MAX5941ACSE+

Overview

The MAX5941ACSE+ is a single-channel IEEE 802.3af-compliant Power-over-Ethernet (PoE) interface and PWM controller designed for Powered Devices (PDs). It operates within a supply voltage range of 18V to 67V and draws a typical supply current of 400µA. The device supports a maximum power output of 12.95W and functions reliably across an operating temperature range of 0°C to +70°C. Housed in a 16-SOIC package, it integrates essential control logic for PoE applications without internal switches.

Feature Summary

• Complies with IEEE 802.3af standards for PoE Powered Device classification and detection
• Integrates PWM controller functionality for external power stage management
• Operates over a wide input voltage range suitable for standard PoE interfaces

Applications

• IEEE 802.3af Powered Device implementations
• Low-cost complete power solutions including 12V buck converters
• Telecom hot-swap reference designs immune to overvoltage transients

Procurement Notes

This component is officially End-of-Life (EOL) as per Product Change Notification dated September 27, 2021. Verify availability through authorized distributors or secondary market sources. Confirm RoHS compliance status and check for valid replacement part numbers before finalizing procurement plans.

Selection Notes

Select this controller for designs requiring strict IEEE 802.3af compliance in a compact 16-SOIC footprint. Ensure the external circuitry supports the 18V-67V operating range and 12.95W power limit. Consider the EOL status when planning long-term production cycles and evaluate alternative controllers if future supply stability is required.

Part Context

Part of the MAX5941 family from Analog Devices/Maxim Integrated, specifically engineered for Ethernet-based power distribution. The ACSE+ suffix indicates commercial temperature grade and lead-free packaging. It serves as a core interface controller for managing power delivery in networked devices adhering to legacy PoE standards.

Replacement Considerations

MAX5941B variants are documented substitutes within the same product family.