PM40084B-FEI

Overview

The PM40084B-FEI is a high-reliability PCIe switch from the Switchtec PFX Gen 4 Fanout family. It supports up to 84 lanes and provides 44 downstream ports with 42 non-transparent bridges (NTBs). The device features 22 virtual switch partitions and includes hot- and surprise-plug controllers for each port. It operates at PCIe Gen 4 speeds of 16 GT/s and integrates an advanced DMA controller, comprehensive error containment mechanisms like AER and DPC, and real-time diagnostics including eye capture.

Feature Summary

• High-performance non-blocking architecture supporting flexible lane bifurcation and logical non-transparent interconnects.
• Integrated high-speed DMA engine and robust error containment with per-port hot- and surprise-plug controllers.
• Comprehensive diagnostic capabilities featuring real-time eye capture, external loopback, and performance counters.
• Extensive peripheral I/O interfaces including TWI, SGPIO, Ethernet MAC, UART, and JTAG support.

Applications

• Data center equipment
• Defense and industrial servers
• Cellular infrastructure

Procurement Notes

Verify the specific ordering suffix against official Microchip documentation to ensure correct package type and temperature range. Confirm that the component matches the exact part number PM40084B-FEI to avoid compatibility issues with system requirements. Always check for the latest datasheet revisions before finalizing procurement decisions.

Selection Notes

Select this model when 84 lanes and 44 ports are required within the PFX Gen 4 family. Consider the PM40100B-FEI for higher capacity or the PM40068B-FEI for reduced pin count. Ensure the design accommodates the BBGA-1311 package and supports the necessary peripheral I/O interfaces for management and control functions.

Part Context

This component belongs to the Switchtec PFX Gen 4 Fanout PCIe Switch Family, which also includes variants like the PM40100B-FEI and PM40068B-FEI. These devices share common architectural features such as the integrated MIPS processor and advanced error reporting but differ in lane counts and port configurations to suit various scalability needs.

Replacement Considerations

Direct replacements within the same family include the PM40100B-FEI for increased capacity or the PM40068B-FEI for lower density. Verify pin-to-pin compatibility and software configuration support before substituting any other PCIe switch models.

FAQ

What is the maximum number of non-transparent bridges supported by the PM40084B-FEI?

The PM40084B-FEI supports up to 42 non-transparent bridges (NTBs) assignable to any port.

Does the PM40084B-FEI support hot-plugging?

Yes, it includes hot- and surprise-plug controllers for each of its 44 downstream ports.

What diagnostic tools are available on this switch?

It offers real-time eye capture, external loopback capability, per-port performance and error counters, and access to configuration data via ChipLink Diagnostic Tools.