This thread has been locked.

If you have a related question, please click the "Ask a related question" button in the top right corner. The newly created question will be automatically linked to this question.

TL082: TL082CP Why do the leadframes look oxidized or corroded? DC 18+

Part Number: TL082

Hi, everyone.this is Summer from Union Components . 

recently ,I got a TI part TL082CP,but the leadframes looks like oxidized. like the picture below. 

So I find another reliable supplier to take this part, their parts doesn't looked like oxidized.pls check the picture below,

They are both DC 18+,so I am confused, does it means some parts are using non-rough leadframes and some are rough leadframes?

and there are some differiences on the top of marks (the typeface ,and the typesetting...)

anyone knows why ? do you encounter the same confusing ?

pls kindly let me know. thanks a lot.