Half-duplex RS-485/RS-422 transceiver in 8-SOIC
The receiver includes 50 mV of hysteresis for improved noise immunity on long twisted-pair buses.
For extended or outdoor applications a wider-temperature variant (e.g., -40°C to 85°C) would be needed.
50 mV hysteresis — noise margin on the bus
The 50 mV of receiver hysteresis helps reject noise on the RS-485 differential bus, reducing the chance of false triggers from ringing or crosstalk on long cable runs. This is a standard value for this transceiver family and provides adequate margin for most industrial installations without external filtering.