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你好，
对于下图中MIN=20+0.1Cb的计算，请教下这个Cb怎么计算，谢谢！
您好，
总线总电容Cb是线路连接形成的电容和管脚的总电容。PCF8575的SCL，SDA管脚电容是7pF，走线也有，这个电容的计算基本上很难，要看走线和制板工艺，下面帖子中说了一些计算事项，可以参考。不要试图获得准确的电容值，只要确保在使用规格范围内就好了。
https://e2e.ti.com/support/sensors-group/sensors/f/sensors-forum/996198/tmp175-q1-how-to-calculate-the-bus-capacitance-and-maximum-number-of-temperature-sensor-that-can-be-connected-with-i2c?tisearch=e2e-sitesearch&keymatch=How%2520to%2520calculate%2520I2C%2520bus%2520capacitance#
