Hello, ty for your answer. That was my first plan, nevertheless i read that about the self-test on the datasheet p.11
"Never expose the ST pin to voltages greater than VS + 0.3 V.
If this cannot be guaranteed due to the system design (for
instance, if there are multiple supply voltages), then a low
VF clamping diode between ST and VS is recommended"
To make the system work, i need Vs = 3,3V.
So i just took an output and sent 0,3V to Self-test pin while i was sending 3,3V to Vs pin
What would you have done?
Thank you !
Anthony