Key facts
- Brand
- STMicroelectronics
- Model
- ST485B
- Industry
- Industrial
- Documents
- 2
- Languages
- EN
- Last added
- 2012-08-08
Start here
STMicroelectronics ST485B/ST485C Low Power RS-485/RS-422 Transceiver Datasheet
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.
Read onlineSTMicroelectronics ST485B specifications
| 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) |
Source: STMicroelectronics ST485B/ST485C Low Power RS-485/RS-422 Transceiver Datasheet
All STMicroelectronics ST485B documents by type
Ratings, dimensions and ordering codes, for selection and design work.
Questions answered in these manuals
What is the typical supply current of the ST485?
The transceiver draws 300 µA of supply current when unloaded or fully loaded with disabled drivers.
From: STMicroelectronics ST485B/ST485C Low Power RS-485/RS-422 Transceiver Datasheet
What supply voltage is required for the ST485?
The device operates from a single 5 V supply.
From: STMicroelectronics ST485B/ST485C Low Power RS-485/RS-422 Transceiver Datasheet
What is the typical supply current when the device is unloaded?
The typical quiescent supply current is 300 µA.
How many transceivers can be connected on the same bus?
The transceiver allows up to 64 devices on the bus.