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Зато вот нашёл. Industry's Smallest Isolated RS‑485 Transceiver https://www.intersil.com/en/products/interface/serial-interface/isolated-rs-485/ISL32704E.html
Key Features 4Mbps data rate 2.5kVRMS isolation per UL 1577 600VRMS working voltage per VDE 0884 3V to 5V power supplies Single unit load allows up to 32 devices on the bus 50kV/μs (typical), 30kV/μs (minimum) common-mode transient immunity 44000 years barrier life 15kV ESD bus-pin protection Low EMC footprint Thermal shutdown protection -40°C to +85°C temperature range Meets or exceeds ANSI RS-485 16 Ld QSOP package UL 1577 recognized VDE V0884-11 certification pending