PDF datasheet of 251 KB identified by the literature number SDLS210. The name gives no device, family or package; the SDLS style is typical of Texas Instruments logic literature, so the title page will show the actual part. Such a sheet is handy for tracing signals through a logic stage, confirming which pin is enable or clock, and checking voltage and timing limits. Open it in any PDF reader and verify that the IC marking on the PCB corresponds to the part described.
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.