王达业

CH340G solution verification board

Overview

The USB-to-serial port module controlled by CH340G is small in size and uses a three-wire serial port (GND TXD RXD) to transmit data. The driver is easy to install and has high compatibility. The module has a 3.3V output and can drive devices that can only work at the 3.3V level. The microcontroller (the driving performance is not high, up to 500ma) has a 500ma PTC self-recovery fuse to avoid property losses caused by short circuits. However, one disadvantage is that the CH340G requires an external crystal oscillator and capacitor, while the CH340C does not need it and does not want the outside world. Crystal oscillator friends can take a look at my C340C solution verification board O

Design Files

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Update:2025-07-18 00:18:45

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