EEPROM Memory IC: Microchip 25AA256-I/SN 256K SPI Bus Serial EEPROM

In the realm of non-volatile memory solutions, Serial EEPROMs play a pivotal role in storing critical data in embedded systems. The Microchip 25AA256-I/SN stands out as a high-performance, 256-Kbit SPI Serial EEPROM designed for a wide array of applications requiring reliable and efficient memory storage.

This IC is organized as 32,768 words of 8 bits each, providing ample space for system parameters, calibration data, or event logging. Its operation is facilitated through a simple and robust 4-wire SPI-compatible serial interface (SI, SO, SCK, and CS), enabling high-speed data transfer with a maximum clock frequency of 10 MHz. This makes it suitable for communication with virtually any modern microcontroller, ensuring seamless integration into existing designs.

A key feature of the 25AA256-I/SN is its low-power consumption, which is critical for battery-powered and portable devices. It supports a wide voltage range from 1.8V to 5.5V, offering design flexibility across different power architectures. Furthermore, it boasts a byte-level and page-level write capability (64-byte page), allowing for efficient memory management. The built-in hardware write-protect (WP) pin and software protection features enable block protection of memory sections, safeguarding data from unintended writes or corruption.

With an endurance of over 1,000,000 erase/write cycles and a data retention period of more than 200 years, this EEPROM ensures long-term data integrity and reliability. It is offered in the compact 8-lead SOIC (SN) package, making it an ideal choice for space-constrained applications such as industrial control systems, automotive electronics, smart meters, and consumer products.

ICGOODFIND: The Microchip 25AA256-I/SN is a superior choice for designers seeking a high-capacity, reliable, and low-power SPI EEPROM solution. Its combination of a simple interface, robust data protection, and excellent endurance makes it a cornerstone component for modern non-volatile memory needs.

Keywords: SPI Interface, Low-Power, Non-Volatile Memory, Hardware Write-Protect, High Endurance.