According to LT1236 datasheet, NC pin is connected internally. Where NC pin is connected internally ? How much the resistance is between NC and GND ? The customer measured it. One is 1.82kohm another one is only 1.57ohm. What's happened the IC ?
As additional info, there is a capacitor between NC and GND on the pcb because they used MAX6250 on their old version pcb instead of LT1236. Does the capacitor cause any problem ?
We have been reviewing this query for the last few days. We are awaiting some more information from the design team before we can answer. We will have an answer within the next few days for you. Thank you for your patience.