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RM48L952: Device marking decoding

Hugo Cruz
Prodigy 190 points
Part Number: RM48L952


Hello e2e forum,

I need to know Manufacturer parts traceability, like lot code, for my project, how can I find it? The device marking on the top of the package have some letters in the third line that I could not decode. In the errata sheet (http://www.ti.com/lit/pdf/spnz223

  • 0
    Prodigy 190 points
    why i cannot edit my original post?

    The following completes my previous post:

    ... In the errata sheet (www.ti.com/.../spnz223) that letters are marked with ### - ####### but there are no explanation. I also found this www.ti.com/.../snoa039c.pdf but seams not coherent with my package marking.

    Thanks in advance
  • 0 in reply to Hugo Cruz
    TI__Guru 59540 points
    Hello Hugo,

    The numbers/letters you are referring to are the manufacturing lot code and date code information. The code will not be unique to individual devices and will not provide traceability to parametric data at TI. For specific device information and unique identifiers per device, it is recommended to use the DIEIDL and DIEIDH registers within the device.
  • 0 in reply to Chuck Davenport
    Prodigy 190 points

    Hello Chuck,

    thanks for the tip! It is what I was looking for. There are some document that explain that these letters are the manufacturing lot code and date code information and how to read them? I think that sooner or later I will need to prove it. 

  • 0 in reply to Hugo Cruz
    TI__Guru 59540 points

    Hello Hugo,

    The primary purpose of these markings has been primarily for TI internal use. However, if you would like to utilize them for some sort of tracking for your own purposes there are know restrictions to this. In regard to the definition of the symbolization, since it is a TI internal use marking, there are no public documents describing it but from our internal documentation the symbolization is as follows from a representative device setup/release document:

         CHAR/  +--------------------+ TI BUG  = TI LOGO                                  
     LINE   !        TI          ! YMLLLLS = LOT TRACE CODE                           
            !        BUG         ! YM      = 2 DIGIT YR/MO DATECODE                   
     13     !   TMS570           ! LLLL    = ASSY LOT                                 
     13     !   4357BZWTQQ1      ! S       = ASSY SITE CODE                           
     13     !   $$#-YMLLLLS      ! $$      = WF CODE                                  
     13     !           G1       ! #       = DIE REV CODE                             
     .      !o          __       !                                                    
            +--------------------+                                                    
        o= PKG PIN 1 LOCATION     G1       = MUST BE MARKED WITH UNDERSCORE

    It is worth noting as I said before, the manufacturing information on the top of the device will apply to every device from within a specific manufacturing lot which may represent a collection of wafers from various die lots and used only for tracking of manufacturing dates. There may be as many as 4000-5000 or more devices with the same code on them.

    For unique device information, please consider using the DIEIDx registers within the device. This is what is used whenever we have a product returned to examine the parametric data associated with the specific die.