25AA640A

The 25AA640A is a 64-Kbit serial EEPROM from Microchip Technology, offering non-volatile data storage with high reliability and low power consumption. It features a 2-wire Serial Peripheral Interface (SPI) compatible architecture, enabling efficient communication with microcontrollers and other digital systems. The device supports clock frequencies up to 400 kHz, ensuring fast read and write operations while maintaining compatibility with standard SPI protocols. This memory component provides 8,192 bytes of user-accessible memory organized as 64 pages of 128 bytes each, allowing flexible data management for applications requiring frequent updates or small block writes. The 25AA640A includes built-in write protection mechanisms such as hardware write-protect pins and software-based write enable/disable commands, enhancing data integrity and preventing accidental overwrites. Its endurance specification guarantees at least 1 million erase/write cycles, making it suitable for long-term use in demanding environments. Designed for operation across a wide voltage range of 1.7V to 5.5V, the 25AA640A ensures compatibility with both low-power battery-operated devices and higher-voltage industrial systems. It consumes only 1.5 μA in standby mode and 3 mA during active operations, optimizing energy efficiency for portable and IoT applications. The chip also features a robust package option in 8-pin SOIC, providing reliable mechanical and thermal performance in various operating conditions. Commonly used in consumer electronics, automotive systems, medical devices, and industrial control units, the 25AA640A serves as an ideal solution for storing calibration data, configuration settings, firmware updates, and user preferences. Its ability to retain data for up to 200 years under normal operating conditions makes it particularly valuable in applications where data persistence is critical. Additionally, the device supports page write operations up to 128 bytes per cycle, reducing programming time and improving system responsiveness. With its combination of speed, durability, and low power, the 25AA640A meets the evolving needs of modern embedded systems requiring dependable, on-chip memory solutions.