eetom
Newbie level 5
I am not a beginner in electronics, but this question may be. I know what thermal resistance for a package is, but I have a question for somebody. I am looking at an IC that has 4 2n2222 transistor in it (MMPQ2222A). It is an SOIC-16 package. Now, there are two ratings for the thermal resistance: Each Die, and Effective 4 Die. The effective 4 die is 125C/W and Each Die is 240C/W. Is the thermal resistance for the package actually 125C/W because there are four dies in it? Is the the thermal resistance if all 4 transistors are operating? Why give the Each die figure if the 4 die figure is really the correct one? I have googled all over on this and have not obtained an answer. Fairchild has not responded yet either. Confused.