I have a question regarding the ESD diodes configuration of the LTC4303.I plan to use this component to isolate an I2C device from the main I2C bus (which has other slaves). In order to save energy in my system, the power supply of this I2C device will be cut off from time to time. The LTC4303 being connected to the same VDD, its power supply will also be cut off. However, the SDA/SCL lines will still be connected to the main I2C bus. The image below shows the configuration.
Generally, devices have ESD diodes between input pins and GND/VDD. Does the LTC4303 have also such diodes ?
Thank you for your help,Thomas
You can cut power to the LTC4303 and it won't disturb the bus. It won't parasitically power up with a high on the SDA or SCL pins.
The LTC4300A-2 or LTC4300A-3 may be a consideration.…
The LTC4300A-2 or LTC4300A-3 may be a consideration. You would have the VCC2 pin supplying the I2C slaves that you were looking to power-down.
thank you for the fast answer :-)I will also consider using the LTC4300A-x.