Hi,
use a comparator like the MAX9140. And two resistors to set your desired threshold voltage.
Klaus
btw:
What logic device generates 0.8V low level?
Maybe a simple pull down resistor could ensure proper low level.
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Hi,
I2C signals are bidirectional! Therefore you can´t use a typical logic gate, nor can you use the comparator.
I assume (I didn´t check) the P82B96 I2C bus buffer works within specifications. Here you need to read I2C specifications instead of logic families specifications.
Klaus