Datasheet PDF around 454 KB, identified only by an SDLS literature number rather than a part name. Texas Instruments uses that prefix for its logic datasheets, so it most likely documents a TTL device of the 74 series; the actual chip is stated inside the file. Such sheets give the pin configuration, logic table, absolute maximum ratings and propagation delays. Technicians use them to identify signal pins and expected levels while probing, after confirming the covered part number matches the marking on the component.
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.