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by Misiu
Mon Oct 14, 2019 8:09 pm
Forum: Automation, sensing and robotics
Topic: DS18B20 5V external power with 3V3 dataline
Replies: 9
Views: 5147

Re: DS18B20 5V external power with 3V3 dataline

I asked the same question to the manufacturer. They replied: Yes, you can make VDD = 5V and Vpullup = 3.3V. The Data line (DQ) is open-drain so it can only go as high as the Vpullup voltage. So it seems to be safe to connect the VDD of the DS18B20 to +5V and still keep the dataline at max 3V3 for t...

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