PM40028B1-F3EI

Overview

The PM40028B1-F3EI is a Gen 4 Fanout PCIe switch supporting 28 lanes and 16 ports. It provides up to 14 non-transparent bridges (NTBs) and 8 virtual switch partitions. The device includes hot- and surprise-plug controllers for each port, advanced error containment mechanisms such as AER and DPC, and an integrated MIPS processor. It supports PCIe Gen 4 speeds of 16 GT/s with flexible port bifurcation options.

Feature Summary

• High-performance non-blocking architecture with support for logical non-transparent interconnects
• Integrated high-performance ultra-low latency DMA controller
• Advanced error containment including Completion Timeout Synthesis and per-port hot-plug controllers
• Comprehensive diagnostics featuring real-time eye capture and external loopback capability

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 ensure correct package type and temperature range. Confirm that the F3EI designation aligns with the required pinout and thermal specifications for your design. Cross-reference the datasheet revision date to ensure compatibility with current manufacturing standards.

Selection Notes

Select this model when a 28-lane configuration is sufficient for the target topology. Consider the PM40052 or PM40068 if higher port counts are needed. Evaluate the NTB and partition requirements to ensure the 14 NTBs and 8 partitions meet system isolation needs without over-provisioning resources.

Part Context

This component belongs to the Switchtec PFX Gen 4 Fanout PCIe Switch Family, which also includes variants like the PM40100, PM40084, and PM40052. These devices share common architectural features such as the integrated MIPS processor and ChipLink diagnostic tools, differing primarily in lane count and port density.

Replacement Considerations

Direct substitutes within the family include the PM40028B-FEI. For different lane counts, consider the PM40036B-F3EI or PM40052B-F3EI. Verify pin-to-pin compatibility and software configuration requirements before swapping between variants.