Microchip Technology's 25LC256-E/SM SPI Serial EEPROM

The 25LC256-E/SM is a 256 Kb (32 K x 8) Serial Electrically Erasable PROM, capable of operation across a broad voltage range (2.5V to 5.5V). This versatile non-volatile memory module from Microchip Technology is designed for advanced, flexible storage that requires low power consumption and reliable data retention.

Utilizing the industry-standard Serial Peripheral Interface (SPI), the 25LC256-E/SM allows for high-speed data transfer, making it an excellent choice for a wide range of applications, including those in the industrial, automotive, and consumer electronics sectors. The device supports the SPI protocol's traditional modes (0,0 and 1,1) for compatibility with a vast array of microcontrollers and is capable of clock frequencies up to 10 MHz.

The 25LC256-E/SM's memory is organized as 32,768 words of 8 bits each, which are functionally divided into 128 pages of 256 bytes each. This organization facilitates both random and sequential access, streamlining data write and read operations. The EEPROM is capable of withstanding a minimum of 1 million write cycles, with a data retention period of over 200 years, ensuring the safety and longevity of critical data.

Microchip's attention to security and data integrity is evident in the 25LC256-E/SM's design, which includes a write protect pin to prevent accidental data overwrites and an onboard page write buffer to expedite the programming of multiple bytes simultaneously. Additionally, the device features a Self-Timed Erase and Write cycle with auto-erase before writing, simplifying the write operation and ensuring data integrity.

The 25LC256-E/SM comes in a compact, surface-mountable 8-lead SOIC package, denoted by the "SM" suffix in its part number. This package is optimized for space-constrained applications and ensures a reliable connection to the printed circuit board. Whether you are designing a sophisticated industrial control system or a compact consumer gadget, the 25LC256-E/SM offers the perfect blend of durability, flexibility, and performance.

For detailed technical specifications, application notes, and support tools, visit the Microchip Technology website or contact their customer support team.