Datasheet in PDF for the 24AA02 and 24LC02B, 2 Kbit serial EEPROMs on the two-wire I2C bus. The document lists pin functions, address inputs, write-protect pin, supply voltage limits and write-cycle timing for both versions. On the bench it serves to confirm the footprint and pinout, check the SDA and SCL signals and supply, and choose the correct type in programmer software. Compare the package marking with the numbers here and save the original memory contents to a file before making any change.
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.