Traditional memories IC.

Traditional memories like the 24CXX are more than known and use the I2C protocol, and the first initials are easy to recognize by starting with 24xx, similarly happens in the SPI memories that come with the initials 25xx, which use SPI protocol, and They are easy to recognize by the first initials.

The I2C memories

24C01 ..................... 1Kb
24C02 ..................... 2kb
24C04 ..................... 4kb
24C08 ..................... 8kb
24C16 ..................... 16kb

Where the child never replaced the superior, but if the superior to the minor, being thus perfectly replaceable

The SPI memories

W25P10 ................. 128kb
W25P2O ................. 256kb
W25X40AL .............. 512kb
A25L80P ................ 1M
W25P16 ................. 2M
W25Q32BV ............ 4M
W25X64 ................. 8M
W25Q128BV ........... 16M.