Texas Instruments SN65HVD78DR, Half-Duplex RS-485/RS-422 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 | Half |
| Package | Tape & Reel (TR); Cut Tape (CT) |
| Data rate | 50Mbps |
| Case | 8-SOIC (0.154\", 3.90mm Width) |
| Receiver hysteresis | 80 mV |
| Number of drivers (Receivers) | 1/1 |
Receiver hysteresis is specified at 80 mV, which helps reject noise on long or electrically noisy bus runs.
For a BOM line, this part can be qualified into new designs and multi-year production runs without an imminent replacement search.
No extra regulator is needed when your system already runs 3.3V logic.
The difference is packaging: the DR suffix denotes Tape & Reel (suitable for automated pick-and-place), while the D suffix typically ships in tubes. Both are 8-SOIC footprint.
Yes — the SN65HVD78DR is RoHS compliant per TI's standard lead-free assembly process. No separate exemption documentation is needed for EU RoHS compliance.