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TLE2064: Electrical differences of TLE2064IDR device by date code

Glenn Brown
Prodigy 40 points

Part Number: TLE2064

We have TLE2064IDR devices failing our In-Circuit (ICT) test and I believe it has to do with changes to the die and/or bond wires related to a PCN.  The failing devices have the following markings: Top-side = TI51CKJ5K and TLE2064I; Bottom-side = KCP01 and KCQ01

Can you tell me how to read the date codes for the TLE2064IDR devices?

Also, the PCN from December 5, 2023 PCN# 20231130004.1 states that there is no anticipated form, fit or function changes.  With the die being changed and the bond wire diameter changing from 0.96mil to 0.8mil, I don't see how there wouldn't be electrical characteristic changes.  Obviously, our ICT system detected a change.

 

  • 0
    TI__Expert 5890 points

    Hello Glenn,

    The top side markings our are internal tracking system. I was able to look up your particular shipment, and it is a post-PCN device.

    Likely, the ICT test fails due to the update in the ESD cells of the device. The TLE2064 was released in the 1990s, and the industry standards and knowledge about ESD protection have vastly increased since then. This is explained in the Section 6.1 of the app note ESD Cells in Opamps.

    Can you confirm if the device is functionally failing, or is it failing during ICT? The ESD protection should not affect the performance of the device during normal operation.

    Best regards,
    Carrie

  • 0
    Prodigy 40 points

    Carrie, thank you so much for your reply.  The main concern was whether or not there was enough change within the device to make the ICT capture it as an issue.

    It is VERY disheartening to have the PCN state "no change" to form, fit and function.

    We do not have the luxury of a customer supplied functional test here, so we just rely on the ICT coverage.

    The information that you provided was enough evidence to allow our ICT Engineer to modify the ICT program, so that these new and improved parts no longer fail at ICT.

    Also, I knew that these were post-PCN devices as the reel label showed the date code as 2505+5.  I'm not sure if that's the 5th of May, 2025?

    That's why I wanted to know how to read the date code markings on the parts, so I could explain to our Receiving Inspection team how to read them.

    Are you allowed to share the info. on how to read the date code markings?

    Thanks again for your assistance with this,

    Glenn

  • 0 in reply to Glenn Brown
    TI__Expert 5890 points

    Hi Glenn,

    The 2505 reads as the 5th week of 2025. It is a YYWW format. The +5 indicates this device has an extended shelf life of 5 years. Since we are now only producing post-PCN devices, any shipments you receive that start with "25" is a good method to determine if the die is pre or post PCN. 

    We appreciate your feedback on the PCN form, and look to further improve our future PCN releases.

    Best regards,
    Carrie

  • 0 in reply to Glenn Brown
    Prodigy 40 points

    So, you're not allowed to let me know how to decipher the part marking date code?

  • +1 in reply to Glenn Brown
    TI__Expert 5890 points

    Hi Glenn,

    The date code has a year-year week-week format. So, the 4 digits of the date code correspond to the last 2 digits of the year, and the week of that year. To decode more of the shipping label and device marking, please see this article HERE.

    Please let me know if you have further questions.

    Best,

    Carrie

  • +1 in reply to Carrie
    Prodigy 40 points

    Perfect.  Thank you Carrie!