LTC2865HMSE#TRPBF

Drivers, Receivers, Transceivers Overview

The LTC2865HMSE#TRPBF is a full-duplex RS485/RS422 transceiver in a 12-lead MSOP package. It operates on a 3V to 5.5V VCC supply and features a separate 1.65V to 5.5V logic supply (VL). The device supports selectable data rates of 20Mbps or low EMI 250kbps via the SLO pin. It provides ±60V fault protection on interface pins, ±15kV ESD protection, and an extended common mode range of ±25V. Operating temperature range is -40°C to +125°C.

Drivers, Receivers, Transceivers Feature Summary

• Features a dedicated VL pin for flexible digital interface voltage levels independent of the main power supply.
• Includes logic-selectable slew rate control to switch between high-speed 20Mbps transmission and low EMI 250kbps modes.
• Provides robust ±60V overvoltage fault tolerance on data lines during all operational states including power-down.

Drivers, Receivers, Transceivers Applications

• Supervisory Control and Data Acquisition (SCADA) systems
• Industrial control and instrumentation networks
• Automotive and transportation electronics
• Building automation, security systems, and HVAC controls

Drivers, Receivers, Transceivers Procurement Notes

Verify the specific ordering suffix matches the required temperature grade and packaging format. Confirm that the HMSE designation corresponds to the 12-lead MSOP package with the specified operating range. Ensure the TRPBF suffix indicates tape and reel delivery. Cross-reference the manufacturer's latest documentation for any potential lead-free finish updates or pin compatibility changes.

Drivers, Receivers, Transceivers Selection Notes

Select this component when a full-duplex RS485/RS422 interface requires independent logic voltage support via the VL pin. It is suitable for applications needing adjustable data rates to balance speed against electromagnetic interference. The wide common mode range and fault protection make it appropriate for electrically noisy industrial environments with significant ground loop voltages.

Drivers, Receivers, Transceivers Part Context

This part belongs to the LTC286x family of rugged transceivers designed for harsh electrical environments. It shares pinout compatibility with legacy parts like the LT1785 and LT1791 but adds enhanced fault protection and flexible logic supply options. The HMSE variant specifically denotes the high-temperature grade housed in the MSOP package.

Drivers, Receivers, Transceivers Replacement Considerations

LT1785

Drivers, Receivers, Transceivers FAQ

How is the data rate selected on the LTC2865?

The data rate is selected using the SLO pin. Driving SLO high enables the 20Mbps high-speed mode, while driving it low selects the 250kbps low EMI slew-limited mode.

What is the function of the VL pin?

The VL pin provides a separate logic supply input ranging from 1.65V to 5.5V. This allows the digital interface thresholds to be compatible with logic levels different from the main VCC supply.

Does the device maintain fault protection when powered off?

Yes, the LTC2865 maintains ±60V fault protection on the A, B, Y, and Z pins even when the device is unpowered or in shutdown mode.