ST485BDR

The ST485 is a low power transceiver for RS-485 and RS-422 communication. Each part contains one driver and one receiver. This transceiver draws 300 μA (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 applications).

Applications

• For RS-485 interface applications
• Bidirectional data communication on multipoint bus transmission lines (half-duplex applications)

Key features

• Low quiescent current: 300 μA
• 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 typical input hysteresis
• 30 ns propagation delay, 5 ns skew
• Operate from a single 5V supply
• Current limiting and thermal shutdown for driver overload protection
• Allows up to 64 transceivers on the bus
• 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)