You have to be patient and Persistant. I have a way of searching that seams to work. I use alternate Key words and Terms to find what I want. It also takes hours of time looking for one datasheet. As you see There are alot of them I can not find. After 2 or 3 days of searching I put it aside for later on a list. Then when I find a good site I return to the list and search for the others.
It is like finding a needle in a Giant Haystack sometimes.
Want a challange? Find one that I already found.
STRF6524 Now that one was tuff to find!
STR-F6524.pdf