A short PDF datasheet, only 26.4 KB, labelled SM5K5 with a trailing _7 suffix that may indicate a page, section or edition number; the name does not say which. Being so small, it likely covers just a part of the full documentation, so pairing it with the companion SM5K5 file may be needed. Use it to check pin assignments, electrical limits and package details when diagnosing or substituting the part, and verify the printed marking on the chip matches before trusting the values.
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.