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TCA9535驱动LED

Other Parts Discussed in Thread: TCA9535, TCA6416

大家好!有个问题请教一下,我用单片机IIC控制TCA9535,TCA9535控制LED。单片机使用的是3.3伏电源,LED使用5伏电源,TCA9535使用3.3伏电源。现在的问题是当TCA9535输出高电平时,LED是否也是点亮的?原理图如下: