PEX8747-CA80FBC G

• Multi-Root PCI Express Gen 3 Switch
• Expands One Upstream PCIe Link Into Multiple Downstream Ports
• Supports More Than One Host Root Complex
• 575-Pin HFCBGA Package
• RoHS Compliant

The Broadcom PEX8747-CA80FBC G is a multi-root PCI Express Gen 3 switch supplied in a 575-pin HFCBGA package and is RoHS compliant. A PCIe switch expands a single upstream link into multiple downstream ports, fanning out the host's available lanes to more endpoints than the root complex provides directly. Multi-root support means the PEX8747-CA80FBC G can present its downstream devices to more than one host or root complex rather than being tied to a single one.

PCIe switches are used when a system has more PCIe endpoints than the CPU has lanes, which is the normal situation in multi-GPU workstations, GPU and accelerator carrier boards, NVMe storage backplanes, and dense add-in cards. Multi-root capability additionally allows shared access to a pool of downstream devices from separate hosts, which is how storage and accelerator resources get shared in redundant or multi-node chassis. Typical designs include GPU compute risers, capture and video processing cards, RAID and HBA controllers, and embedded carrier boards. Buyers are server, workstation, storage, and embedded system OEMs and board-level design houses, including teams sustaining Gen 3-era platforms where the switch is the specified part.