PDF datasheet of 297 KB for the 24AA65, 24LC65 and 24C65 serial EEPROMs, a 64 Kbit I2C family. The document lists electrical characteristics, pin functions, addressing and the write and protection features of these parts. Repair technicians open it to verify the pinout before clipping a programmer onto the chip or to check expected supply voltage when a board fails to read its configuration. This family is not identical to the 24xx64, so confirm the exact marking on the package before choosing the device in the programmer.
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 @cyberlanelectonik. 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.