PDF document of 219 KB catalogued as a datasheet under the code SDYA009. The name is a literature number only and does not identify a specific chip; codes of this pattern are sometimes used for application notes as well as datasheets, so the first page will clarify both subject and type. It can still be valuable during repair for understanding how a logic or interface family behaves, what levels and loads it expects, and how to interpret measurements around such parts.
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.