Short 225 KB datasheet in PDF, named only SDLS181, which does not state the device it describes. The SDLS prefix corresponds to Texas Instruments literature numbers for standard logic parts, so confirm the part designation from the document heading. Even a brief logic sheet usually gives a pinout, truth table and electrical limits. Technicians use this to verify input and output states on a live board, to spot a chip running out of spec, and to make sure a replacement has the same footprint and pin order.
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.