We created a circuit with diode array for ESD protection PN: IP4283CZ10-TBR (MFR: Nexperia)
We afraid that this connection might explain some problems we see in our samples, for example- one PCB didn't communicate with UART until we removed the part and another circuit failed during first watchdog test (again, until we removed this part).
In the datasheet all I could find that is related to the N.C pins was this line that mention that the capcitance between N.C pin to signal pin is 0.07pF (sorry, can't upload another image)
Correct me if I'm wrong, but it doesn't say much (just that the pins are seperated using small value CAP, nothing about not short between them).
Hope you could help me understand if this what is causing the problem or is it something else. We also use another 3 identical diodes arrays with same "connection problem", but they seem to work fine (Connected to RS422 RX,TX and Debugger lines)
The debugger we are using is J-LINK (using JTAG communication).