The FT8U100AX is not recommended for new designs -
FTDI Support before implementing a design based on this IC.
The FT8U100AX multi-function USB 1.1 hub
controller IC is a popular choice for USB docking stations and other
products requiring multiple legacy ports. Features include inbuilt
RS232 serial, PS/2 mouse and keyboard ports combined with up to 7 other
USB hub ports which can be used for USB expansion or to provide further
legacy ports in conjunction with other USB legacy support ICs. The
FT8U100AX is supplied in a 100LD QFP package.