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CDCE913-Q1:About OTP writing products

satoru majima
Prodigy 80 points
Part Number: CDCE913-Q1
Other Parts Discussed in Thread: CDCE913, LMK3H0102,

I am receiving a delivery of a product with OTP written at your company, but is there any risk of the product being delivered with incorrect OTP writing?
Also, please tell me the reason if there is no risk.
Also, is it possible to distinguish between OTP written products and standard products by checking the markings on the surface of the parts?

  • 0
    TI__Genius 13920 points

    Satoru-san,

    Is this with relation to the CDCE913, or the LMK3H0102? The CDCE913 is an EEPROM device, and has an EELOCK bit set to '1' to distinguish that the EEPROM has been locked. The top marking will not differ unless this is a spin for a specific customer,

    Conversely, the LMK3H0102 has OTP programmed by TI, and is always programmed and not writeable.

    Thanks,

    Kadeem

  • 0 in reply to Kadeem Samuel
    Prodigy 80 points

    Mr. Gadeem
    Thank you for your reply.

    This question concerns a part (CDCE913QE1PWRQ1) that is shipped with our company's exclusive settings written to the EEPROM at T.I.'s factory.

    Is there any risk that your company will ship the product to us with incorrect settings written in the EEPROM?

    Also, if your answer is that there is no such risk, could you please tell me the reason why there is no such risk?

  • 0 in reply to satoru majima
    TI__Genius 13920 points

    Satoru-san,

    When we program an EEPROM part, there is a readback step that is performed after programming to ensure that the EEPROM contents match with the programmed value.

    If the readback test is not passed, then the part is screened out and is not shipped. This minimizes the risk. The only way that there could be an issue is if the settings written into the device are not correct in the first place, or if an EEPROM bit is very marginal. Screening is done to filter bits that do not have enough margin.

    Thanks,
    Kadeem

  • 0 in reply to Kadeem Samuel
    Prodigy 80 points

    Mr. Gadeem
    Thank you for your reply.
    Could you please provide a little more details about what kind of situation you mean by "when the number of EEPROM bits is very small" in your answer?
    For example, what if the amount written to EEPROM is very small?

  • 0 in reply to satoru majima
    TI__Genius 13920 points

    Satoru-san,

    The entire EEPROM contents is written each time that the EEPROM is programmed. I believe that you are referring to my marginal content. It is possible for a bit of the EEPROM be weak, in that the charge is not held properly. The readback test lets us know if the bit is not holding charge correctly, as the bit will not match the expected value on readback. If this is the case, the part is screened out.

    Otherwise, the only risk of the incorrect EEPROM/register contents is if the programmed configuration itself is incorrect.
    Thanks,

    Kadeem

  • 0
    Prodigy 80 points

    Mr. Gadeem
    Thank you for your reply.

    I have a question regarding a part (CDCE913QE1PWRQ1) that is shipped with our own settings written in the EEPROM at T.I.'s factory.Will it be engraved on the surface of the part to distinguish it from the standard product?

  • 0 in reply to satoru majima
    TI__Genius 13920 points

    Satoru-san,

    I will check on this and provide an update tomorrow (PST), if not later today.

    Thanks,

    Kadeem

  • 0 in reply to Kadeem Samuel
    TI__Genius 13920 points

    Satoru-san,

    The top marking is different between custom EEPROM spins of the CDCE913 devices.

    Thanks,
    Kadeem

  • 0 in reply to Kadeem Samuel
    Prodigy 80 points

    Mr. Kadeem
    Thank you for your reply.

    Please tell me what is printed on the device surface of the standard product CDCE913-Q1 and our dedicated EEPROM writing product CDCE913QE1PWRQ1.
    I would like to see if I can see the difference in printing by looking at the surface of the part.

  • 0 in reply to satoru majima
    TI__Genius 13920 points

    Satoru-san,

    The CDCE913-Q1 is marked with CE913Q on the package, I will find out the marking for the dedicated spin and let you know. Expect a response by Friday (PST) at the latest.

    Thanks,

    Kadeem

  • +1 in reply to Kadeem Samuel
    TI__Genius 13920 points

    Satoru-san,

    The top marking for the custom part is 913QE1.

    Thanks,

    Kadeem