CH343 USB supports 1.8V, 2.5V, 3.3V, 5V IO voltages

CH340 USB to Serial Chips are very popular but only supports 5V or 3.3V IO Levels. The new CH343 supports 1.8V, 2.5V, 3.3V, and 5V IO voltage! On top of that it can do 6 Mbps Baud Rate, which is 3x that of CH340.

The 5 other impactful features of CH343 are:

1. Integrated EEPROM to configure chip parameters rather than relying on an external one

2. Integrated 12 MHz clock, so no external crystal required

3. Integrated Unique ID (USB Serial Number)

4. Automatic Identification & setting of communication baud rate (below 115200bps)

5. Comes in 3 packages- QFN16, SOP16, and ESSOP10

Datasheet is here:

Quick comparison chart :

Chip Price - Under $1 in single units, or around 55 cents per unit for 100+ orders

Where to buy the chip? -

Want to buy as a module? -

Drivers & Configuration tools can be found here:

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