The SP485 is low-power transceivers for RS-485 and RS-  422 communication. IC contains one driver and one receiver.  The driver slew rates of the SP485 is not limited, allowing  them to transmit up to 2.5Mbps.  These transceivers draw between 120µA and 500µA of  supply current when unloaded or fully loaded with disabled  drivers. All parts operate from a single 5V supply. Drivers are  short-circuit current limited and are protected against  excessive power dissipation by thermal shutdown circuitry  that places the driver outputs into a high-impedance state.  The receiver input has a fail-safe feature that guarantees a  logic-high output if the input is open circuit. The SP485 is  designed for half-duplex applications.