LTC2865HMSE#PBF

Drivers, Receivers, Transceivers Overview

The LTC2865HMSE#PBF is a low-power, full-duplex RS485/RS422 transceiver manufactured by Analog Devices Inc. It operates on a 3V to 5.5V supply and features ±60V fault protection on data lines during all modes, including power-down. The device supports selectable data rates of 20Mbps or 250kbps via the SLO pin. It includes an independent 1.65V to 5.5V logic supply (VL) for flexible digital interfacing. The component provides ±15kV ESD protection on interface pins, an extended common mode range of ±25V, and guaranteed failsafe receiver operation. It is housed in a 12-lead MSOP package with an exposed pad.

Drivers, Receivers, Transceivers Feature Summary

• Features ±60V overvoltage fault protection on transmission lines during all operational states.
• Includes an independent logic supply pin allowing flexible voltage levels for digital interfaces.
• Provides enhanced ESD protection rated at ±15kV HBM on interface pins.

Drivers, Receivers, Transceivers Applications

• Supervisory Control and Data Acquisition (SCADA)
• Industrial Control and Instrumentation Networks
• Automotive and Transportation Electronics

Drivers, Receivers, Transceivers Procurement Notes

Verify the specific temperature grade suffix against the required operating range. Confirm the package type matches the PCB footprint design. Ensure the logic supply requirements align with the system's digital voltage levels before finalizing procurement.

Drivers, Receivers, Transceivers Selection Notes

Select this model when full-duplex communication is required alongside high fault tolerance. The independent VL pin allows compatibility with lower voltage logic systems while maintaining robust RS485 signaling. Verify that the thermal performance of the MSOP package meets the application's dissipation needs.

Drivers, Receivers, Transceivers Part Context

This component belongs to the LTC2862/LTC2863/LTC2864/LTC2865 family of ruggedized transceivers. It shares pinout compatibility with legacy parts like the LT1785 and LT1791 but offers superior fault protection and noise immunity characteristics suitable for harsh industrial environments.

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 an independent logic supply input ranging from 1.65V to 5.5V. This allows the logic inputs and outputs to operate at different voltage levels than the primary VCC supply.

Does the device support failsafe operation?

Yes, the LTC2865 guarantees failsafe receiver operation. If the differential input voltage is within the threshold region for more than approximately 3µs, the output is forced to a logic 1 state.