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AM26LV32E: Test Failures

Chris Hodder
Prodigy 10 points

Part Number: AM26LV32E
Other Parts Discussed in Thread: OPA2990, AM26LV32

I have attached a presentation of an issue, this is the 3rd part that we have experienced this problem with test failures

I can see no PCN's where changes have been made to the die, the part number on the die has no reference to the part number as previously shown from decapsulations that we have carried out internally

We would like a definitive response from Ti as to whats changed, is it a anti-counterfeiting solution, or something else

P-MF01-0170 (CA00168760).pptx 

  • 0
    TI__Mastermind 29602 points

    Thanks for reaching out with this problem. 

    There was a PCN for this device for a die change in 2023 (linked here). From the top markings, I can see that these devices span before and after this PCN change. Based on your testing, was there an actual communication failure? From your report, it seems that this is just an ICT spec difference. It is expected to see resistance differences during a die change. Pin resistance to GND is not a required spec that we call out in our datasheet. This device also did go through some bus side improvements regarding the failsafe biasing, which is what you are seeing. So that difference is also expected. 

    This resistance difference is a common topic we discuss with other customers due to die changes. The solution is to adjust the ICT resistance range to include this latest generation of specs. 

  • 0 in reply to Ethan Sempsrott
    Prodigy 10 points

    As said, this is the 3rd device that we have had issues with, I have been given a 4th part over the weekend that has failed test, where can I find the directory for all of the PCN's related to the parts in question

    The new part highlighted to me is TL032CDR, we again purchased parts directly from Ti using PU03762648, and purchased x2 reels (x2.5k), we again have conducted a decapsulation, and found a difference between the new datecode 2541 & the previous one 2240, that works

  • 0 in reply to Chris Hodder
    Prodigy 10 points

    I can also see that TL032CDR is a customed build, and a newer part is available OPA2990

  • 0 in reply to Chris Hodder
    TI__Mastermind 29602 points

    Hi Chris,

    The easiest way to find all PCNs is to use a distributor website like Mouser or Digikey, where they will have all PCNs in each device's description. 

    I only support AM26LV32 so the other devices I am not an expert on. You can create new E2E questions with those devices in the description, and the correct engineer will be automatically assigned to your question.

    Again, it would be very helpful to know what you mean by "failed test." Please elaborate if possible.

    Best,

    Ethan