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3.3v I2C Convertor to 5v I2C

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dsMasoud

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i2c 3.3v 5v

I'm trying to make a development board for xc3s400 like XILINX SPARTAN-3 starter kit but it has not LCD interface so i decided to add this feature.
in elektor magazine there was a project about making a development board for altera fpja which used the following circuit for LCD interface with I2C:


my questions are :
1-how this circuit work
2-is it possible to replace FDV301N with 2N7000 ?

best regards
 

i2c 5v 3.3v

read the application note from Philips/NXP for a detailed description:
**broken link removed**
 

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