Features: Single-chip USB to asynchronous serial data transfer interface The entire USB protocol is handled on the chip No USB-specific firmware programming is required Fully integrated 1024-bit EEPROM storing device descriptors and CBUS I/O configuration Fully integrated USB termination resistors Fully integrated clock generation with no external crystal required plus optional clock output selection enabling a glue-less interface to external MCU or FPGA Data transfer rates from 300 baud to 3 Mbaud(RS422, RS485, RS232 ) at TTL levels 128-byte receive buffer and 256-byte transmit buffer utilizing buffer smoothing technology to allow for high data throughput Configurable CBUS I/O pins Transmit and receive LED drive signals UART interface support for 7 or 8 data bits, 1 or 2-stop bits, and odd / even / mark/space/ no parity FIFO receives and transmits buffers for high data throughput Synchronous and asynchronous bit bang interface options with RD and WR strobes The device is supplied pre-programmed with a unique USB serial number. Supports bus-powered, self-powered, and high-power bus-powered USB configurations Integrated +3.3V level converter for USB I/O Integrated level converter on UART and CBUS for interfacing between +1.8V and +5V logic True 5V/3.3V/2.8V/1.8V CMOS drive output and TTL input Configurable I/O pin output drive strength Integrated power-on-reset circuit Fully integrated AVCC supply filtering - no external filtering required UART signal inversion option +3.3V (using external oscillator) to +5.25V(internal oscillator) Single Supply Operation Low operating and USB suspend current Low USB bandwidth consumption UHCI/OHCI/EHCI host controller is compatible USB 2.0 Full Speed compatible -40°C to 85°C extended operating temperature range Available in compact Pb-free 28 Pin SSOP and QFN-32 packages (both RoHS compliant)

Fully integrated 1024 bit EEPROM storing device descriptors and CBUS I/O configuration. Fully integrated USB termination resistors. Single chip USB to asynchronous serial data transfer interface. Entire USB protocol handled on the chip. No USB specific firmware programming required. In addition, it is equipped with 3.3V voltage output and 5V voltage output options, convenient for multipurpose use. USB power supply is provided with overcurrent protection, and 500MA self-recovery fuse is added to protect your computer and equipment, with more stable performance. In addition to using the best FT232RL chip of USB2.0, the module also puts the output ports TX and RX at the tail, which is more convenient for practical operation, and is equipped with VCC and GND for output, which is more universal.