Small 176 KB RAR archive named only after the SMSC LPC47N350 controller, with nothing in the name to say what is inside. Given the size it may hold firmware or a short document rather than a full datasheet, so inspect the contents before relying on it. The LPC47N350 serves as a keyboard and embedded controller on some laptops. If it turns out to be a firmware image, back up the existing chip contents with a programmer first and confirm that the board actually uses this controller before writing anything.
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 @generalschematics. Enginerys does not host this file.
How to open a .rar file
Compressed archive — the usual wrapper for a schematic + boardview pair or a BIOS + EC set.