datasheet

Hi. Has anybody used a search datasheets at [url]http://datasheets.name?[/url] I attempt to enter an electronic component name - and get a datasheet which has been found, and a description of the semiconductor chip, but it doesn't allow to download it. P.S. Site [url]http://datasheetscatalog.biz[/url] can search on other sites, but there is no documentation for some electronic components there.