Features:

1. Full speed USB device interface, conforms to USB Specification Version 2.0, only needs crystal and capacitance external.
2. Emulate standard serial interface, used to upgrade the former peripheral device, or add excess serial interface through USB.
3. Compatible with serial application program in a computer endpoint Windows operation system.
4. Hardware full duplex serial interface, set transceiver buffer, supports communication baud rate varies from 50bps to 2Mbps.
5. Supports common MODEM liaison signal RTS, DTR, DCD, RI, DSR and CTS.
6. Through adding level converter equipment to supply RS232, RS485, RS422 and another interface.
7. Supports IrDA criterion SIR infrared communication, supports baud rate varies from 2400bps to
   115200bps.
8. For it is through USB converts to the serial interface, only compatible with application layer not totally.
9. Software compatible with CH341, using the drive of CH341 directly.
10. Support 5V and 3.3V source voltage.
11. Supply SSOP-20 package without lead, compatible with RoHS