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BQ27Z561: I2C powr level

Part Number: BQ27Z561

hello,

we want to know what is the I2C interface level of gauge IC ?

because our  system I2C level is 3.3V, but your datasheet shows us that power level between 0~6V.

if that, what level do you accept in your gauge IC side? 3.3V or VBAT ?

best regards

Vincent