I am working on a design that uses the TAS5731M with an ODM. They are indicating that they need bus I2C bus issolation, because we plan to power down the TAS5731M while we maintain the bus for other ICs. I have never used this particular part before, but highly doubt that it isn't high-z when in reset/unpowered. Can anyone confirm if the device is or is not high-z on the bus when there is no power, and reset and PDN are both low?