On a i2c bus I have an AD9524 which is powered OFF when all the other devices on the i2c bus are ON.
The pull-up resistors on the i2c bus are 3K.
On the i2c clock line I measure 3.3V after power on but on the i2c data line I measure only 1.5V. If I disconnect the AD9524 (which doesn't have power) from the data line than I measure 3.3V on the i2c data line.
What could be the issue?
In order to turn ON the power to the AD9524 I need the i2c bus to work properly with levels up to 3.3V.