Datasheet number SDLS166, a 255 KB PDF. Nothing beyond the literature code appears in the name, so the specific logic device is identified inside the document itself; the SDLS prefix matches the numbering Texas Instruments uses for standard logic publications. Expect pin assignments, function tables, absolute maximum ratings and mechanical outlines. It is handy when probing a suspect gate or buffer with a meter or scope. Always verify that the chip marking and package type agree with the sheet.
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.
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The standard format for schematics, block diagrams, power-sequence charts and service manuals.