MAX5940DESA+T

Overview

The MAX5940DESA+T is a Power-Over-Ethernet (PoE) controller designed for IEEE 802.3af powered devices. It operates within a supply voltage range of 64 V and supports a maximum power dissipation of 470 mW. The component functions across an extended temperature range from -40°C to +85°C. It utilizes a surface-mount SO-8 package and draws a typical operating current of 1 mA.

Feature Summary

• Provides interface control for IEEE 802.3af compliant PoE applications
• Integrates detection and classification logic for powered device identification
• Supports hot-plug insertion without requiring external protection components

Applications

• IEEE 802.3af Powered Device (PD) implementations
• Power-over-Ethernet endpoint controllers
• Network infrastructure powered equipment

Procurement Notes

Verify the specific suffix 'DESA' against the manufacturer's official datasheet to confirm pinout and thermal characteristics. Confirm RoHS compliance status through the latest environmental declaration. Check current availability as distribution channels may indicate limited stock or discontinuation status.

Selection Notes

Select this component for designs strictly adhering to the IEEE 802.3af standard. Ensure the PCB layout accommodates the SO-8 package dimensions. Verify that the system power budget aligns with the 470 mW dissipation limit under worst-case thermal conditions.

Part Context

This part belongs to the MAX5940 family of PoE controllers manufactured by Analog Devices / Maxim Integrated. It serves as a dedicated interface solution for managing power delivery over Ethernet cables in networked electronic systems.

Replacement Considerations

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