SI3474B-A01-IM

Overview

The SI3474B-A01-IM is an octal-port Power Sourcing Equipment (PSE) controller manufactured by Skyworks Solutions Inc. It supports IEEE 802.3af, 802.3at, and 802.3bt standards for Power over Ethernet applications. The device provides eight independent channels with a maximum power output of 90 W per port. It operates within a supply voltage range of 3 V to 3.6 V and draws a typical supply current of 17 mA. The component functions reliably across an operating temperature range from -40°C to +85°C. It is housed in a compact 56-QFN package measuring 8x8 mm.

Feature Summary

• Supports autonomous operation or I2C host interface control
• Compliant with IEEE 802.3af, 802.3at, and 802.3bt PoE standards
• Integrates eight independent PSE channels

Applications

• Octal-port PoE switch designs
• IEEE 802.3bt compliant network infrastructure
• Power sourcing equipment for LAN systems

Procurement Notes

Verify the specific datasheet revision and ordering information directly with Skyworks Solutions Inc. or authorized distributors. Confirm that the 56-QFN package dimensions and pinout match your PCB layout requirements. Ensure compliance with RoHS and REACH regulations as specified in the official documentation before finalizing procurement.

Selection Notes

Select this component for designs requiring high-density PoE integration with support for Type 4 power delivery. The integrated nature of the controller reduces external component count compared to discrete solutions. Consider the thermal management requirements associated with 90 W output capabilities when designing the system enclosure and PCB copper planes.

Part Context

This part belongs to the Skyworks Si3474 series of PoE controllers. It serves as a specialized solution for network switches requiring multiple powered ports. The device simplifies the design process by integrating control logic and protection features necessary for compliant PoE deployment in modern networking hardware.

Replacement Considerations

Check for compatible alternatives such as the SI3474A-A01-IMR, noting differences in current sense resistor integration and packaging. Verify electrical compatibility and pin-to-pin correspondence before substitution.