Description
●The ST485 is al low power transceiver for RS-485 and RS-422 communication. Each part contains
●one driver and one receiver. This transceiver draw 300µA (typ.) of supply current when unloaded or fully loaded with disabled drivers. It operates from a single 5V supply.
●Driver is short-circuit current limited and is protected against excessive power dissipation by thermal shutdown circuitry that placed the driver outputs into a high-impedance state.
●The ST485 is designed for bi-directional data communications on multipoint bus transmission
●line (half-duplex applciations).
●The ST485 is available in three temperature range: commercial (0°C to 70°C), industrial (-40°C to 85°C) and automotive (-55°C to 125°C)
●General features
●■ Low quiescent current: 300µA
●■ Designed for RS-485 interface application
●■ -7V to 12V common mode input voltage range
●■ Driver maintains high impedance in 3-state or with the power OFF
●■ 70mV tipycal input hysteresis
●■ 30ns propagation delay, 5ns skew
●■ Operate from a single 5V supply
●■ Current limiting and thermal shutdown for driver overload protection
●■ Allows up to 64 transceivers on the bus
