I am working on a project that uses the Microchip HV5623K7-G Serial-to-Parallel converter. As part of the design process I need to determine what would happen if the board I am designing is plugged in backwards. The details for this are not important for the question, however. My question is in regards to the "Data Out" of the device. I see in the datasheet (http://ww1.microchip.com/downloads/en/DeviceDoc/hv5623.pdf) that the Data Out is set up like this:
However, I do not have any information about the output FETs, and I can't find anything in the datasheet. On my board, if plugged in backwards the worst case scenario would be that I would have an output of another board trying to drive the Data Output of the HV5623. If this happens, I need to know how much damage it would do, and how to prevent it. I don't know the maximum current or reverse voltage, both of which would help. If I can find these, I will be able to prepare for the worst case. Are these values available anywhere? I can't seem to find a simple "Tech Support" email address on the Microchip website, so contacting them would be difficult for me.
So, to be clear, my questions are as follows:
- What is the maximum reverse current the Data Output of the HV5623 can stand (current flowing INTO the output) before being damaged
- What is the maximum reverse breakdown voltage of the Data Output on the HV5623?
The most important one would be the first--the maximum reverse current. The voltage should be around 5V so I'm not too worried about that.