PDF datasheet, 391 KB, named with the bare literature code SDNS002 and no revision suffix. The file name gives no part number, so the component it documents can only be identified from the title page; the code format resembles that used by Texas Instruments. During repair a datasheet like this is consulted for pinout, recommended operating conditions, switching characteristics and package outline. Verify that the chip on the PCB carries the same part number before trusting measured values against the tables inside.
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.