Is the ISO1540 hot swappable? At the bottom of page 5 there is a VCC Undervoltage Lockout Threshold parameter. The datasheet does not provide a description of the state of the signals. I need to isolate an I2C device from the main I2C bus because this device can be switched on and off from a separate power source.
My configuration is as follows:
Side 1: I2C Compatible Device. This device is powered from VCC1.
Side 2: I2C bus with a single Master and multiple I2C devices. Both devices are powered from VCC2.
Theory of operation:
Side 2 of the I2C bus will normally be active with both the master and slave device powered from VCC2. The device on side 1 will initially be off. At some point in time, the device on side 1 will be switched on. I want to ensure the following:
1) When the device on side 1 is off, side 2 is unaffected.
2) When the device is switched on, the state of the I2C bus will not be affected by the transition.
Thanks!