A 977 KB PDF datasheet identified by document code SDNS028B, where the trailing letter usually indicates a revision. The file name does not tell which device it documents, so confirm that from the cover page before use. Its content will help with mapping pins to signals, checking recommended operating voltages and timing, and comparing an in-circuit part against specification, which is the basis for deciding whether to rework the chip or look elsewhere for the fault.
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.