| Key Features • PCI Express fanout switch with x1 upstream port and three x1 downstream ports • Fully compliant with PCI Express Base Specification, Rev. 1.1 • Cut-through architecture • Support for D1, D2, D3hot, and D3cold • Active State Power Management (ASPM) using both L0s and L1 • Low-power PCI Express transmitter mode (pre-emphasis disabled) • Integrated AUX power switch drains VAUX power only when main power is off • Integrated hot-plug support • Integrated REFCLK buffers for switch downstream ports • Advanced Error Reporting to assist with system debug tools • 3.3-V multifunction I/O pins (e.g., for hot-plug status and control, or for general purpose I/Os) |