PCI11101/MXX

Overview

The Microchip Technology PCI11101/MXX is a single-chip PCIe switch integrating a USB 3.2 Gen 2 host controller and programmable I/O. It features a 4-lane (4x8GT/s) upstream port and a 2-lane (2x8GT/s) downstream port, certified for PCIe Gen 4 compliance. The device includes an integrated xHCI USB 3.2 Gen 2 host controller with 10Gbps PHY support. Power requirements are met by two external supplies: +3.3V and +1.1V. It operates within commercial (0°C to +70°C) or industrial (-40°C to +85°C) temperature ranges and is housed in a 132-pin DRQFN package.

Feature Summary

• PCIe Gen 4 Switch Fabric: 4-lane upstream and 2-lane downstream ports with 512-byte maximum payload size.
• Integrated USB Host: xHCI compliant USB 3.2 Gen 2 controller with 10Gbps PHY and overcurrent sense/port control.
• Programmable I/O: Pin multiplexer supporting SMBus, SPI, UART, and GPIO functions accessed via PCIe endpoint controller.
• Power Management: Supports PCIe 3.1 LPSS L2 state and includes integrated power-on reset with configurable under/over voltage protection.

Applications

• Math offload systems
• Vision intelligence and machine vision cameras
• Servers utilizing Next-Generation BMC without PCH

Procurement Notes

Verify the ordering suffix against the product identification system. The 'Blank' suffix indicates standard tray packaging, while 'T' denotes tape and reel. Temperature grades are specified as 'Blank' for commercial (0°C to +70°C) or 'I' for industrial (-40°C to +85°C). Confirm the specific variant matches the required environmental and packaging specifications for the design.

Selection Notes

Select the PCI11101/MXX when high-bandwidth PCIe subsystems are required for embedded applications. Ensure the design accommodates the 132-pin DRQFN package dimensions and land pattern. Verify that the system architecture supports the necessary clocking (single-ended 25MHz crystal/clock plus PCIe reference) and power rails (+3.3V, +1.1V) before finalizing the component choice.

Part Context

The PCI11101 belongs to Microchip's specialized interface IC portfolio, designed to consolidate connectivity functions. It combines switching, host control, and programmable I/O into a single silicon solution, reducing bill of materials complexity compared to discrete implementations. This integration targets modern embedded architectures requiring flexible I/O mapping and high-speed data transfer capabilities.

Replacement Considerations

Publicly confirmed substitute part numbers are not available in the provided documentation. Designers should consult Microchip sales offices for alternative components or updated product family recommendations if the PCI11101/MXX is no longer suitable for the application.

FAQ

What is the maximum line rate supported by the PCI11101?

The device supports a maximum line rate of 8GT/s and is certified against the GEN4 compliance program defined in the PCIe Revision 4.x specifications.

How many external clocks are required for operation?

Although multiple internal clocks are generated by an integrated clock farm, only a single-ended 25MHz clock or crystal and a PCIe reference clock are required externally.

Does the device support latch-up protection?

Yes, the latch-up performance exceeds 150mA per EIA/JESD78, Class II standards.