STMicroelectronics ST485C
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.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
DESCRIPTION
Each part contains one driver and one receiver. 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). DIP-8 SO-8 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). Table 1. Device summ...