From: [email protected] [mailto:[email protected]] On Behalf Of Marcelo Varanda via Groups.Io
Sent: Saturday, March 28, 2020 5:31 PM
To: [email protected]
Subject: Re: [VentilatorDevelopers] First look, PCB

?

I2C drivers are open drain (or Open collector) as many slaves and master drive the data signal.
pullups are required (maybe interval are good enough). I would guess that most I2C interfaces work fine with either 3v3 or 5V.
level translator in a shared bus could be could be difficult to implement as all ends drive down the signal (master and all slaves).