VCCA, VCCB and OE pins tied together on TCA9406

Hello Evan,
Can you please elaborate on what you are trying to accomplish. What is your application? Are you doing level translating or are you trying to buffer you signals? Any diagrams or more detailed explanation of the question you are trying to answer would be helpful. Why would you tie Vcca and Vccb together????
-Sincerely,
-Francis Houde

Hi Francis,
Thank you for your prompt reply. My application has a master and two slave uCs communicating via I2C. The slaves are 3.3V batteries (in parallel) and supply power to the master. Each slave is connected to the bus through a connector. When a slave is detached from the bus while the other slave is still connected, a current leakage above regulated limits exists on the SDA and SCL pins of the connector, because of the pull-up resistors.
What I am trying to do, is to use a TCA9406 for each slave and set the I2C bus on its connector high impedance, every time the slave is disconnected. Also, using the internal 10K pull-up resistors of your IC, which are disabled when the IC is disabled, I don't have to use external (leaking) pull-up resistors. For some reasons, each TCA9406 has to be powered from its own slave (battery) when it is connected, which requires VCCA, VCCB and OE to be tied together and powered when the battery is connected. I understand that a soft starter of the OE pin could help, but I'd prefer to be my last option.
My question is what happens to the I2C bus and to your IC if these pin are tied together and powered up or down. I hope my explanation helps.

Thank you,
Evan