usb转ttl输出3.3V

USB转TTL串口模块可以输出3.3V电压。这是因为在模块的设计中，串口的TXD引脚输出的电压是3.3V，并且通过内部的电路设计，可以确保输出的电压稳定在3.3V。
另外，关于CH340G芯片，它内置了USB上拉电阻，可以直接连接到USB总线上，并且支持USB2.0全速模式。所以，通过USB转TTL串口模块连接到电脑的USB端口时，它可以直接输出3.3V的电压。 <span class="em">1</span><span class="em">2</span><span class="em">3</span>
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