Microchip Technology PCI11101C Single-Chip PCIe Switches
Microchip Technology PCI11101C Single-Chip PCIe Switches integrate a USB 3.2 Gen 2 host controller and programmable I/O. The Microchip PCI11101C features PCIe physical interfaces providing a 4‑lane (4×8GT/s) upstream port and a 2‑lane (2×8GT/s) downstream port, delivering up to 8GT/s to support higher‑bandwidth PCIe subsystems in embedded applications. The upstream interface can operate over one or multiple lanes for system design flexibility, and the device includes a standards‑compliant PCIe implementation from the external physical interfaces through the switch fabric and endpoint controllers. The device also supports PCIe Precision Time Measurement (PTM), as specified in PCI Express Base Specification R5.0 V1.0, enabling precise timing exchange to determine the relationship between local device clocks and the PTM Master Time domain.
The PCI11101C incorporates a USB‑IF and xHCI‑compliant USB 3.2 Gen 2 host controller that provides one USB 3.2 Gen 2 port supporting 10Gbps operation for Type‑A or Type‑C, M.2 breakout, or embedded applications. These switches also include Overcurrent Sense (OCS) and Vbus Port Control. A programmable pin multiplexer allows designers to map I/O functions to package pins using either the default configuration or custom signal routing. Supported functions range from USB‑related signals to GPIO and SMBus, which are accessed through a dedicated PCIe Endpoint Controller.
Although the device requires multiple internal clocks, all are generated by an integrated clock farm, allowing operation with only a single‑ended 25MHz external clock or crystal along with a PCIe reference clock. Standard software abstractions enable seamless support across major operating systems. The Microchip PCI11101C is offered in a 132‑pin VQFN‑DR package and available in commercial (0°C to +70°C), industrial (‑40°C to +85°C), and automotive Grade 3 (‑40°C to +85°C) temperature ranges.
Features
- Integrated PCIe (8GT/s) switching fabric, 512-byte maximum payload size
- Integrated PCIe physical interfaces
- 4-lane (4x 8GT/s) upstream port allowing single, dual, or 4-lane links
- 2-lane (2x 8GT/s) downstream port
- Integrated USB 3.2 Gen 2 (10Gbps) physical interfaces
- Integrated xHCI USB 3.2 Gen 2 (10Gbps) USB host controller
- 10Gbps Gen 2 PHY
- USB HS/FS/LS PHY
- Two external (+3.3V and +1.1V) power supplies
- Comprehensive power management features PCIe 3.1 Low Power Sub States (LPSS) - L2 (with auxiliary power supply), LPSS L1.1 (snooze), and L1.2 (off)
- Power and I/O
- Integrated power-on reset circuit with configurable under-/over-voltage protection
- Latch-up performance exceeds 150mA per EIA/JESD78, Class II
- JEDEC Class 2 ESD performance
- I/O multiplexer (SMBus/SPI/UART/GPIO)
- I/O optimized for M.2 interface breakouts
- UARTs
- RS232/RS422/RS485
- Auto-direction control
- Standard and advanced speed support
- Basic or comprehensive signal support
- Multifunction GPIOs
- Programmable pin multiplexer
- Ability to use a low-cost 25MHz crystal or clock for reduced BOM
- PCIe Precision Time Measurement (PTM)
- Support for common reference clock and separate reference clocks (SRNS and SRIS)
- SPI peripheral interface
- SMBus target interface
- SMBus controller interface
- JTAG TAP
- PVT sensor
- Available in commercial, industrial, and AEC-Q100 Grade 3 temperature ranges
- Lead-free, RoHS-compliant 132-pin VQFN-DR package
Applications
- Math offload
- Vision intelligence, cameras, and machine vision
- Servers with NG BMC and no PCH
Specifications
- Supply voltage ranges
- 1.09V to 1.21V for 1.1V supply
- 2.97V to 3.63V for 3.3V supply
- Variable supply voltage ranges
- 1.62V to 1.98V range at 1.8V
- 2.25V to 2.75V range at 2.5V
- 2.97V to 3.63V range at 3.3V
- Reset current
- 187.2mA for 1.1V supply
- 15.48mA for 3.3V supply
- Sleep current
- 329mA for 1.1V supply
- 42.8mA for 3.3V supply
- Idle current
- 675mA for 1.1V supply
- 112mA for 3.3V supply
- USB active current ranges
- 810mA to 1040mA for 1.1V supply
- 124mA to 125mA for 3.3V supply
- Peripheral active current
- 675mA for 1.1V supply
- 112mA for 3.3V supply
- PCIe active current
- 4-lane UFP + 1-lane DFP at 8GT/s
- 746mA for 1.1V supply
- 116mA for 3.3V supply
- 4-lane UFP + 2-lane DFP at 8GT/s
- 805mA for 1.1V supply
- 132mA for 3.3V supply
- 4-lane UFP + 1-lane DFP at 8GT/s
- 0ms to 5ms power supply turn-on time range
- Ambient operating temperature ranges in still air
- 0°C to +70°C for commercial version
- -40°C to +85°C for industrial version
- -40°C to +85°C for Automotive Grade 3 version
- +125°C maximum junction temperature
- 3kV Human Body Model (HBM) ESD protection
Internal Block Diagram
Related Switches
Microchip Technology PCI11101 PCIe Switch w/ USB 3.2 Host Controller
Combines a USB 3.2 Gen 2 host controller and programmable I/O.