The 30 mV receiver hysteresis cleans up noisy bus signals without external filtering, and the industrial temperature range (-40 to 85°C) means it lives in the cabinet, not the climate-controlled office.
At 20 Mbps you can push a full-duplex RS-422 stream over tens of metres without dropping into the noise. That is fast enough for high-resolution encoder feedback on a servo axis or for shuttling configuration data between a host controller and a bank of smart sensors. The full-duplex capability means you get simultaneous transmit and receive on separate wire pairs, so no half-duplex turnaround delay — useful when the protocol expects continuous handshaking.
The 10-VSSOP (also listed as 10-TFSOP, 10-MSOP) is a 3.00 mm wide body, 0.118" pitch — small enough to fit on a cramped I/O card but still hand-solderable with a fine tip and steady hands. Surface-mount only, so no socket for field swapping. If you are laying out a new board, the supply bypass cap needs to sit close to the VCC pin (pin 8) to keep the 20 Mbps edge rates clean. The industrial temp range covers the usual factory-floor and outdoor telecom enclosures.