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SP490EDS/14

SP490E Enhanced Full Duplex RS-485 Transceivers

© Copyright 2000 Sipex Corporation

SP490E/SP491E

Enhanced Full Duplex RS-485 Transceivers

s +5V Only

s Low Power BiCMOS

s Driver/Receiver Enable (SP491E)

s RS-485 and RS-422 Drivers/Receivers

s Pin Compatible with LTC490 and

SN75179 (SP490E)

s Pin Compatible with LTC491 and

SN75180 (SP491E)

s Improved ESD Specifications:

±15kV Human Body Model

±15kV IEC1000-4-2 Air Discharge

±8kV IEC1000-4-2 Contact Discharge

DESCRIPTION…

The SP490E is a low power differential line driver/receiver meeting RS-485 and RS-422

standards up to 10Mbps. The SP491E is identical to the SP490E with the addition of driver

and receiver tri-state enable lines. Both products feature

±200mV receiver input sensitivity,

over wide common mode range. The SP490E is available in 8-pin plastic DIP and 8-pin NSOIC

packages for operation over the commercial and industrial temperature ranges. The SP491E

is available in 14-pin DIP and 14-pin NSOIC packages for operation over the commercial and

industrial temperature ranges.

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

SP490E

SP491E

®