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SP481

Low Power Half-Duplex RS-485 Transceivers

Signal Processing Technologies 

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

RO 1

R

8 VCC

RE 2

7B

DE 3

6A

D

DI 4

SP485 5 GND

Top View

SP481, SP483, SP485

Pinout (Top View)

DESCRIPTION

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.

RO 1

RE 2

DE 3

DI 4

R

D

8 Vcc

7B

6A

5 GND

SP481, SP483, and SP485

Rev. 07/28/04

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

1

© Copyright 2002 Sipex Corporation

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