PDF datasheet, 37.8 KB, for the device numbered SM3504. The name carries no manufacturer, suffix or revision, only the part number itself. Technicians use such documents to find which pins are power, ground and signal, to check ratings against what the circuit demands and to identify a replacement when the original is unavailable. It opens in any standard PDF viewer. Because many closely numbered SM35xx parts exist, confirm the exact marking on the chip and its package before applying values from this sheet.
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.