

15

1D

EN2

4

1R

3

EN

4

1DE

15

1D

† These symbols are in accordance with ANSI/IEEE Std 91-1984 and IEC Publication 617-12.

EN1

12

DE

9

2D

2R

5

1Y

14

1Z

13

1A

2

1B

1

2Y

10

2Z

11

2A

6

2B

7

RE

2

2

1

1

1

1

1R

3

1Y

14

1Z

13

1A

2

1B

1

2Y

10

2Z

11

2A

6

2B

7

EN

12

2DE

9

2D

2R

5