您好 ，我现在使用CD74HC4051做多路模拟输入ADC检测。
芯片供电3.3V，发现当一路输入上拉10K到5V后，模拟切换开关的输出公共端电压变成4V。此时，切换检测不准（比实际电位要高）！
请问这是什么原因？
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模拟多路复用开关cd74HC4051 供电3.3V 一路输入上拉5V后输出引脚电位为什么变高（没有切换到上拉的那一路）
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