What this RS-485 transceiver does on the bus
It handles data at 115 Kbps over a single twisted pair for RS-485 or two pairs for RS-422, with the receiver hysteresis set at 100 mV to reject noise on long cable runs.
Supply rail and temperature range — where it fits
The part requires a regulated 5V supply between 4.75V and 5.25V. If your BOM runs on 3.3V or needs -40°C operation, this is not the drop-in.
Active production — no lifecycle surprise
For a current BOM line, there is no urgency to qualify a second source.