SP485R Datasheet, PDF (1/9 Pages) Exar Corporation – 1/10th Unit Load RS-485 Transceiver

SP485R
1/10th Unit Load RS-485 Transceiver
FEATURES
• Allows Over 400 Transceivers On A
Transmission Line (1/10th Unit Load)
• High Impedance on Receiver Inputs
(R_IN = 150kΩ typical)
• Half-Duplex Configuration Consistent
With Industry Standard Pinout
• -7V to +12V Common Mode Input
Voltage Range
• Low Power Consumption (250mW)
• Separate Driver and Receiver Enable
DESCRIPTION
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
Exar Corporation 48720 Kato Road, Fremont CA, 94538 • 510-668-7017 • www.exar.com

SP485R_100_072309