Datasheet in PDF form identified only by the Texas Instruments style literature code SDLS100, at 413 KB. The name does not state the part number, so open the document to confirm which logic device it covers before using it. TI SDLS codes are typically assigned to classic TTL and LS-series logic families, where such sheets give pinouts, truth tables, supply limits and timing. A technician uses this kind of reference to check expected pin levels on a suspect gate or counter and to pick a correct replacement when a chip on the board has failed.
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.