Texas Instruments SN65HVD1791D, RS-422/RS-485 Transceiver, Full Duplex, 1/1 Drivers/Receivers, 115Kbps, 14-SOIC, -40°C to 105°C, 4.5V to 5.5V Supply.
| Parameter | Value |
|---|---|
| Type | Transceiver |
| Mounting | Surface Mount |
| Supply voltage | 4.5V ~ 5.5V |
| Protocol | RS422, RS485 |
| Operating temperature | -40°C~105°C |
| Duplex | Full |
| Package | Tube |
| Data rate | 115Kbps |
| Case | 14-SOIC (0.154\", 3.90mm Width) |
| Receiver hysteresis | 50 mV |
| Number of drivers (Receivers) | 1/1 |
It handles one driver and one receiver on a 5 V supply rail, with a data rate capped at 115 kbps.
For a BOM line, this is a clean commit — no last-time-buy planning needed, no surplus-channel scramble on the horizon.
Pin pitch is 1.27 mm, so orientation is easy to verify by eye before powering up.
The SN65HVD1791D is rated for a maximum data rate of 115 kbps. That is the ceiling for this transceiver — it is not a high-speed RS-485 part like the 10 Mbps or 50 Mbps variants in the same family. If your bus runs at 115.2 kbaud or slower, this part fits.
The SN65HVD1791D is a full-duplex transceiver (one driver, one receiver), while the SN65HVD1790D is half-duplex (one driver and one receiver sharing the bus pins, requiring direction control). Both run at 115 kbps on a 5 V supply in the same SOIC-14 footprint. The choice comes down to whether your bus needs simultaneous transmit and receive (full duplex) or a shared two-wire bus (half duplex).