Filed as a schematic, this 412 KB PDF names the 93AA76, 93LC76 and 93C76 parts in A, B and C variants, which matches the numbering of a 8 Kbit Microwire serial EEPROM family, so it is most likely a combined datasheet. Technicians use such a sheet for pinout, organization pin behaviour and supply voltage limits per variant. It helps when reading or rewriting a small configuration EEPROM with a programmer. Check the exact suffix printed on the chip first, because the variants differ in word organization.
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.