Datasheet in PDF form for a part marked SM5908, an 80.4 KB document. The file name carries only the part number, with no manufacturer, revision or package code, so the exact function of the device should be confirmed from the first page. Technicians use such a sheet to read the pinout, absolute maximum ratings and typical application circuit when replacing or testing a chip on a board. Any PDF reader opens it; compare the full marking on the package against the document before ordering a substitute.
The button opens the matching file on RM Schematics, or a source page if it is not catalogued there yet. The original attachment is from @datasheet_technar_org. Enginerys does not host this file.
How to open a .pdf file
The standard format for schematics, block diagrams, power-sequence charts and service manuals.