Datasheet in PDF form, 588 KB, carrying only the code SDLS193 as its name. The SDLS prefix matches the literature numbering Texas Instruments uses for its classic TTL and logic family documents, but the specific part number is not stated, so open the first page to confirm which device it covers. A logic datasheet typically gives the pinout, truth table, supply range and timing figures. Technicians use it to check expected pin levels and to choose an exact replacement before swapping a gate or buffer.
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.