1

Rev. 07/28/04

SP481/483/485 Low Power Half-Duplex RS485 Transceivers

© Copyright 2002 Sipex Corporation

SP481/SP483/SP485

Low Power Half-Duplex RS-485 Transceivers

FEATURES

■ +5V Only

■ Low Power BiCMOS

■ Driver/Receiver Enable

■ Slew Rate Limited Driver for

Low EMI (SP483)

■ Low Power Shutdown Mode (SP481

and SP483)

■ RS-485 and RS-422 Drivers/Receivers

8

7

6

5

1

2

3

4

Vcc

B

A

GND

D

R

RO

RE

DE

DI

SP481, SP483, and SP485

RE

The SP481, SP483, and the SP485 are a family of half-duplex transceivers that meet the

requirements of RS-485 and RS-422. Their BiCMOS design allows low power operation

without sacrificing performance. The SP481 and SP485 meet the requirements of RS-485

and RS-422 up to 5Mbps. Additionally, the SP481 is equipped with a low power Shutdown

mode. The SP483 is internally slew rate limited to reduce EMI and can meet the requirements

of RS-485 and RS-422 up to 250kbps. The SP483 is also equipped with a low power

Shutdown mode.

DESCRIPTION

SP481, SP483, SP485

Pinout (Top View)

RO 1

RE 2

DE 3

DI 4

8

7

B

6

A

5

GND

D

R

SP485

Top View