The Microchip 25LC256-I/SN is a 32 kilobyte Serial Peripheral Interface (SPI) Electrically Erasable Programmable Read-Only Memory (EEPROM). It has a SPI interface that operates from 2.5 to 5.5 Volts at up to 10 MHz with eight pins in a SO8 package. It is organized as 32k x 8 bits and features a self-timed write cycle and low power consumption. The memory is accessible via a three-wire serial interface. Its support for hardware write protection bounds the write cycle to 250 ms.