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2.5 Mb/s Isolated RS485 Communication Interface With up to 500 mW Supplementary Power

From California Eastern Laboratories - CEL

This application note provides a reference design for a flexible, high power RS485 interface using NEC's PS9821 digital optocouplers and an LMS1487 transceiver from National Semiconductor.
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Topics of Interest

Describes features, structures, and basic characteristics of NEC's PS2500 Series optocouplers.

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Serial interfaces transmit data one bit at a time. Common standards include RS232, RS422, and RS485. The RS232 standard is approved by the Electronic Industries Association (EIA) for connecting serial...