Literature code SDLS200 names this 106 KB PDF datasheet, with no device or revision information in the file name. The numbering resembles Texas Instruments logic documentation, so the title page will identify the part. Technicians use sheets like this to find pin assignments, read the function table and check input threshold and output levels while probing in circuit. Open it in a PDF reader and confirm the chip marking, logic family and package match before trusting the data.
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.