ST485, RS-485 and It is a low power transceiver for RS-422 communication. Each part contains a driver and a receiver. This transceiver draws 300 μA (typ) of supply current when unloaded or fully loaded with disabled drivers. It operates from a single 5 V supply.
The drive short-circuit current is limited and is protected against excessive power loss by a thermal shutdown circuit that puts the drive outputs into a high impedance state. The ST485 is designed for bidirectional data communication on a multipoint bus transmission line (half-duplex applications).
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