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MAX3221: Dout管脚输出为0

Part Number: MAX3221

大家好

我按照规格书推荐电路图测试,芯片12和16管脚接3.3V电压,当芯片8和13管脚接入电脑232串口时,输出电压正常,输出命令也正常。

把电脑232串口断开,芯片Dout输出电压为0

请问是什么问题?

谢谢!

  • 您好,

    按照下面真值表,Dout 随DIN变化,在Dout输出电压0V时,您可以同时测量DIN的信号吗?DIN的信号是怎样的?