PDF datasheet of 164 KB whose name refers to the SM8502 and a variant marked 6, apparently covering related parts in one document; the exact grouping and manufacturer are not stated. Expect pin assignments, electrical characteristics and possibly differences between versions. Technicians use such information to identify supply and control pins, check signals with a meter or scope and judge whether a part has failed. When the sheet covers several variants, confirm which suffix is fitted on the board before trusting a pin table or rating.
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.