LTC2865CMSE#PBF

Drivers, Receivers, Transceivers Overview

The LTC2865CMSE#PBF is a full-duplex RS485/RS422 transceiver manufactured by Analog Devices Inc. It operates on a 3V to 5.5V supply and supports data rates up to 20Mbps or low EMI 250kbps via a logic-selectable mode. The device features ±60V fault protection on transmission lines, ±15kV ESD protection on interface pins, and an extended common mode range of ±25V. It includes a dedicated 1.65V to 5.5V logic supply pin (VL) for flexible digital interfacing. Packaged in a 12-lead MSOP with an exposed pad, it operates within a temperature range of 0°C to 70°C.

Drivers, Receivers, Transceivers Feature Summary

• Features ±60V overvoltage fault protection on data lines during all operational modes, including power-down.
• Includes a separate logic supply pin (VL) allowing independent voltage levels for the digital interface.
• Provides enhanced ESD protection rated at ±15kV HBM on interface pins and ±8kV on other pins.
• Supports high input impedance enabling connection of up to 256 nodes on the bus.

Drivers, Receivers, Transceivers Applications

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

Drivers, Receivers, Transceivers Procurement Notes

Verify the specific package variant and temperature grade against project requirements before ordering. Confirm that the VL pin configuration aligns with the system's logic voltage levels. Ensure PCB layout accommodates the MSOP footprint and thermal pad connections as specified in the datasheet.

Drivers, Receivers, Transceivers Selection Notes

Select this component when full-duplex communication is required alongside robust fault tolerance. The inclusion of the VL pin distinguishes it from similar parts lacking independent logic supplies. Consider the 250kbps slew-limited mode if electromagnetic interference reduction is a priority over maximum throughput.

Drivers, Receivers, Transceivers Part Context

This part belongs to the LTC2862/LTC2863/LTC2864/LTC2865 family of rugged transceivers. Unlike half-duplex variants, the LTC2865 provides simultaneous transmit and receive capabilities. It shares pin compatibility with legacy LT1785 and LT1791 devices, facilitating direct upgrades in existing designs requiring higher fault protection.

Drivers, Receivers, Transceivers Replacement Considerations

LT1785 and LT1791 are confirmed pin-compatible replacements for legacy designs, though they lack the integrated ±60V fault protection found in the LTC2865 series.