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javiervara's avatar
javiervara
Icon for New Contributor rankNew Contributor
3 years ago
Solved

5M570ZT144A5

We are currently using your 5M1270ZT144A5 chip, but it is currently sold out worldwide. We have been able to find the alternative 5M570ZT144A5 but this has come with a two questions/problems: - Desp...
  • AqidAyman_Altera's avatar
    AqidAyman_Altera
    3 years ago

    Hello,


    From our assessment, two GND pins which left floating should not impact the functionality of the device. However, please bear in mind this is not guaranteed by Intel as it does not follows the recommendation.


    There are possibility for the signal performance degraded and noises may be increase as well which may have a big impact for high speed signal.


    This information also might be useful for this issue: Migration Pinout


    I hope this helps you.


    Regards,

    Aqid Ayman


AqidAyman_Altera's avatar
AqidAyman_Altera
Icon for Regular Contributor rankRegular Contributor
3 years ago

Hi,


Not all pins marked as GND will be connected internally to other GND pins. Sometimes they may be left floating for package migration, or physically need to be tied to GND because they are special purpose test/mode pins.


My suggestion is, you can check the discontinuity from pin to pin measurement on these two GND pins with other GND pins on 5M570Z. If it is connected, then it should be okay to left floating as they are connected internally. However, Intel highly recommended connecting these GND pins to the board ground plane. It is the responsibility of the designer to apply simulation results to the design to verify proper device functionality.


Regards,

Aqid Ayman