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HD3SS3220: Pull up voltage for INT_N pin

Part Number: HD3SS3220

Hi team,

When I use HD3SS3220 in I2C mode and use 1.8V for I2C pull up voltage,

what voltage can I use for pull up voltage of INT_N pin? Is it no problem to use 1.8V pull up voltage for INT_N pin? 

Regards,

Saito