Datasheet file of 237 KB named after a Texas Instruments SDLS literature number, the code series TI reserves for its standard TTL logic documentation. Because the device name is not part of the file name, the cover page needs to be opened to see which part it covers. Inside such a document a technician finds the pin diagram, logic function, recommended operating conditions and switching data used when testing a chip in circuit. Opens in any PDF reader; verify the part marking on the board matches before trusting the values.
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.