SLLA628 September 2023 THVD1424
Many RS-485 devices will have additional features in addition to meeting the base standard. These include, but are not limited to, auto-direction, input fail-safe protection (keeps ‘R’ output known during bus open, idle, and short states), polarity correction, integrated termination, flexible power rails, slew rate limiting, and power over data bus to name a few. These niche features can either be realized through selection of IC with needed features or using external circuits to realize the final circuit.