The RFDot RD485NE datasheet details specifications, features, and application notes for this RS‑485/RS‑422 transceiver.
The RD485NE is a RS‑485/RS‑422 transceiver designed for low‑power communication with data rates up to 2.5 Mbps. It operates in half‑duplex mode, supports A/B polarity‑reversal communication, and can connect up to 256 devices on a single bus.
The datasheet provides absolute maximum ratings, DC electrical characteristics, switching timings, and typical application circuits. It also outlines recommended pull‑up/down resistor values and the need for a communication speed greater than 25 Hz for reliable operation. This manual is written in Chinese.
| Maximum data rate | 2.5 Mbps |
|---|---|
| Maximum bus nodes | 256 |
| ESD protection | ±15 kV (HBM) |
| Supply voltage (Vdd) | 4.5‑5.5 V |
| Operating temperature range | -40 °C to +85 °C |
| Input high voltage (VIH) | 2 V |
| Input low voltage (VIL) | 0.8 V |
| Driver differential output (no load) VOD1 | 5 V |
| Receiver output high voltage (VOH) | 4.2‑4.8 V |
The RD485NE supports a data transmission rate of up to 2.5 Mbps.
The bus can accommodate up to 256 transceivers.
Yes, the chip can communicate with the A and B pins interchanged, eliminating polarity concerns.