PL2303 USB to UART Converter

PL2303 USB to UART Converter View larger


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With this USB to serial converter, the connection of a development board, e.g. Arduino, to a PC becomes a children's game. The converter module is hardly larger than a standard USB stick and can therefore be used for space saving purposes. Right next to the USB connector, there's a pin strip with a total of 5 pins. This makes it possible to access a serial interface with TTL levels. The pencil bar is readily accessible and can e.g. can be wired quickly by a Dupont cable. The module also allows the power supply of the developer board with the choice of 3.3V or 5V. However, the output current at 3.3V is limited to a few mA. The converter module has an IC of the type Prolific PL2303HX. To protect the transducer module, the transducer module is enclosed by a transparent shrink tube.


  • Overcurrent protection with a 500 mA resetable fuse
  • Flexibile power options (5 V or 3.3 V)
  • TTL compatible I/O levels
VCCIOPower 3.3 V or 5 V selectable with jumper
GNDThe weight of the system
TXDThe Pin code of UART transmitter
RXDThe Pin code of the receiver UART
CTSSignal Clear to Send UART interface
RTSSignal Request to Send UART interface

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PL2303 USB to UART Converter

PL2303 USB to UART Converter

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