Hi, I'd like to use the DRV5032 in a magnetic keypad. Just like a normal keypad, the switches would be muxed into an MxN array, where you'd drive the first column, and the read the rows, drive the next column, and then read the rows, etc.
The question I have is whether or not an DRV5032 with an open-drain output could have 3.3V applied to the output while the power to the part is off. If the part functioned as shown in the figure 8.2 diagram, then the output mosfet would be fine. And a discrete implementation of the circuit would be fine. But of course there can be parasitic diodes that will result in leakage back to the DRV5032 core. Thus, my question.
The absolute max ratings suggest this cannot be done. But it's such a useful mode of operation for an open drain circuit I thought I'd ask.
