SI3454-B04-IMR

Overview

The SI3454-B04-IMR is a Power Sourcing Equipment (PSE) controller IC designed for IEEE 802.3at compliant Power over Ethernet applications. It integrates four independent channels, enabling the management of up to four Ethernet ports simultaneously. The device operates within a supply voltage range of 3.3 V and supports an operating temperature range from -40°C to +85°C. It features a surface-mount package suitable for automated assembly. The component includes current limiting capabilities with a specified limit of 3 mA for protection functions.

Feature Summary

• Integrates four independent PSE channels for multi-port power delivery
• Complies with IEEE 802.3at standards for PoE++ power sourcing
• Includes integrated current limiting for port protection

Applications

• IEEE 802.3at compliant Power Sourcing Equipment systems
• Multi-port Ethernet switch power management
• PoE midspan injector designs requiring four-channel control

Procurement Notes

Verify component status carefully as this part number may be restricted or not recommended for new designs. Confirm availability through official Skyworks Solutions distributors. Ensure the specific suffix matches required packaging and tape-and-reel specifications. Cross-reference with authorized datasheets to verify pinout and electrical characteristics before integration into production schedules.

Selection Notes

Select this controller when designing systems requiring four-channel PoE power sourcing under IEEE 802.3at standards. Consider thermal performance within the -40°C to +85°C range. Evaluate board space requirements for the surface-mount package. Compare against single-channel alternatives if fewer ports are sufficient. Verify compatibility with downstream PD detection logic.

Part Context

This component belongs to Skyworks Solutions' specialized power management IC portfolio focused on Ethernet connectivity. It addresses the growing demand for centralized power distribution in network infrastructure. The four-channel architecture simplifies design complexity compared to discrete solutions. It serves as a core control element in modern PoE-enabled networking hardware.

Replacement Considerations

SI3472A-A01-IMR is listed as a suggested manufacturer alternative. Verify functional equivalence and pin compatibility before substitution. Check for any differences in channel count or standard compliance between the original and replacement parts.