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.

7 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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