LTC9111RMSE#TRPBF

Overview

The LTC9111RMSE#TRPBF is an IEEE 802.3cg compliant Single-Pair Power over Ethernet (SPoE) Powered Device (PD) controller manufactured by Analog Devices Inc. It operates within a wide input voltage range of 2.3V to 60V and supports Serial Communication Classification Protocol (SCCP). The device features polarity correction, drives external N-channel MOSFETs for inrush isolation, and includes an integrated 3.5V standby regulator. It is housed in a 12-pin MSOP package.

Feature Summary

• IEEE 802.3cg compliance with SCCP-based classification
• Wide operating voltage range from 2.3V to 60V
• Integrated 3.5V standby regulator
• External MOSFET drive capability for polarity correction

Applications

• Building automation systems
• Factory automation equipment
• Classification-based SPoE networks

Procurement Notes

Verify the specific suffix RMSE against official Analog Devices documentation to confirm package type and tape/reel specifications. Ensure compatibility with system voltage requirements ranging from 2.3V to 60V. Confirm SCCP support if used in classification-based architectures. Check for availability constraints as supply status may vary.

Selection Notes

Select this component for applications requiring strict IEEE 802.3cg compliance and low power consumption during classification. The integrated standby regulator simplifies design by reducing external component count. Consider the 12-pin MSOP package size for space-constrained layouts. Verify that external MOSFETs are suitable for the intended current and voltage levels.

Part Context

The LTC9111 series addresses the growing demand for Single-Pair Ethernet in industrial and building automation. As a PD controller, it manages power negotiation and delivery efficiently. The RMSE variant specifically denotes the MSOP-12 package configuration, distinguishing it from other package options like DFN.

Replacement Considerations

Consult official Analog Devices substitution guides for verified alternatives. Generic SPoE controllers may not support SCCP or the specific 2.3V-60V range. Ensure any substitute maintains IEEE 802.3cg compliance and similar pinout compatibility.