SI3452A-B01-GM Power Over Ethernet Controller Equivalent & Substitute Parts

Part Overview

The SI3452A-B01-GM is a 4-channel Power Over Ethernet (PoE) controller manufactured by Skyworks Solutions Inc., designed for PSE (Power Sourcing Equipment) applications supporting both 802.3at (PoE+) and 802.3af (PoE) standards. This component is classified as obsolete, making identification of functionally equivalent alternatives necessary for ongoing system design and procurement.

The SI3452A-B01-GM integrates internal switching functionality and operates across a 45V to 57V supply voltage range with a maximum power delivery of 40W per channel configuration. Its 40-QFN (6x6) surface mount package provides a compact footprint suitable for space-constrained PoE controller applications.

Substiute Parts

SI3452A-B01-GM

Skyworks Solutions Inc.In Stock: 1224SI3452A-B01-GM Datasheet

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TPS2384PAP

Texas InstrumentsIn Stock: 2210TPS2384PAP Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the SI3452A-B01-GM is determined by the following critical parameters:

• Functional Type: Must be a 4-channel PSE controller
• Channel Count: Exactly 4 channels required
• Standards Compliance: Support for 802.3af (PoE) is mandatory; 802.3at (PoE+) support is a secondary consideration
• Internal Switching: Must include integrated switch functionality
• Supply Voltage Range: Must accommodate 44V to 57V input range
• Mounting Technology: Surface mount configuration required
• Package Classification: QFN or TQFP package families acceptable

The TPS2384PAP from Texas Instruments meets the core functional requirements as a 4-channel PoE controller with internal switching and 802.3af standard support. While the TPS2384PAP operates at a lower maximum power rating (15.4W versus 40W) and supports only 802.3af rather than dual 802.3at/802.3af standards, it maintains electrical and mechanical compatibility within the specified parameter constraints for standard PoE applications.

Parameter Comparison

Engineering Selection Recommendations

Product Status Consideration: The SI3452A-B01-GM is classified as obsolete, indicating discontinued manufacturing and limited long-term availability. The TPS2384PAP maintains active product status with Texas Instruments, ensuring ongoing supply chain access and technical support.

Standards and Power Rating: Selection between these components depends on application power requirements. The SI3452A-B01-GM supports 802.3at (PoE+) with 40W maximum power delivery, suitable for high-power PoE applications. The TPS2384PAP supports 802.3af (PoE) with 15.4W maximum power delivery, appropriate for standard PoE applications with lower power budgets.

Compliance and Certifications: Both components carry identical Moisture Sensitivity Level (MSL) ratings of 3 (168 Hours) and share the same ECCN and HTSUS classifications, indicating equivalent regulatory treatment. The TPS2384PAP provides extended operating temperature range (-40°C to 125°C) compared to the SI3452A-B01-GM (-40°C to 85°C), offering broader environmental applicability.

Package and Layout Implications: The SI3452A-B01-GM uses a 40-pin QFN package (6x6mm), while the TPS2384PAP uses a 64-pin TQFP package (10x10mm). Substitution requires PCB layout redesign and pin-to-pin signal mapping verification.

Frequently Asked Questions (FAQ)

Q: Can the TPS2384PAP directly replace the SI3452A-B01-GM without PCB modifications?

A: No. The TPS2384PAP uses a 64-pin TQFP package versus the 40-pin QFN package of the SI3452A-B01-GM. Pin counts, pinout assignments, and physical footprints differ significantly, requiring complete PCB layout redesign and signal routing verification.

Q: What is the primary limitation of using TPS2384PAP as a substitute?

A: The TPS2384PAP supports only 802.3af (PoE) standard with a maximum power rating of 15.4W per channel. Applications requiring 802.3at (PoE+) support or power delivery exceeding 15.4W per channel cannot use this substitute without system redesign.

Q: Are there supply voltage compatibility concerns?

A: Both components operate within overlapping supply voltage ranges (44V to 57V for TPS2384PAP; 45V to 57V for SI3452A-B01-GM). The TPS2384PAP extends the lower voltage limit to 44V, providing slightly broader input range compatibility.

Q: How do quiescent current specifications compare?

A: The SI3452A-B01-GM draws 3.7mA quiescent current, while the TPS2384PAP draws 10mA. For battery-powered or low-power standby applications, the SI3452A-B01-GM offers superior efficiency. This difference may impact overall system power consumption calculations.

Q: What are the temperature operating range implications?

A: The TPS2384PAP operates across -40°C to 125°C, extending 40°C above the SI3452A-B01-GM's upper limit of 85°C. For applications in elevated ambient temperature environments, the TPS2384PAP provides superior thermal margin.

Q: Is the TPS2384PAP suitable for new designs?

A: Yes. The TPS2384PAP maintains active product status with Texas Instruments, ensuring long-term availability and technical support. For new designs requiring standard PoE (802.3af) functionality with 15.4W maximum power delivery, the TPS2384PAP is a viable component selection.