Product Overview
ST3485EBDR from ST is a 3.3V RS-485/RS-422 transceiver supporting data rates up to 16Mbps. 1/4 unit load (128 nodes). Low EMI. SOIC-8. Extended ESD protection.
Working Principle
Differential driver converts TX to A/B bus signals. Receiver converts bus to RX. DE/RE control driver/receiver enable. 1/4 unit load allows up to 128 nodes on bus. 3.3V single supply with 5V tolerant I/O.
Pin Description
| Pin | Name | Function |
|---|---|---|
| 1 | RO | Receiver output |
| 2 | RE | Rx enable |
| 3 | DE | Driver enable |
| 4 | DI | Driver input |
| 5 | GND | Ground |
| 6 | A | Non-inverting bus |
| 7 | B | Inverting bus |
| 8 | VCC | 3.3V supply |
Applications
- High-speed RS-485 communication
- Industrial network backbones
- Profibus and Modbus at high speed
Alternative Models
| Manufacturer | Part Number | Notes |
|---|---|---|
| ST | ST3485ECDR | TSSOP-8 version |
| TI | SN65HVD1782DR | Similar RS-485 |