PM42100B1-FEI

Overview

The PM42100B1-FEI is a Switchtec PAX Gen 4 Advanced Fabric PCIe switch featuring 100 lanes and 52 ports. It supports PCIe Gen 4 data rates of 16 GT/s with a switching capacity up to 174 GBps. The device utilizes a 40 mm x 40 mm package and includes hot-plug controllers for all ports. It integrates a MIPS processor, extensive I/O interfaces including Ethernet MAC and GPIOs, and advanced error containment mechanisms such as DPC and AER.

Feature Summary

• Supports high-performance non-blocking switching for multi-host SR-IOV sharing and PCIe fabric connectivity.
• Integrates comprehensive diagnostics and debug capabilities including real-time eye capture and TLP generation.
• Features advanced error containment with downstream port containment and completion timeout synthesis.
• Includes an integrated MIPS processor and wide breadth of peripheral I/O interfaces for enclosure management.

Applications

• Scalable multi-host systems
• SR-IOV-enabled JBOFs
• Composable GP-GPU fabrics
• Disaggregated systems
• Rack scale architectures

Procurement Notes

Verify the specific ordering suffix against official Microchip documentation to ensure correct package dimensions and thermal characteristics. Confirm that the selected variant matches the required lane count and port configuration for the target application design. Cross-reference the datasheet revision date to ensure compatibility with current firmware tools.

Selection Notes

Select this model when requiring maximum lane density within the Gen 4 PAX family. Ensure the system design accommodates the 40 mm x 40 mm package footprint. Verify that the host platform supports the necessary PCIe topology and that the integrated MIPS processor requirements align with the enclosure management firmware strategy.

Part Context

This component belongs to the Switchtec PAX Gen 4 Advanced Fabric PCIe Switch family, which also includes variants with 84, 68, 52, 36, and 28 lanes. The PM42100B1-FEI represents the highest capacity option in this specific generation, designed for dense interconnect scenarios in data center environments.

Replacement Considerations

Direct functional substitutes within the same generation include the PM42084B1-FEI (84 lanes) and PM42068B1-FEI (68 lanes). For automotive applications, consider the PM45xxx series equivalents. Upgrading to PCIe Gen 5 or Gen 6 requires a complete architectural redesign due to protocol and physical layer differences.