The CH342 by ETC is a USB to Dual Serial Ports. Below is the official datasheet preview.
| Part number | CH342 |
|---|---|
| Manufacturer | ETC |
| File Size | 195.81 KB |
| Description | USB to Dual Serial Ports |
| Datasheet |
 CH342-ETC.pdf
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Power supply voltage input, requires an external decoupling capacitor I/O Power supply voltage input, requires an external decoupling capacitor Ground, connected to ground of USB bus directly Internal power regulator output and core and USB power input, When VDD5 voltage is less than 3.6V, connect VDD5 to input the external power supply, an external power decoupling capacitor is required to be connected when the VDD5 voltage is greater than 3.6V Input of external reset, active low, built-in pull
📁 CH342 Similar Datasheet
