MAX5945EAX+

Overview

The MAX5945EAX+ is a quad Power-over-Ethernet (PoE) controller compliant with the IEEE 802.3af standard, designed for use in Powered Device (PD) or Midspan applications. It operates within a supply voltage range of 32V to 60V and draws a typical supply current of 4.2mA. The device supports four independent channels, each capable of delivering up to 15.4W of power. It is housed in a 36-lead SSOP package and functions reliably across an industrial temperature range of -40°C to +85°C.

Feature Summary

• Complies with IEEE 802.3af standards for PoE detection and classification
• Supports four independent channels for multi-port Ethernet applications
• Integrates programmable I2C interface for configuration control

Applications

• Endpoint Powered Device (PD) implementations
• Midspan power insertion systems
• Multi-port network infrastructure equipment

Procurement Notes

Verify component authenticity through authorized distributors due to discontinued status. Confirm RoHS3 compliance and check for specific manufacturing date codes. Ensure storage conditions meet moisture sensitivity level requirements prior to assembly.

Selection Notes

Select this component for designs requiring strict adherence to IEEE 802.3af protocols. Evaluate thermal management capabilities given the 15.4W per channel limit. Consider the 36-SSOP footprint constraints during PCB layout planning.

Part Context

Part of the Maxim Integrated MAX5945 family, this controller simplifies PoE integration by handling detection, classification, and power delivery logic. It replaces discrete solutions, reducing board space and design complexity for network administrators.

Replacement Considerations

Publicly confirmed substitute part numbers are not available in the provided documentation.