CH340G USB转串口，推出时间最早，应用最广 SOP16 CH340C USB转串口，内置晶振，引脚兼容CH340G SOP16 CH340E USB转串口，内置晶振，超小封装 MSOP10 CH340B USB转串口，内置晶振和EEPROM，引脚兼容CH340G SOP16 CH340T USB转串口 SSOP20 CH341T USB转串口、IIC SSOP20 CH341H USB转SPI SSOP20 CH341A 香港vps USB转串口、并口、IIC和SPI SOP28 CH340/CH341系列产品作为USB转串口时使用同一个驱动程序：CH341SER.EXE CH340G/CH340C/CH340B参考如下电路(见资料中CH340G9T.SCH)：
