MAX5942BCSE+T

Overview

The MAX5942BCSE+T is a Power-Over-Ethernet (PoE) interface and PWM controller designed for Powered Devices (PD). It complies with the IEEE 802.3af standard, providing detection and classification signatures alongside an integrated isolation switch. The device operates within a supply voltage range of 18V to 67V and supports a maximum power output of 12.95W. Packaged in a 16-SOIC format, it functions as a standalone controller suitable for flyback and forward converter topologies.

Feature Summary

• Complies with IEEE 802.3af standards for PoE detection and classification
• Integrates a compact DC-DC PWM controller for isolated or non-isolated designs
• Includes an integrated isolation switch with programmable inrush current control

Applications

• Powered Device (PD) interface implementation in PoE systems
• Flyback converter design for PoE applications
• Forward converter design for PoE applications

Procurement Notes

Verify component authenticity through authorized distributors or manufacturer channels. Confirm RoHS compliance status and lead times directly with suppliers. Note that this specific part number may be subject to limited availability or end-of-life restrictions; validate current production status before finalizing procurement plans.

Selection Notes

Select this component for designs requiring strict adherence to IEEE 802.3af PoE protocols. Ensure the application utilizes a 16-SOIC package footprint. Verify that the external circuitry supports the required 18V to 67V input range and that the thermal management accommodates the specified power dissipation limits for the target operating temperature range.

Part Context

This component belongs to the Maxim Integrated MAX5942 family, specialized for Power-over-Ethernet applications. It serves as a complete solution for Powered Devices by combining interface logic with power conversion control. The BCSE+T suffix indicates a tape-and-reel packaging variant within the broader MAX5942 product line.

Replacement Considerations

Publicly confirmed substitute part numbers are not available in the provided documentation. Evaluate alternative PoE controllers from the same manufacturer family only if they explicitly support IEEE 802.3af and compatible pinouts.