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TCAN1043N-Q1: HBM ESD Ratings

Eileen Hu
Intellectual 1760 points

Part Number: TCAN1043N-Q1
Other Parts Discussed in Thread: TCAN1043-Q1, , TCAN1043, ESD2CAN24

Tool/software:

Hi team,

I am promoting TCAN1043N-Q1 to the customer to replace TCAN1043-Q1. I would like to know why the HBM ESD rating of TCAN1043N (±8kV) is much lower than that of TCAN1043 (±16kV). Is this data accurate? Whether this value meets the requirements in the application of the automotive headlights?

Thank you

Eileen

  • 0
    TI__Mastermind 27342 points

    Hi Eileen,

    Those HBM ratings are indeed correct. There are a variety of reasons for this, but the main reason is that HBM is not the leading ESD rating that customers look for in a CAN transceiver. HBM is a much weaker ESD testing standard, whereas IEC 61000-4-2 and SAE J2962-2 are much more robust ESD tests.  This E2E post explains it well:  Electrostatic discharge: Human Body Model versus IEC61000-4-2 

    Note that the SAE J2962-2 is related to the IEC 6100-4-2 standard, but specifically designed for automotive environments.

    TCAN1043N-Q1 is only rated up to 8kV HBM on CANH/L pins, but it may likely survive higher strikes than that since it is rated up to the same SAE J2962-2 powered ESD ratings as the TCAN1043-Q1. 

    Eileen Hu said:
    Whether this value meets the requirements in the application of the automotive headlights?

    This is defined by the Tier 1 or OEM. Please consult your customer for this information. Customers typically include external ESD protection anyway. If so, we recommend our ESD2CAN24 ESD diode. Generally the internal protection included in TCAN1043N is adequate however. 

    Best,

    Ethan