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I2C devices and Level Shifters

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MikeAG

Joined Dec 13, 2017
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Hello all,

I would like to ask for some help in a project I am currently developing. I am doing a device with about 4 to 6 sensors (I2C capable, 1.8V) and 3 other I2C 3.3V devices. I have on the I2C bus line one resistor for SCL line at 4.7kOhm and another for SDA line at 4.7kOhm.

My question is: Do I need a level shifter for each and every single one of the sensors and devices? Or can I only use one level shifter for all the devices?
 
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