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LM340: Temperature spec.: LM340T-12/NOPB vs LM7812CT/NOPB

BvK
Prodigy 10 points
Part Number: LM340

In the LM340/LM7812 datasheet (https://www.ti.com/lit/ds/symlink/lm340.pdf), the package option addendum has an operating temperature spec. of -40°C to +125°C for the LM7812CT/NOPB, but there is no temperature spec. given for the LM340T-12/NOPB.

Can anybody confirm what the operating temperature spec. is for the LM340T-12/NOPB (noting that for LM340T-12 it is 0°C to 70°C)?

  • 0
    TI__Genius 12535 points

    Hi, 

    Thank you for sharing this information with us. 

    By looking at the package option addendum and the Electrical Characteristics table 6.7 for LM340/LM7812 it has a Tj range of 0°C ≤ TJ ≤ 125°C, unless otherwise specified:

    From all this, one could assume that it is 0 to 125 for the LM340T-12/NOPB as well. 

    This is an old device that was also inherited from National Semiconductor, but let me take a deeper look into why the LM7812CT/NOPB has a -40 to 125 Op Temp. 

    Best, 

    Edgar Acosta