RS-485/RS-422 transceiver — 1 Mbps, 5 V, half-duplex
1 Mbps data rate — bus throughput for fieldbus and HVAC links
The 1 Mbps data rate is the standard maximum for many legacy RS-485 fieldbus protocols (Modbus RTU, BACnet MS/TP at 76.8 kbps typically run slower, but 1 Mbps handles higher-speed point-to-point RS-422 links or custom multi-drop networks). At this rate, cable length is limited by the driver's slew rate and the bus capacitance — expect reliable operation up to a few hundred meters with proper termination. For applications needing faster throughput, a sibling with a higher data rate (e.g., 20 Mbps or 50 Mbps) would be the alternative, but the 1 Mbps variant keeps EMI lower and simplifies layout.
Last Buy — the sourcing window is closing
The SN65HVD3085EDG4 carries a Last Buy product status per the manufacturer's lifecycle record. For a BOM line already qualified to this exact order code, the priority is to secure inventory before the window closes.