Datasheet for the SN74ABT16827DGGR, a Texas Instruments 20-bit buffer and line driver with 3-state outputs in the ABT family, here in the DGG TSSOP package on tape and reel. The 25.8 KB PDF should carry the pinout, function table, electrical characteristics and switching times. Technicians use it on bus-heavy boards to identify output enable pins, compare logic levels between inputs and outputs and find a stuck or shorted channel. Confirm package and pin count on the board before using the pinout.
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.