Datasheet in PDF form, 1.32 MB, carrying a Texas Instruments literature number: SLVS631 at document revision C. The file name does not say which part it covers, so open it to see the device name on the first page. TI datasheets of this type give the pinout, electrical characteristics, typical application circuits and package drawings. Technicians use them to check expected pin voltages, find replacement parts and understand how a power or interface IC behaves on a board.
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 @ic_mosfet_pdf_datasheets. 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.