A compact 392 KB datasheet in PDF, labelled SDLS188 and otherwise uninformative about which component it describes. Texas Instruments employs this SDLS literature code range for many standard logic parts, so check the header to identify the device and its suffix variants. The document should include pin descriptions, truth tables and recommended operating conditions. Repair work benefits from it when probing inputs and outputs with a logic probe or scope, and when confirming the package footprint before fitting a replacement chip.
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.