Note to quantity customers: 1000 Tested Chips in a Reel. Higher quantity discounts are available through contact with our Sales Department. The FTDI 232BM USB to Serial UART interface chip converts USB to serial data (I/O's at TTL levels). All USB protocols are handled in the chip, so no knowledge of USB is required. The 232BM is entirely state machine based and no firmware is required. Supports baud rates of up to 3 MBit / second.
Resources: FTDI Schematics (Off Site) FTDI Chip Drivers (Off Site)