TCA9517A: The maximum absolute rating of TJ and TC

Hello Matsumoto-san,

TI does not specify the part in terms of abs max junction temperature.  Generally speaking it is the same as max storage temperature, but note that it isn't expected to operate properly at those temperatures outside of max operating temperature.  I am in the process of reviewing our process specifications for that part and can confirm this in a day or two. 

-Francis Houde 

Francis san

Thank you for your reply!
Ok, we are waiting for your reply!

Kind regards,

Hirotaka Matsumoto

Hello Matsumoto-san,

Sorry for the delay.  Here is what I found out.  If the part is unpowered then the abs max junction temperature is 150C with no effect to the Failure In Time (FIT) rate.  If you expose the part to great than 105C you will increase the FIT rate. a little.

Hope this answers your question.

-Francis Houde

Francis san

Thank you so much for your reply!

OK, we got about TJ.
How to calculate TC, is the following formula?
Tj = ψjt × P + Tc1

Kind regards,

Hirotaka Matsumoto