PDF datasheet SDLS156, 546 KB. Only a literature code appears in the name, in the numbering scheme Texas Instruments uses for logic product documents, so the exact integrated circuit must be confirmed from the first page. Contents normally cover pin configuration, functional description, electrical characteristics and mechanical drawings. Technicians use it to identify supply and ground pins, check expected output states and pick an equivalent part. Match the logic family and package on the board against the document first.
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.