USB bus interface chip: CH374 - NanjingQinhengMicroelectronics
1PCS USB peripheral controller IC HVQFN-56 ISP1582BS ISP1582BSUM | eBay
FTDI - USB
MAX3420 - Maxim USB Peripheral Controller - The Lab Book Pages
PL2551 Hi-Speed USB General Purpose Device Controller | Prolific USA | IC Design & Manufacturing
Usb Peripheral Controller Ic 80-pin Lfqfp R8a66593 R8a66593fp - Buy R8a66593fp,Electronic Components,Usb Peripheral Controller Ic Product on Alibaba.com
TPS2540 data sheet, product information and support | TI.com