FT232RL is a USB to UART Bridge IC from FTDI in SSOP-28 Package. This IC comes with internal oscillator and built in EEPROM for user define device ID and product description string. FT232RL makes an virtual COM port in computer and outputs all the serial (modem signals) in TTL level. This IC can be hand soldered. FT232R is a USB to serial UART interface device which simplifies USB to serial designs and reduces external component count by fully integrating an external EEPROM, USB termination resistors and an integrated clock circuit which requires no external crystal, into the device. It has been designed to operate efficiently with a USB host controller by using as little as possible of the total USB bandwidth available.