Datasheet SDLS144, a 536 KB PDF without a part number in its name. The code follows the Texas Instruments literature pattern for standard logic products, and the device is identified in the title block. Typical sections cover pin assignments, logic function, recommended operating conditions, switching data and package drawings. Repair technicians use it to verify pin roles, expected levels and equivalent parts. Any PDF reader opens it. Check the chip marking and package type on the board against the listed variants 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.