CH340G USB to TTL Converter Module (3.3V/5V)
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Prices updated: 13 Oct 2026
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About this product
A USB to TTL serial converter module built on the CH340G chip, used to connect TTL serial devices to a PC. It is commonly used for debugging, firmware updates on routers and serial communication with microcontrollers. Output levels of 3.3 V or 5 V are selected with a jumper, and 3.3 V and 5 V outputs can power small projects.
Specifications
- Chip
- CH340G
- Logic level
- 3.3 V or 5 V (selected by jumper)
- Power outputs
- 3.3 V and 5 V
- Supported operating systems
- Windows, Mac OS, Linux, Android
- Loopback test
- Short TX to RX with the shunt
Frequently asked questions
How do I wire it to a microcontroller?
Connect the module's TXD to the target's RX, the module's RXD to the target's TX, and GND to GND. Connect VCC only if you intend to power the target from the module.
How do I choose between 3.3 V and 5 V?
Place the jumper on the voltage setting that matches the logic level of your target device. Using 5 V logic with a 3.3 V device can damage it.
