MAX5940BESA+T

Overview

The MAX5940BESA+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 supports up to 12.95 W of power delivery. The device features a 39.9 V undervoltage lockout threshold and a maximum output current of 500 mA. Designed for surface-mount installation, it utilizes an 8-pin SOIC package and functions reliably across an industrial temperature range from -40°C to +85°C.

Feature Summary

• Compliant with IEEE 802.3af PoE standards for powered device integration
• Integrated detection and classification circuitry for network switch compatibility
• Supports high-power applications up to 12.95 W with 500 mA output capability

Applications

• Power-over-Ethernet powered devices
• Network infrastructure equipment requiring IEEE 802.3af compliance
• Industrial control systems utilizing PoE interfaces

Procurement Notes

Verify the specific suffix 'B' against your design requirements, as it denotes a distinct variant within the MAX5940 family compared to other versions like the 'A'. Confirm that the 8-SOIC package and 67 V input rating align with your schematic constraints. Ensure availability through authorized distributors due to potential limited stock status for this specific part number.

Selection Notes

Select this component when designing systems requiring strict adherence to IEEE 802.3af specifications. The 67 V maximum input voltage accommodates standard PoE classifications. Consider the 8-SOIC footprint for PCB layout constraints. Verify thermal dissipation capabilities given the 470 mW power dissipation limit in enclosed environments.

Part Context

This component belongs to the MAX5940 series of PoE controllers manufactured by Analog Devices / Maxim Integrated. It serves as a specialized interface solution for integrating Ethernet connectivity with power delivery in compact electronic designs. The series provides standardized compliance for networked devices requiring external power sourcing via Ethernet cables.

Replacement Considerations

The MAX5940AESA+ is a related variant within the same series but may differ in electrical characteristics or pin configuration. Verify functional equivalence before substitution. No other direct public substitute part numbers are confirmed for this specific model.