Small PDF datasheet, 146 KB, named only by the literature code SDLS098 with no device number in the title. Texas Instruments uses the SDLS prefix for its legacy TTL and LS logic datasheets, so the content is most likely one such logic family member; open it to confirm. These documents list pin functions, truth tables, absolute maximum ratings and timing data, giving a technician the reference needed to test gates, flip-flops or counters in circuit and to choose an equivalent part when a replacement is required.
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.