Operates from 3V or 5V Supplies
H
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High
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Terminal Potentiometer. This is the high terminal of the potentiometer. It is not required that this terminal be connected to a potential greater than the L terminal. Voltage applied to the H terminal cannot exceed the power supply voltage, VCC, or go below ground
lz,楼上说的很清楚了,datasheet描述在此,你的本意是用数字电位器替代2和5之间的那个电阻,可惜器件参数不允许
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