MAX5940CESA+T

Overview

The MAX5940CESA+T is a single-channel Power-over-Ethernet (PoE) Powered Device (PD) interface controller compliant with IEEE 802.3af standards. It operates within an input voltage range of 30 V to 67 V and supports up to 12.95 W of power delivery with a maximum current of 500 mA. The device features a 36.6 V undervoltage lockout threshold and functions reliably across an industrial temperature range of -40°C to +85°C. Packaged in an 8-pin SOIC, it integrates essential control logic for PoE applications.

Feature Summary

• Complies with IEEE 802.3af standards for Powered Device integration
• Integrates control logic for single-channel PoE operation
• Supports high-power PD applications up to 12.95 W

Applications

• IEEE 802.3af Powered Device implementations
• Power-over-Ethernet network endpoint devices
• Industrial communication equipment requiring PoE power

Procurement Notes

Verify component authenticity through authorized Analog Devices distributors or certified partners. Confirm the suffix 'T' indicates tape-and-reel packaging if required by assembly processes. Ensure the 'CESA' designation matches the specific temperature grade and package variant needed for the design. Request original manufacturer documentation to validate RoHS compliance and traceability before procurement.

Selection Notes

Select this component for designs requiring strict IEEE 802.3af compliance in a compact SOIC-8 footprint. It is suitable for applications needing integrated control logic without external microcontrollers. Consider the 30 V to 67 V operating range and 500 mA current limit when sizing downstream power stages. Verify thermal management requirements given the 470 mW power dissipation capability in the selected package.

Part Context

This part belongs to the MAX5940 family of PoE controllers from Analog Devices/Maxim Integrated. The 'C' suffix denotes the commercial-to-industrial temperature range (-40°C to +85°C), while 'ESA' specifies the 8-pin SOIC package. The '+T' indicates lead-free construction and tape-and-reel shipping format. It serves as a dedicated interface solution for powering Ethernet-connected devices efficiently.

Replacement Considerations

Check for direct equivalents within the MAX5940 series, such as MAX5940DESA+T or MAX5940AESA+, noting differences in voltage ranges and packaging. Verify pin compatibility and electrical specifications against datasheets before substitution. No other cross-manufacturer replacements are confirmed in public documentation.