Datasheet of 216 KB in PDF format, labelled SDNS015C, which is a literature code with a revision letter rather than a component name. The part, package and vendor are not stated, so check the opening page. Once identified, the document gives pin functions, supply ranges and package details, helping a technician trace connections on a schematic, measure the chip in circuit, test for shorts on its rails and source a matching substitute when needed.
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.
Any PDF readerSumatraPDFFirefox / ChromeFlexBV (links PDF to boardview)