CH340 USB to TTl converter module


A low cost USB to TTL module based on CH340 chip. An alternative to FTDI USB serial Chips. The Module supports both 3.3V and 5V levels by a jumper selection. The module supports 50bps to 2Mbps baudrates.

3 in stock



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3 in stock


CH340 module / USB switch TTL / USB transfer RS232 / exceed PL2303 / STC Downloader / 9 Brush board STC official download chip.


  • Programming of Arduino Pro Mini with Automatic RESET through DTR pin
  • Programming of Microcontrollers that can be programmed using serial boot loaders at 3.3V or 5.0V logic levels
  • Burn write STC MCU,NXP MCU,renesas MCU,NEC MCU
  • Data exchange between microcontroller and Desktop or Laptop Computers
  • Connection with GPS Devices
  • Connection with various external Phones, or modems, GSM Modules
  • All other applications requiring USB/Serial/TTL interface.
  • Router,HDD,ADSL,broad band modem firmware upgrade
  • Cellphone,XBOX360,GPS serial communication,vehicle inspection and test, dvd flash and so on
  • Simple UART communication,commonly used UART debugging tools in supper terminal
  • USB signal transferred to TTL signal,may be used by electronic enthusiasts
  • Two data transmission indicator can monitor data transfer status in real time
  • 3.3V and 5V power supply interface,easy for the DDWRT of different voltage system that need power.

Operating Instructions

  • To support 3.3V LVCMOS or LVTTL levels insert Jumper between VCC and 3.3V
  • To support 5V CMOS or TTL levels insert Jumper between VCC and 5V

Supported OS

  • Windows 7, Windows 8, Windows 10
  • Macintosh OSX (v3.1)
  • Linux 3.x.x, Linux 2.6.x
  • Android


  • Implements full v2.0 USB protocol
  • On board status indicator lights for RX and TX and Power
  • Supported Baudrates: 50,75,100,110,134.5,150,300,600,900,1200,1800,2400,3600,4800,9600,14400,19200,28800, 33600,38400, 56000,57600,76800,115200,128000,153600,230400,460800,921600,1500000,2000000


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