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SN74LVC1G240: SN74LVC1G240 - Package Thermal Impedance (DRY, DSF)

Brian Kindel
Prodigy 170 points
Part Number: SN74LVC1G240

Please provide documentation for the package thermal impedance for the SN74LVC1G240 in the DRY and DSF packages.

Page 2 of the datasheet shows the package thermal impedance for the DBV, DCK, and YZP packages.  The datasheet does not include the package thermal impedance for the DRY or DSF packages.

Please provide the thermal impedance for the SN74LVC1G240 in both the DRY and DSF packages.

Thanks,

Brian

  • 0
    TI__Expert 6680 points

    Hi Brian,

    I've went ahead and requested for these thermal impedance values. I'll post back here when the thermal modelling team gets back to me (~2 weeks).

    Thanks!

    Chad Crosby

  • 0 in reply to Chad Crosby
    Prodigy 170 points

    Hi Chad,

    Thank you for the quick response.

    Once the thermal impedance values are available for these additional packages, it would be great if a datasheet revision could be submitted to add this information to the datasheet as well.

    Thanks again,

    Brian

  • 0 in reply to Brian Kindel
    TI__Expert 6680 points

    Hi Brian,

    Sure, once all of the thermal values come back, we'll update the DS & send out a change notification for it.

    Thanks!

    Chad Crosby

  • 0 in reply to Chad Crosby
    Prodigy 170 points

    Hi Chad,

    It's been about 4 weeks.  Just checking on the status of these thermal impedance values.

    Thanks,

    Brian

  • 0 in reply to Brian Kindel
    TI__Guru* 97046 points

    Hi Brian,

    My apologies for the delay on this. Chad has moved to another team inside TI and I wasn't watching this thread.  We have the thermal models here:

    DRY package

    Result- Theta JA-High K (standard datasheet value)

    		 354.8

    Result-Theta JC, top (standard datasheet value)

    		 249.6

    Result-Theta JB (standard datasheet value)

    		 222.2

    Result- Psi JT (standard datasheet value)

    		 77.7

    Result- Psi JB (standard datasheet value)

    		 221.4

    Result-Theta JC, bottom (standard datasheet value)

    		 n/a

    DSF package

    Result- Theta JA-High K (standard datasheet value)

    		 347.9

    Result-Theta JC, top (standard datasheet value)

    		 214.5

    Result-Theta JB (standard datasheet value)

    		 210.9

    Result- Psi JT (standard datasheet value)

    		 35.3

    Result- Psi JB (standard datasheet value)

    		 210.9

    Result-Theta JC, bottom (standard datasheet value)

    		 n/a

    I don't know how far Chad made it on updating the datasheet, but it's likely due to our current workload and available resources that we won't be updating this immediately. Please let me know if having this in the datasheet is a necessity for you.