one of my AA is experiencing some issues with the PCA9536. The polarity register starts wiht not default values.
I've doublechecked the POR, on the power off the device seems to be in spec, see below: (blue line is the VCC), the TOFF is 1.2s
On the power up VCC reaches the VPOR in 8.5ms and then from VPOR to nominal VCC (3.3V) it takes 4ms. So the total trise is higher than 10ms. It is agains DS suggestion.
Since the PCA9536 can work from VCC=2.3V , is it possible to say that the rise time from 0 to 2.3V is less than 10ms ?
Are there any time spec between VPOR a nominal VCC ?