SN65HVD1785DR RS-485 / RS-422 Transceiver – ±70V Fault Protected (Texas Instruments)

Description

SN65HVD1785DR RS-485 / RS-422 Transceiver – ±70V Fault Protected

The SN65HVD1785DR from Texas Instruments is a high-reliability RS-485 and RS-422 differential transceiver designed for robust industrial communication networks. Featuring ±70V fault protection, this device ensures reliable operation even in harsh electrical environments with high voltage transients, ground shifts, or wiring faults. It supports half-duplex and full-duplex communication with excellent noise immunity and low power consumption. Supplied in a compact SOIC-8 surface-mount package, the SN65HVD1785DR is ideal for space-constrained designs. This transceiver is widely used in industrial automation, PLC systems, motor drives, building automation, energy meters, and long-distance serial communication where reliability and signal integrity are critical.

Applications

• Industrial automation and PLC communication
• Factory and process control networks
• Motor drives and servo controllers
• Energy meters and smart grid systems
• Building automation and HVAC controls
• Long-distance serial communication links

How to Use

1. Connect A and B lines to the differential RS-485 bus.
2. Provide proper termination resistors for long cable runs.
3. Ensure correct DE and RE control for transmit/receive operation.
4. Operate within the specified supply voltage range.
5. Use proper grounding to maximize noise immunity.