CH340G用5V供电时，串口的电压是5V还是3.3V?

flywinder

CH340G用5V供电时，串口的电压是5V还是3.3V?
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超級狗

VCC = 5V
9 U# A9 @/ {* }; n) m- L. LV3 doesn’t connect to VCC.
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VCC = 3.3V
V3 connects to VCC.
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超級狗

High Output Voltage = VCC-0.5 V Minimum
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, [# ^% M2 `4 t6 k, l% G- W請參照這份 Datashit！
http://cdn2.boxtec.ch/pub/diverse/ch340g-datasheet.pdf
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超級狗

V3
. }5 B3 F% l( _. cConnects of VCC to input outside power while 3.3V, connects of 0.01uF decoupling capacitance outside while 5V.
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* @- c+ }! U+ O一看就知道是菜英文寫的芯片規格書。

松哥无敌

  版主厉害

wp053341

最近一段时间，这个芯片供货好像不足，楼主如果用量不大的话，还是得考虑下