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[SN65HVDA1040A-Q1] Question about the input resistance deviation

Charles Park
Intellectual 1005 points
Other Parts Discussed in Thread: SN65HVDA1040A-Q1

Hello team,

My customer is SL Corp. Their end customer is HKMC.
My customer is using TJA1042T for their project.
I promoted SN65HVDA1040A-Q1 and HVDA533-Q1.
There is some question regarding the input resistance deviation.
Their end customer’s spec of this parameter is +/-2%.
I attached comparison file.

8802.Comparison of CAN.docx
Is the same value both the input resistance deviation and input resistance matching?
If not, could you let me know the input resistance deviation of our devices?

Thank you for your help in advance.

Best Regards,
Charles Park

  • 0
    TI__Mastermind 21831 points

    Hi Charles,

    The ISO11898 standard uses the term deviation, and we are using the term matching. They are the same thing like you said.

    The requirement in the ISO11898 standard is the 3% that you see listed in our datasheets. I have never seen any other customer with requirement like this. Do you know why HKMC has this requirement?

    Thanks,

    John

  • 0 in reply to John Griffith
    TI__Intellectual 1005 points

    Hello John,

    Thank you for your reply.
    I am sorry that I don’t know the reason.
    This is just HKMC’s requirement.
    HKMC has own specification which is tighten than the global standards.

    Best Regards,
    Charles Park

  • 0 in reply to Charles Park
    TI__Mastermind 21831 points

    Hi Charles,

    I'd be interested to know if you are able to find out. This is not something we have ever seen any push for before from any customers.

    I went and looked up the ATE test data that was used when the datasheet limits were decided on and from the 30 units that were tested across temperature the matching is better than 2% for all units. We would not be able to guarantee anything without working with the characterization team but I thought this was good information for you to share with the customer.

    Can you share some details on the opportunity (size, production date, Tier 1)?

    Thanks,

    John

  • 0 in reply to John Griffith
    TI__Intellectual 1005 points

    Hello John,

    I am sorry for confusing.
    HKMC’s spec of the input resistance deviation is +/-1% (totally Max 2%).
    As I know, the dominant suppliers of CAN transceiver are NXP and Infineon for HKMC.
    Now my customer is using NXP devices for CAN transceiver.
    I am trying to kick out our competitors. It is difficult for me to persuade HKMC and SL Corp. 

    Here is the business information.
    SL Corp is Tier1 company.
    The target application is the gear knob for HKMC. The volume is 200Ku/yr.
    The target production date is 4Q16.

    Thank you.

    Best Regards,
    Charles Park

  • 0 in reply to Charles Park
    TI__Mastermind 21831 points

    Hi Charles,

    With a ±1% requirement our CPKL goes from over 6 to just over 2 (automotive requires at least 2). So our characterization data shows that we may be able to meet this as well.

    I would hate to lose this socket because of not being aggressive enough on the specifications in the datasheet.

    John