Texas Instruments SN65HVD77DR, RS-485/RS-422 full-duplex transceiver, 50 Mbps data rate, 3V–3.6V supply, –40°C to 125°C, 8-SOIC package.
| Parameter | Value |
|---|---|
| Type | Transceiver |
| Mounting | Surface Mount |
| Supply voltage | 3V ~ 3.6V |
| Protocol | RS422, RS485 |
| Operating temperature | -40°C~125°C |
| Duplex | Full |
| Package | Tape & Reel (TR); Cut Tape (CT) |
| Data rate | 50Mbps |
| Case | 8-SOIC (0.154\", 3.90mm Width) |
| Receiver hysteresis | 70 mV |
| Number of drivers (Receivers) | 1/1 |
The Texas Instruments SN65HVD77DR is a full-duplex RS-485/RS-422 transceiver rated for 50 Mbps signaling on a single 3.3 V rail (3V to 3.6V).
If your system runs a 5 V bus or mixed-voltage backplane, you will need a level translator or a 5 V-tolerant transceiver.
TI lists the SN65HVD77DR as Active.
Yes, the SN65HVD77DR supports both RS-422 and RS-485 protocols. It is a full-duplex transceiver with one driver and one receiver.
The SN65HVD77DR is a full-duplex transceiver (separate driver and receiver enable pins), while the SN65HVD78DR is a half-duplex variant with a single enable pin for direction control. Both run at 50 Mbps and share the same 3.3 V supply and SOIC-8 footprint, so the choice is purely bus topology: full-duplex for point-to-point or multi-drop with separate transmit/receive pairs, half-duplex for shared two-wire buses.