SI3474B-A01-IMR

Overview

The SI3474B-A01-IMR is an octal Power Sourcing Equipment (PSE) controller manufactured by Skyworks Solutions. It supports IEEE 802.3af, 802.3at, and 802.3bt standards for Power over Ethernet applications. The device manages power delivery across eight Ethernet ports and features a 200mO current sense resistor. It operates in a 56-QFN package with dimensions of 8x8 mm.

Feature Summary

• Octal-port architecture supporting up to eight simultaneous PoE connections
• Compliance with IEEE 802.3af, 802.3at, and 802.3bt standards
• Supports both autonomous operation and I2C host interface control

Applications

• Power sourcing equipment for network infrastructure
• Multi-port PoE midspan injectors
• High-density PoE switch designs

Procurement Notes

Verify the specific suffix 'IMR' indicates reel packaging when ordering. Confirm that the integrated 200mO current sense resistor meets system requirements. Ensure compatibility with the intended IEEE standard implementation. Check for moisture sensitivity handling instructions during assembly.

Selection Notes

Select this component for designs requiring eight independent PoE channels. Consider the integrated current sensing for simplified bill of materials. Evaluate the I2C interface needs for centralized management. Compare against single-port controllers if fewer channels are sufficient.

Part Context

This part belongs to the Si3474 family of PoE controllers from Skyworks Solutions. It serves as a high-channel-count solution compared to single or dual-port variants. The series targets modern networking equipment requiring significant power distribution capabilities.

Replacement Considerations

The SI3474A-A01-IMR is a related variant within the same product family. Verify pinout and feature parity before substitution. Ensure the replacement supports the required IEEE standards.