MAX5940AESA+T

Overview

The MAX5940AESA+T is a Power-over-Ethernet (PoE) Powered Device (PD) interface controller compliant with IEEE 802.3af standards. It operates within a supply voltage range of 30 V to 67 V and draws a typical quiescent current of 400 uA. The device is housed in an SOIC-Narrow-8 package and supports surface-mount installation. It functions across an extended temperature range from -40°C to +85°C, with a maximum power dissipation of 470 mW.

Feature Summary

• Compliant with IEEE 802.3af PoE standards for powered device classification and detection
• Integrated high-side switch with overcurrent protection capabilities
• Low quiescent current consumption for efficient power management

Applications

• Power-over-Ethernet endpoint devices
• VoIP telephones
• Wireless LAN access points
• Network surveillance cameras

Procurement Notes

Verify the specific suffix designation carefully, as the requested model includes a 'T' indicating tape-and-reel packaging, whereas official datasheets often list the 'MAX5940AESA+' variant in tube packaging. Confirm availability status directly with the manufacturer or authorized distributors, as supply constraints may apply to this component series.

Selection Notes

Select this component for designs requiring strict adherence to IEEE 802.3af PD specifications. Ensure the PCB layout accommodates the SOIC-Narrow-8 footprint and thermal requirements given the 470 mW dissipation limit. Validate that the system voltage remains within the 30 V to 67 V operational window during all operating 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 integrating Ethernet connectivity with power delivery in compact network infrastructure equipment. The family focuses on simplifying PD implementation through integrated detection and classification logic.

Replacement Considerations

Publicly confirmed substitute part numbers are not available in the provided documentation. Verify compatibility with alternative PoE controllers based on pinout and electrical specification alignment.