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Original question:

MSP430G2744: Maximum Junction Temperature

MSP430G2744: Absolute Maximum Operating Temperature

Mari Tsunoda
Expert 5726 points

Part Number: MSP430G2744

Hi Team,

In the related thread, we discussed that it is ok to assume that the Absolute Maximum Junction Temperature is 85°C due to Absolute Maximum Junction Temperature being a little higher than Operating free-air temperature. 

However, after measurements, they would like to know what value is definitively. Could you tell me what the definitive value for absolute maximum operating temperature is?

Typically the maximum would be 125°C or 150°C on other common ICs. Can you tell me why it is lower, if it is? 

Best regards,

Mari Tsunoda

  • 0
    TI__Mastermind 23815 points

    Hi Mari Tsunoda

    >> Could you tell me what the definitive value for absolute maximum operating temperature is?

    as the previous thread, There is no junction temperature information on MSP430G2744 DS. maximum junction temperature is usually a little bit higher than Operating free-air temperature. MSP430G2744 Operating free-air temperature is high to 85C. we can think they are the same (85C) because there is no junction temperature information on MSP430G2744 DS

    >> Typically the maximum would be 125°C or 150°C on other common ICs. Can you tell me why it is lower, if it is? 

    Most of MSP device Operating free-air temperature is 85C.

    Thanks!

  • 0
    Guru 42865 points

    It is lower because of the epoxy. A 150C temperature assumes that the issue is the aluminum interconnects, with free air on the chip. At 85C since the unit is coated with epoxy, it is the epoxy that limits the Absolute Maximum. (Note, I am not a TI employee, but I have a few years of semiconductor experience.)

  • 0 in reply to Xiaodong LI
    TI__Expert 5726 points

    Hi Xiaodong,

    Can you confirm what Keith has said below for me? They want to know the reason for the lower temperature comparatively to other ICs they have used.

    Best regards,

    Mari Tsunoda

  • 0 in reply to Mari Tsunoda
    TI__Expert 5726 points

    Hi Xiaodong,

    Any update on this?

    Best regards,

    Mari Tsunoda

  • 0 in reply to Mari Tsunoda
    TI__Mastermind 23815 points

    Hi Mari Tsunoda

    >> Can you confirm what Keith has said below for me?

    I think Keith's comment is from material prespective.

    my commnet on the Operating free-air temperature  and Operating junction temperature parameter is from device specification prespective.

    The Maximum Operating Temperature of MSP430G2744 which is 85C is not only related with material, but also related with the specification and test.

    The higher temperature specification / test requirement will lead to the higher cost.

    >> They want to know the reason for the lower temperature comparatively to other ICs they have used.

    I think most MCU Maximum Operating Temperature will be 85C, 105C or 125C.

    Could you please provide customer using MCU part member which maximum operation temperture would be 125°C or 150°C?

    Thanks!

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