DatasheetDir is a cool project. The name datasheetdir is short for datasheet directory. Not only can you search for datasheets in datasheetdir, but also choose from a host of electronic chips by category. More importantly, you can find the chips' pin-outs and application circuits. I used to be an electronic engineer and one day I decided to do something for electronic engineers so I created datasheetdir.com. I spent three years creating this site and I don't know if it can help you, but I have done my best.