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Original question:

MSP430FR5964: Obtaining parts with Lot trace code >87XXXXX

MSP430FR5964: ADC67 errata note, how to read LOT trace code

Mateusz Gzella
Prodigy 240 points
Part Number: MSP430FR5964

Hello,

I have a problem with decoding the lot trace code. The ADC67 errata note clarifies, that: "Devices with lot trace code > 87XXXXX are not affected by this issue". Do I understand correctly that:

1a) 73ALZYW is affected (73 is not > 87)
1b) 87AK0TW is affected (87 is not > 87)
1c) 8BA65ZW is ok (8B is > 87)
1d) 08AS7PW is affected (08 is not > 87).

I am not sure case 1d, because devices works ok, and this markings are from microcontrollers from delivery in last quarter. Is it possible that this counter "overflow" and this 08 code is > 87 in the sense of the errata entry?

  • 0
    TI__Mastermind 26420 points

    Hello Mateusz,

    I don't think there is an overflow on the lot trace code.  What package do you have?  Did you refer to the package markings diagram on page 3 of the Errata Document?

    Also, I've looked into the ADC12 Errata before, and this came from an issue during the temperature calibration process.  The calibration data isn't necessarily wrong on all parts, but it can not be guaranteed.  And there was enough variation in the calibration data, that over a large sample it's not useful.  This calibration routine was fixed, and that's why later lots can be guaranteed.   

    Also, I believe there are still <87xxx in the distribution channel, so just because it was delivered recently doesn't mean that it's from a >87xx lot.  

    Thanks,

    JD

  • 0 in reply to JD Crutchfield
    Prodigy 240 points

    Hi,

    I have ZVW87 (NFBGA) package and I decoded LOT code using diagram from the Errata Document. I understand, that not all MCU has wrong calibration data, but usually during our tests after manufacturing process we have a few devices with temperature test failed when "<87xxx" MCU are used. 

    In the production process, we mark devices that have MCUs with uncertain calibration data - I understand that we also should mark the devices with 08AS7PW revision in this way.

    Best regards,

    Mateusz

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