1

Rev. 5/16/03

SP481E Low Power Half-Duplex RS485 Transceivers

© Copyright 2003 Sipex Corporation

SP481E/SP485E

■ +5V Only

■ Low Power BiCMOS

■ Driver/Receiver Enable for Multi-Drop

configurations

■ Low Power Shutdown Mode

(SP481E)

■ Enhanced ESD Specifications:

DESCRIPTION

The SP481E and the SP485E are a family of half-duplex transceivers that meet the

specifications of RS-485 and RS-422 serial protocols with enhanced ESD performance. The

ESD tolerance has been improved on these devices to over +15KV for both Human Body

Model and IEC1000-4-2 Air Discharge Method. These devices are pin-to-pin compatible with

Sipex's SP481 and SP485 devices as well as popular industry standards. As with the original

versions, the SP481E and the SP485E feature Sipex's BiCMOS design allowing low power

operation without sacrificing performance. The SP481E and SP485E meet the requirements

of the RS-485 and RS-422 protocols up to 10Mbps under load. The SP481E is equipped with

a low power Shutdown mode.

+15KV Human Body Model

+15KV IEC1000-4-2 Air Discharge

+8KV IEC1000-4-2 Contact Discharge

Enhanced Low Power Half-Duplex

RS-485 Transceivers

R

D

RO 1

RE 2

DE 3

DI 4

8 Vcc

7 B

6 A

5 GND

SP481E and SP485E

®