Hi there
I have some questions about TCA9545A
1.May I ask how to measure the RON,follow is the answer on your E2E forum,Is it like this?can you show me a diagram?
[Bobby] I imagine you may need to place a small resistor before the SDA/SCL and after SDn/SCn and adjust the resistance such that you pull 15mA/10mA while the Vo (seen by the SDn/SCn is 0.4V while SDA/SCL is tied to Vcc through that small resistor). Then you would take the voltage drop across the channel and divide by 15mA/10mA.
2.If sda input low level VIn is 200MV ,VOL = pass gate dropout +200MV , Is It right?
3. Is the pass-gate ON when transfer low level only,off when transfer high level?