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ISO1042: ISO1042QDWVQ1 Hot plug/hot swap

Anusha M U
Prodigy 105 points
Part Number: ISO1042

Tool/software:

In the following schematic during the hot swap, we are facing the data communication has stopped between the CAN nodes. How to tackle the hot swap issues 

or else is their IC can support Hot swapping.

  • 0
    TI__Expert 7465 points

    Hi Anusha,

    Thanks for reaching out..

    Can you share more details on what happens when you say "communication stopped between CAN Nodes" : Is the ISO1042 getting damaged?

    If the device is getting damaged then it can be because of Voltage Overshoots on Supply VCC1/VCC2 while hot plugging. The Series Inductance in Schematics only make the overshoot worse. Refer this article for handling Supply overshoots while hot plugging: https://www.ti.com/lit/an/sluaal8/sluaal8.pdf?ts=1748249014904&ref_url=https%253A%252F%252Fwww.google.com%252F

    From a communication protocol perspective, CAN usually does not support interpreting CAN frames mid-frame. In order for proper communication to take place, you would most likely need to implement some sort of hot-plugging software capability. The standard CAN protocol does not support hot-plugging.

    Regards
    Varun