Small 228 KB PDF datasheet carrying only the code SDLS171, so the name alone does not identify the device. The SDLS prefix follows Texas Instruments literature numbering for standard logic datasheets; check the title on the first page to confirm the part. Even brief logic sheets list pin functions, a function table and electrical ratings. They support quick checks of VCC and ground, comparison of measured logic states with expected outputs, and verification of pinout 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.