PM40084B1-FEI

Overview

The PM40084B1-FEI is a Switchtec PFX Gen 4 Fanout PCIe switch supporting 84 lanes and 44 ports. It features up to 22 virtual switch partitions and 42 non-transparent bridges (NTBs). The device operates at PCIe Gen 4 speeds of 16 GT/s with advanced error containment, hot-plug controllers per port, and an integrated MIPS processor for management.

Feature Summary

• Supports flexible port bifurcation from x1 to x16 without restrictions on upstream/downstream configuration or NTB mapping.
• Includes high-performance ultra-low latency DMA engine and comprehensive diagnostics with real-time eye capture.
• Provides robust error containment via Advanced Error Reporting (AER), Downstream Port Containment (DPC), and Completion Timeout Synthesis.

Applications

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

Procurement Notes

Verify the exact part number against official Microchip documentation, as datasheets list PM40084B-FEI. Confirm package type, temperature grade, and ordering suffixes match project requirements before purchase.

Selection Notes

Select this model for applications requiring 84 lanes and 44 ports. Consider PM40100B-FEI for higher capacity or PM40068B-FEI for lower lane counts. Ensure compatibility with required I/O interfaces and partition needs.

Part Context

Part of the Switchtec PFX Gen 4 Fanout PCIe Switch Family, which includes variants ranging from 28 to 100 lanes. These switches are designed for high-reliability environments with extensive diagnostic and security features.

Replacement Considerations

PM40084B-FEI is the confirmed equivalent part number listed in the datasheet. Verify if the '1' suffix indicates a specific revision or variant not detailed in the public summary.

FAQ

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

The PM40084B1-FEI supports up to 42 NTBs assignable to any port.

Does the switch support hot-plug capabilities?

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

What I/O interfaces are available?

It offers up to 11 Two-Wire Interfaces, 4 SGPIO ports, Ethernet MAC, UARTs, JTAG, and EJTAG.