USB4 external NVMe SSD enclosure PCB targeting an ASM2464PDX-class USB4 40 Gbps device controller with PCIe Gen4 x4 downstream M.2 NVMe interface, USB-C upstream port, power management, ESD protection, and controlled-impedance layout constraints.

PCIe Gen4 x16 Subsystem for ACCP 2U Blade: Integrated Switch, Lane Bifurcation, and SRNS Refclk with 85Ω Impedance Routing