Exar Corporation 48720 Kato Road, Fremont CA, 94538 • 50-668-707 • www.exar.com

SP485R_00_072309

DESCRIPTION

FEATURES

• Allows Over 400 Transceivers On A

Transmission Line (/0th Unit Load)

• High Impedance on Receiver Inputs

(R

• Half-Duplex Configuration Consistent

With Industry Standard Pinout

• -7V to +2V Common Mode Input

Voltage Range

• Low Power Consumption (250mW)

• Separate Driver and Receiver Enable

SP485R

1/10th Unit Load RS-485 Transceiver

The

SP485R is a pin-to-pin equivalent to our existing SP485 product and offers a high

receiver input impedance. The higher receiver input impedance allows for connecting over

400 transceivers on a single transmission line without degrading the RS-485 driver signal.

The device is packaged in a 8-pin plastic DIP or 8-pin narrow SOIC.

Figure 1. Typical Application Circuit