HID to Serial Port Chip CH9326


CH9326 is a driver-free chip for HID to serial port. CH9326 supports bi-directional data transmission, used to receive the serial port data, and according to the HID class device specification, package the data and upload it to computer through USB, or receive USB packets witch conform to HID class device from computer, and sent them from serial port. The VID, PID and various string descriptors of the chip can be configured by software.


  • Supports 12Mbps full-speed USB device interface, USB 2.0 compatible, built-in crystal oscillator.
  • Default serial communication baud rate is 9600bps, which supports multiple serial communication
    formats and common baud rate settings.
  • Supports 5V and 3.3V power supply voltages.
  • Supports configure VID, PID, and various USB string descriptors of the chip.
  • Supports configure default baud rate of the chip.
  • Complies with USB related specifications and HID device related specifications.
  • RoHS compliant SOP-16 lead-free package.


relation files

file name file content
CH341DS1.PDF CH341 datasheet, USB bus converter chip with multiple communication interfaces, such as USB to serial port/parallel port/printer port/I2C interface etc. Drivers support for Windows/Linux/Android/Mac, etc. The datasheet is the description of USB to serial port and printer port.
CH376DS1.PDF CH376 datasheet. Easy-to-use USB flash disk and SD card file management chip, supports host-slave USB applications, supports FAT32/FAT16/FAT12, supports SPI/8-bit parallel port/asynchronous serial port. MCU resource occupies less memory. This datasheet introduces USB flash disk and SD card file read/write and management.
CH340DS1.PDF CH340 datasheet, USB bus converter chip which converts USB to serial port, printer port, IrDA SIR etc. Integrated clock, supports various operating systems, chip information can be customized, this datasheet is about USB to serial port and USB to Infrared Adapter SIR.
CH9340DS.PDF CH9340 datasheet, USB CDC to single serial port, built-in crystal oscillator, supports built-in CDC driver in operating system.