1

Rev:B Date: 02/26/04

SP1481E Low Power Half-Duplex RS485 Transceivers

© Copyright 2004 Sipex Corporation

SP1481E

■ +5V supply

■ Low Power BiCMOS

■ Driver/Receiver Enable for Multi-Drop

configurations

■ Low Power Shutdown Mode (1µA

Typical)

■ Available in 8 Pin NSOIC or PDIP

packages (Standard 75176 pinout)

■ Enhanced ESD Specifications:

+15KV Human Body Model

+15KV IEC1000-4-2 Air Discharge

+8KV IEC1000-4-2 Contact Discharge

RS-485 Transceivers

®

PRELIMINARY

The SP1481E is a half-duplex transceiver that meets the specifications of RS-485 and RS-

422 serial protocols with enhanced ESD performance. The ESD tolerance has been improved

on this device to over +15KV for both Human Body Model and IEC1000-4-2 Air Discharge

Method. This device is pin-to-pin compatible with Sipex's SP485 and SP481 devices as well

as popular industry standards. As with the original version, the SP1481E features Sipex's

BiCMOS design allowing low power operation without sacrificing performance. The SP1481E

meets the requirements of the RS-485 and RS-422 protocols up to 20Mbps under load.

DESCRIPTION

R

D

RO 1

RE 2

DE 3

DI 4

8 Vcc

7 B

6 A

5 GND

SP1481E

BLOCK DIAGRAM

1

2

3

4

5

6

7

8

RO

SP1481E

8 Pin - nSOIC

DE

RE

B

VCC

A

DI

GND