7

Rev. 10/11/02

SP3490/3491 Low Power Full-Duplex RS485 Transceivers

© Copyright 2002 Sipex Corporation

Figure 14. Pinout for the SP3491

Figure 13. Pinout for the SP3490

PIN FUNCTION - SP3490

Pin 1 - V

Pin 2 - R - Receiver output.

Pin 3 - D - Driver input.

Pin 4 - GND - Ground connection.

Pin 5 - Y - Non-inverting driver output.

Pin 6 - Z - Inverting driver output.

Pin 7 - B - Inverting receiver input.

Pin 8 - A - Non-inverting receiver input.

PIN FUNCTION - SP3491

Pin 1 - NC - No connect.

Pin 2 - R - Receiver output.

Pin 3 - REB - Receiver output enable active LOW.

Pin 4 - DE - Driver output enable active HIGH.

Pin 5 - D - Driver input.

Pin 6 - GND - Ground connection.

Pin 7 - GND - Ground connection.

Pin 8 - NC - No connect.

Pin 9 - Y - Non-inverting driver output.

Pin 10 - Z - Inverting driver output.

Pin 11 - B - Inverting receiver input.

Pin 12 - A - Non-inverting receiver input.

Pin 13 - NC - No connect.

Pin 14 - V

6

1

2

3

4

5

7

8

Vcc

GND

R

D

A

B

Z

Y

R

D

9

10

11

12

13

14

NC

REB

DE

GND

NC

NC

1

2

3

4

5

6

7

8

R

D

Vcc

GND

R

D

A

B

Z

Y