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5V design what do you use for i2c pullup resistors?

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alank2:
It seems like I've used 1K or 2K, but not sure which is best, or something else - what do you use?

oPossum:
Best is going to be application dependent. My default values for 400 kHz or less on a PCB are 4k7 for 5V and 2k2 for 3V3.

alank2:
Sorry, I'm thinking 1MHz.

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