The FTDI Chip FT230X and FT234XD are Ful Speed USB to basic serial UART interface devices. The FT231X is a Full Speed USB to Full Handshake UART interface.
They have a fully integrated MTP memory and an integrated clock circuit which requires no external crystal which helps to reduce external component count.
Capable of operating up to 3 MBaud, with low power consumption (8 mA), all USB to UART devices operate efficiently with USB host controllers. They use as little bandwidth as possible.
The FT230X includes the complete FT-X series feature set and enables USB to be added into a system design quickly and easily over a UART interface.

- Fully integrated MTP memory, clock generation, AVCC filtering, Power-On Reset (POR) and LDO regulators.
- Configurable CBUS I/O Pin Options.
- Asynchronous and Synchronous Bit Bang Modes.
- Operates at between +3.3 V and +5.25 V. A nominal operational mode current of 8 mA and a nominal USB suspend mode current of 125 μA.