Texas Instruments SN65HVD888D half-duplex RS-485/RS-422 transceiver, 250 kbps data rate, 4.5V~5.5V supply, 60 mV receiver hysteresis, -40°C~85°C, 8-SOIC package.
| Parameter | Value |
|---|---|
| Type | Transceiver |
| Mounting | Surface Mount |
| Supply voltage | 4.5V ~ 5.5V |
| Protocol | RS422, RS485 |
| Operating temperature | -40°C~85°C |
| Duplex | Half |
| Package | Tube |
| Data rate | 250kbps |
| Case | 8-SOIC (0.154\", 3.90mm Width) |
| Receiver hysteresis | 60 mV |
| Number of drivers (Receivers) | 1/1 |
The 60 mV of receiver hysteresis helps reject noise on the bus, which matters when the cable leaves the cabinet and runs past motor drives or VFDs.
If your system is 3.3 V logic, you'll need a level translator or a different transceiver variant. The 5 V bus voltage gives better noise margin on long twisted-pair runs, but it also means the part won't work on a 3.3 V-only backplane without a regulator.
The SN65HVD888D is a half-duplex transceiver. It uses a single pair of bus wires for both transmit and receive, with the driver and receiver sharing the same differential lines. The driver enable pin controls direction.
The data rate is 250 kbps. This is the slew-limited variant, which intentionally slows the edge rate to reduce radiated emissions on longer cable runs — a common choice for industrial RS-485 networks running at moderate speeds.
The SN65HVD888D is RoHS compliant, as standard for TI's current-production SOIC packages. No lead or restricted substances above the threshold levels.