ST485B/ST485C is a low power RS-485/RS-422 transceiver from ST company. It features low quiescent current (300 µA), single 5V supply, can work in -40 °C to 85 °C industrial temperature range. It is suitable for bidirectional data communication.
The ST485B and ST485C are low power transceivers designed for RS-485 and RS-422 communication applications. Each part contains one driver and one receiver, drawing a typical supply current of 300 µA when unloaded or fully loaded with disabled drivers. The device operates from a single 5 V supply and includes current limiting and thermal shutdown for driver overload protection.
| Supply voltage | 5 V |
|---|---|
| Quiescent current (typical) | 300 µA |
| Common mode input voltage range | -7 V to 12 V |
| Propagation delay (typical) | 30 ns |
| Output skew (typical) | 5 ns |
| Input hysteresis (typical) | 70 mV |
| Temperature ranges | Commercial (0°C to 70°C), Industrial (-40°C to 85°C), Automotive (-55°C to 125°C) |
The transceiver draws 300 µA of supply current when unloaded or fully loaded with disabled drivers.
The device operates from a single 5 V supply.
The input voltage range is -7 V to 12 V.
Yes, it features current limiting and thermal shutdown for driver overload protection.