SI3473A-A01-IM

Overview

The SI3473A-A01-IM is an octal Power Sourcing Equipment (PSE) controller designed for IEEE 802.3bt Type 3 and Type 4 applications, supporting up to 90W per port. It integrates eight independent PoE ports within a single package, enabling high-density power distribution for LAN infrastructure. The device operates with a supply voltage range of 3V to 3.6V and supports standards including 802.3af, 802.3at, and 802.3bt. It is housed in a 56-QFN (8x8 mm) surface-mount package suitable for compact board designs.

Feature Summary

• Integrates eight independent PoE channels for high-density port configurations
• Supports IEEE 802.3bt Type 3 and Type 4 power delivery standards
• Backward compatible with 802.3af and 802.3at legacy protocols

Applications

• High-port-count PoE switches and hubs
• IEEE 802.3bt compliant network infrastructure equipment
• Compact access points requiring centralized power management

Procurement Notes

Verify the specific suffix 'A01' against the manufacturer's latest documentation to ensure correct revision level. Confirm that the 56-QFN package dimensions match your PCB footprint requirements. Ensure design compliance with IEEE 802.3bt safety isolation standards for high-power PoE implementations.

Selection Notes

Select this component when system architecture requires consolidating multiple PoE controllers into a single unit to reduce bill of materials count. It is appropriate for designs needing support for higher power budgets defined in 802.3bt compared to standard 802.3at solutions. Evaluate thermal management capabilities given the integration of eight channels in a small form factor.

Part Context

This part belongs to Skyworks Solutions' family of PoE/LAN power switch integrated circuits. It serves as a central controller for managing power allocation across multiple Ethernet ports, distinguishing itself from single-channel switches by offering octal integration for scalable network node deployments.

Replacement Considerations

The SI3473B-A01-IM is a related variant within the same product family. Verify functional equivalence and pin compatibility before substitution, as differences may exist in internal configuration or supported power tiers.