Half-duplex RS-485/422 transceiver at 500 kbps
The MAX3085ESA+ from Analog Devices is a half-duplex transceiver supporting both RS-422 and RS-485 protocols, with a single driver and single receiver on board. The 500 kbps data rate is the nominal ceiling for this part — the actual throughput on a given bus depends on cable length, termination, and the number of nodes, but the driver's slew rate is limited to keep radiated emissions in check for this speed class.
Supply range and receiver hysteresis
The receiver hysteresis of 100 mV provides noise margin on the differential bus; this is the typical value, so the actual switching threshold at the A and B pins has a guaranteed dead band that prevents chatter on long or lightly-terminated cables.
SOIC-8 footprint and board integration
The supplier device package is 8-SOIC — the standard narrow-body footprint that matches the industry-wide SOIC-8 land pattern. The tube packaging is the factory-shipment format; the part is also available in tape-and-reel under a different order code for automated assembly.