I understand. When the issue occurs, is there any other odd responses or behavors else where in your circuit? Also, do the channels also get latched to the values you mentioned (Channels ch0-ch3, ch6,7 correspond 98D0; Channels ch3-ch5 meet B1A1; AUX channel respond 31A1;), no matter what the input was at the time? In other words, do the outputs latch at the input value the moment the issue occurs, or is the input at another voltage value than the one outputed? As you mentioned pin 35 is a Do Not Connect pin, the description states that that the node cannot be connected to anything and left to be floating. From this I infer that there possibly is an internal connection in this pin, and connecting it to anything could cause damage or malfunction. I would suggest to leave the pin floating as the datasheet states. Regards, Cynthia
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