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LDC2112: I2C Interface max. Low Level

Part Number: LDC2112

Hello everybody,

according to datasheet the I2C-Interface of the LDC2112 allows an Input low voltage of 0.3xVDD, so 0.3x1.8V=0.54V.

Is this the min voltage to recognize a low level?

How high can the voltage level rise and the device still recognize it as low level? Still recognize a low level at for example 0.8V?

Best regards, Alexander