The ST3485ECDR is a 3.3V low power Transceiver for RS-485 and RS-422 communications. The device contains one driver and one receiver in half duplex configuration. This device transmits and receives at a guaranteed data rate of at least 12Mbps. All transmitter outputs and receiver inputs are protected to ±15kV IEC 61000-4-2 air discharge. Driver is short-circuit current limited and is protected against excessive power dissipation by thermal shutdown circuitry that places the driver outputs into a high impedance state.
Industry standard 75176 pinout
Current limiting and thermal shutdown for driver overload protection
Guaranteed high receiver output state for floating inputs with no signal present
(EN)
