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SN74AC244: Thermal Resistance Values

Mauricio P
Prodigy 40 points
Part Number: SN74AC244
Other Parts Discussed in Thread: SN74HC153

I'm a mechanical engineer performing a thermal analysis on a few boards.
There are some thermal characteristics I couldn't find in the part's datasheet.

Are any the following thermal resistance values documented for part SN74AC244DW?
   -junction-to-case
   -junction-to-board
   -case-to-board

Thanks in advance for any help.

  • 0
    TI__Mastermind 23155 points

    Hey Mauricio,

    I will submit some tickets for this information (as well for SN74HC153). I will update you when this comes back. It takes around 2-3 weeks. 

  • +1
    TI__Mastermind 23155 points

    Hi Mauricio,

    See below, 

    AC244: 

    Result- Theta JA-High K (standard datasheet value) 79.9
    Result-Theta JC, top (standard datasheet value) 45.3
    Result-Theta JB (standard datasheet value) 48.5
    Result- Psi JT (standard datasheet value) 19.8
    Result- Psi JB (standard datasheet value) 48.0
    Result-Theta JC, bottom (standard datasheet value) n/a

    HC153: 

    Result- Theta JA-High K (standard datasheet value) 118.6
    Result-Theta JC, top (standard datasheet value) 80.1
    Result-Theta JB (standard datasheet value) 76.7
    Result- Psi JT (standard datasheet value) 42.4
    Result- Psi JB (standard datasheet value) 76.5
    Result-Theta JC, bottom (standard datasheet value) n/a