PDF datasheet of 288 KB titled with nothing but the literature number SDLS173. Texas Instruments files many standard logic datasheets under SDLS codes, so identify the actual part from the header before relying on any figures. Typical sections are the connection diagram, function table, recommended operating conditions and switching data. A technician can use them to trace a digital signal through the chip, confirm it is powered and enabled correctly, and check that a replacement has the same pin arrangement.
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.