ST485BN Datasheet PDF - ST Microelectronics

●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 300 µA (typ.) of supply current when unloaded or fully loaded with disabled drivers. It operates from a single 5 V 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).

●Features

●■ Low quiescent current: 300 µA

●■ Designed for RS-485 interface application

●■ -7 V to 12 V common mode input voltage range

●■ Driver maintains high impedance in 3-state or with the power OFF

●■ 70 mV typical input hysteresis

●■ 30 ns propagation delay, 5 ns skew

●■ Operate from a single 5 V supply

●■ Current limiting and thermal shutdown for driver overload protection

●■ Allows up to 64 transceivers on the bus