Hello I2C team!
Watanabe-san sent the following question to me regarding the TCA9548, and I didn't want to just point him to E2E since it would likely delay his answer by a full day. I made a few edits (in brackets) for clarity.
-Emrys
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I have [a] question about the Vpath in page21 of TCA9548 datasheet.
What is the meaning of this “Vpath”.
In this case, master power supply is 5V and slave power suppl[ies] are 2.7V and 3.3V. It seems Vpath(max) is 2.7V and possible VCC is 4V.
I guess this path transistor’s gate source voltage threshold Vth(on) has 1.3V in this case.
If VCC=4V, this transistor can be off and it can act translator but if VCC>4V, this transistor is always on so it can’t act [like a] translator.
I am not sure my guess is correct or not. Would you help me [understand] how TCA9548 is working and Vpath meaning?
