The 250 kbps data rate covers standard serial communication up to typical UART baud rates, and the 300 mV receiver hysteresis ensures noise immunity on the line.
Supply range and signal-level compatibility
At 3.3V it still generates the RS-232 ±5V output swing required by the standard, so you don't need a separate charge-pump rail or level translator. This simplifies the power tree on mixed-voltage boards and reduces BOM count. The 300 mV receiver hysteresis filters out noise on longer cable runs, which is a practical benefit when the serial link leaves the PCB.
Active lifecycle — no end-of-line risk for new builds
This is a straightforward choice for a new design that needs a proven, widely used RS-232 interface without worrying about a mid-lifecycle swap.