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Original question:

LP5907: package drawing for LP5907A33YKMR

LP5907: YKE vs. YKM package, also ordering code question

Scott Brenneman
Genius 3295 points
Part Number: LP5907

I note that the difference between the YKE and YKM DSBGA packages is that the latter includes back coating.  I've read that this has advantages and disadvantages, but I'm not a expert.  Can someone here enlighten me as to why we might choose one vs. the other?

Also, when I look at the ordering codes for the YKE-packaged parts, there are both UVE and UVX suffixes, but I can't find any explanation for the difference.  What's the story there?

Thanks,

Scott

  • 0
    TI__Guru 55940 points

    Hi Scott,

    The only difference between the YKE and YKM DSBGA packages is the height.  There is no electrical difference.

    The "E" and "X" suffixes indicate the package quantity.  "E" indicates a package quantity of 250 while "X" indicates a package quantity of 3000.

    Very Respectfully,

    Ryan

  • 0 in reply to Ryan Eslinger
    Genius 3295 points
    Hi Ryan,
    If the only difference between YKE and YKM is the height, why would anyone choose the taller option? The YKM is taller due to back-coating, which is typically included for a reason, protection from ambient light being one. Is there any semiconductor-related reason why there is a back-coated package option?
    Thanks,
    Scott
  • 0 in reply to Scott Brenneman
    TI__Guru 55940 points
    Hi Scott,

    When DSBGA packages were originally released the backside coating was part of the manufacturing process. The backside coating makes it easier for a machine to read the backside marking, provides some additional edge protection for pick and place machines, helps to protect the device from light, and reduces the risk of mechanical damage. With advancements in technology, the backside coating is no longer as critical; therefore, in an effort to further reduce the height of the device, devices are beginning to be offered without the backside coating.

    Very Respectfully,
    Ryan
  • 0 in reply to Ryan Eslinger
    Genius 3295 points

    Thank you Ryan, I appreciate the explanation.

    Scott