PM40028B-F3EI

Overview

The PM40028B-F3EI is a Switchtec PFX Gen 4 Fanout PCIe switch supporting 28 lanes and 16 ports. It provides up to 14 non-transparent bridges (NTBs) and supports 8 virtual switch partitions. The device features hot- and surprise-plug controllers for each port, advanced error containment including AER and DPC, and an integrated MIPS processor. It operates at PCIe Gen 4 speeds of 16 GT/s with support for ASPM and manual PHY configuration.

Feature Summary

• High-performance non-blocking architecture with flexible port bifurcation capabilities
• Advanced error containment mechanisms including Downstream Port Containment and Completion Timeout Synthesis
• Comprehensive diagnostics and debug tools featuring real-time eye capture and external loopback

Applications

• Data center equipment
• Defense and industrial servers
• Cellular infrastructure
• Metro networks and core networking

Procurement Notes

Verify the specific ordering suffix against official Microchip documentation to confirm package type and temperature range. Ensure compatibility with required PCIe Gen 4 link training standards. Confirm availability of ChipLink diagnostic tools for system integration and validation purposes before procurement.

Selection Notes

Select this model when 28 lanes and 16 ports are sufficient for the target topology. Consider higher lane counts like the PM40052 or PM40100 if more NTBs or partitions are required. Evaluate power management requirements against ASPM capabilities and verify interface compatibility with passive, managed, or optical cables.

Part Context

This component belongs to the Switchtec PFX Gen 4 Fanout PCIe Switch Family, which includes variants ranging from 28 to 100 lanes. The family shares common architectural features such as high-reliability error containment, integrated processors, and extensive I/O interfaces designed for robust server and networking applications.

Replacement Considerations

Compatible substitutes within the same family include PM40036B-F3EI, PM40052B-F3EI, PM40068B-FEI, PM40084B-FEI, and PM40100B-FEI. These parts offer increased lane counts and port configurations while maintaining similar functional architectures.