Jechavarria shared some tips and tricks on using the 24LC256 I2C EEPROM memories:
I resume this brief series of articles with another device I usually use. It’s the popular 24LC256 I2C EEPROM memory, from Microchip. First of all, you can find the datasheet here. This memory has a 32K x 8 bytes of capacity (36768 bytes if you prefer), and can works between 1.7V to 5.5V, with a maximun clock frequency of 1MHz (FC model with Vcc > 2.5V). Of course, it’s compatible with the 100khz and 400khz standard speeds. Here’s a block diagram of this memory.