Where can I find thermal resistance numbers (Theta JA & Theta JC) for National\s packages?
Physical and thermal data for National”s plastic and hermetic packages can be found in the online documents for Plastic Packages and Hermetic Packages. For physical data, see Table 1 in each document; for typical thermal resistances (ThetaJA as a function of airflow, plus ThetaJC), see Table 2 in each document. Where I can find information on the chemical content of National Semiconductor products? To obtain the chemical content of any National Semiconductor product, go to the device”s product folder, scroll down to the table of Package Availability, and click on the package type. This will bring you to the package product folder. The package product folder contains dimensional data and chemical composition for the device in standard and lead-free versions (where both exist). If the product folder for the package in question does not have chemical composition data, please send us a Feedback. For best service, enter in the Comment field the information you require, and in the ProductF
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