The FT232RL is a USB to serial UART interface .

FT232RL

 Features

1. Single  chip  USB  to  asynchronous  serial  data transfer interface.
2. Entire  USB  protocol  handled  on  the  chip.  No USB specific firmware programming required.
3. Fully  integrated  1024  bit  EEPROM  storing device descriptors and CBUS I/O configuration.
4. Fully integrated USB termination resistors.
5. Fully  integrated  clock  generation  with  no external  crystal  required  plus  optional  clock output selection  enabling  a  glue-less  interface to external MCU or FPGA.
6. Data  transfer  rates  from 300  baud to 3  Mbaud(RS422, RS485, RS232 ) at TTL levels.
7. 128  byte  receive  buffer  and  256  byte  transmit buffer  utilising  buffer  smoothing  technology  to allow for high data throughput.