LTC2865CMSE#TRPBF

Drivers, Receivers, Transceivers Overview

The LTC2865CMSE#TRPBF 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. Packaged in a 12-lead MSOP with an exposed pad, it provides ±15kV ESD protection on interface pins and guarantees failsafe receiver operation within an extended ±25V common mode range.

Drivers, Receivers, Transceivers Feature Summary

• Features ±60V overvoltage fault protection on transmission lines across all operational states.
• Supports dual data rate selection between high-speed 20Mbps and low-EMI 250kbps modes.
• Includes an independent VL pin allowing 1.65V to 5.5V logic interface compatibility.
• Provides robust ±15kV HBM ESD protection on A, B, Y, and Z interface pins.

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 #TRPBF confirms tape and reel packaging when sourcing. Confirm the CMSE designation corresponds to the commercial temperature grade and MSOP package variant required for the design. Cross-reference the manufacturer part number against official distributor catalogs to ensure authenticity and correct component revision.

Drivers, Receivers, Transceivers Selection Notes

Select this component when full-duplex communication with independent logic voltage levels is required. The SLO pin allows dynamic switching between 20Mbps and 250kbps speeds to optimize EMI performance. Ensure the application environment requires ±60V line fault tolerance and that the 12-lead MSOP footprint fits the PCB layout constraints.

Drivers, Receivers, Transceivers Part Context

This part belongs to the LTC2862/LTC2863/LTC2864/LTC2865 family of ruggedized transceivers. While other variants offer half-duplex operation or lack the separate VL pin, the LTC2865 specifically provides full-duplex capability with flexible logic supply integration. It shares pinout compatibility with legacy parts like the LT1785 and LT1791 for certain configurations.

Drivers, Receivers, Transceivers Replacement Considerations

Public confirmed substitutes include the LTC2865CMSE#PBF for tube packaging. Pin-compatible alternatives from the same family are the LTC2862 series for half-duplex applications. Verify thermal dissipation requirements if replacing higher-power legacy transceivers.

Drivers, Receivers, Transceivers FAQ

How is the data rate selected on the LTC2865?

The maximum data rate is selected using the SLO pin. Driving SLO high enables the 20Mbps high-speed mode, while driving it low limits the rate to 250kbps for reduced EMI.

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 voltage levels different from the primary VCC supply.

Does the device support operation during power-down?

Yes, the ±60V fault protection remains active on the A, B, Y, and Z pins even when the device is powered down or in shutdown mode.