MAX5945CAX+

Overview

The MAX5945CAX+ is a quad network power controller compliant with IEEE 802.3af (PoE) standards, designed for endpoint or midspan Powered Device (PD) applications. It operates within a wide digital power input range from VEE to AGND + 7.7V and supports -48V-powered Ethernet ports. The device integrates current protection, PD detection, classification, and hot-swap control features. Packaged in a 36-SSOP, it functions across an industrial temperature range of -40°C to 85°C.

Feature Summary

• IEEE 802.3af PoE compliance for reliable power delivery
• Integrated hot-swap voltage control for safe port insertion
• Supports independent control of four Ethernet channels

Applications

• Endpoint Powered Device (PD) implementations
• Midspan Powered Device (PD) configurations
• -48V-powered Ethernet port management systems

Procurement Notes

Verify the specific suffix 'CAX+' against official Analog Devices documentation to confirm lead-free status and package dimensions. Cross-reference the datasheet revision history to ensure compatibility with current manufacturing processes. Confirm that the component meets RoHS3 requirements as specified in the latest public release notes.

Selection Notes

Select this component when designing PoE endpoints requiring four independent channel controls under IEEE 802.3af standards. Ensure the system design accommodates the required wide digital power input common-mode range. Verify that the thermal performance of the 36-SSOP package aligns with the application's heat dissipation constraints.

Part Context

This part belongs to the Maxim Integrated PoE controller family, specifically engineered for multi-port network power solutions. It serves as a dedicated management IC for handling power negotiation and distribution in structured cabling environments, replacing discrete logic solutions with integrated control capabilities.

Replacement Considerations

Public confirmed substitute: MAX5945EAX+. Verify pinout and electrical parameter equivalence before substitution.