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TCAN1043-Q1: The CANH and CANL pins of TCAN1043-Q1 can bear ±8KV of powered contact discharge ?

Went Cao
Genius 5550 points
Part Number: TCAN1043-Q1
Other Parts Discussed in Thread: STRIKE

Hi all

       The CANH and CANL pins of TCAN1043-Q1 can bear ±8KV of powered contact discharge ( IEC 61000-4-2 (150 pF, 330 Ω) )?

       When I take ＋8KV or -8KV ESD to CANH or CANL pins of the TCAN1043-Q1, the MCU of system will  be restart or halted, but when I change NXP TJA1043, it will be good.

       

  • 0
    TI__Guru 60222 points
    Went,

    I'm assuming the MCU of the system is connected to the TXD and RXD pins of the TCAN1043-Q1, is this correct? If so, can you probe these pins as the ESD strikes occur? I'm curious if some of strike is propagating through the device and causing a fast overvoltage event to the MCU. This isn't something that our devices should do since we're passed powered ESD testing though.

    Regards,
  • 0 in reply to Eric Hackett
    Genius 5550 points

    Hi Eric

          Thanks your reply. But I have two questions about your reply:

          1. You said the device passed powered ESD testing though, What is the powered ESD ? Is that ESD for the device supply power, not CANH or CANL pins ? And what is the standard about the powered ESD?

          2. In your reply, is that CANH or CANL pin of TCAN1043-Q1 can not bear ±8KV  powered contact discharge(The standard:  IEC 61000-4-2 (150 pF, 330 Ω)). Could you reply to me with Yes or No?

          Thanks

  • 0 in reply to Went Cao
    TI__Guru 60222 points

    Went,

    1. Powered ESD means the device is powered on and operating while ESD strikes are applied to test the performance. CANH and CANL are the pins struck, but the standard I'm referencing uses a different capacitor-resistor network than the one you've used, so it's not as relevant as I thought. The standard I'm referring to is SAE J2962

    2. The CANH and CANL pins can withstand strikes up to +/-15kV on an unpowered device according to the IEC 61000-4-2 standard. 

    Regards,

  • 0 in reply to Eric Hackett
    Genius 5550 points
    Hi, Eric
    Thanks for your quickly reply.
    1. Could you send to me the SAE J2962 standard document ? My email is went.cao@wpi-group.com
    2. You said it can ensure to withstand strikes up in unpowered standard, but it can't ensure withstand strikes up in powered standard with the IEC 61000-4-2 standard. Right?
  • 0 in reply to Went Cao
    TI__Guru 60222 points
    Went,

    I just sent over an email with the document and answers. I am going to close this thread and we can continue the conversation through email.

    Regards,