PDF document of about 473 KB named only by a Texas Instruments literature code, so the specific component is not identified by the name. SDLS codes are used for TI logic datasheets, pointing to a 74-series TTL family part, but this must be confirmed by opening the file. Expect a function table, pinout drawing, recommended operating conditions and timing specifications. Once the part number is read from the document, compare it against the IC on the board and use it for pin lookup and fault checking.
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.