Secure Serial EEPROM Memory: Microchip AT24CS01-XHM-T with Factory-Programmed 128-Bit Serial Number

In the rapidly evolving landscape of embedded systems and IoT, the demand for robust hardware-based security and reliable non-volatile memory is paramount. The Microchip AT24CS01-XHM-T stands out as a critical solution, merging a standard 1Kbit Serial EEPROM with an immutable, factory-lasered 128-bit serial number. This unique identifier is permanently written during manufacturing, providing an unalterable hardware root of trust essential for advanced security applications.

This device operates via the ubiquitous I²C protocol, ensuring broad compatibility with a vast range of microcontrollers and processors. The EEPROM array itself offers a highly reliable storage medium for critical system data, parameters, or user information. However, its defining feature is the integrated factory-programmed serial number. This 128-bit value is stored in a separate, read-only memory space, guaranteeing that every single IC possesses a truly unique identity that cannot be cloned or modified. This capability is crucial for implementing secure boot processes, preventing counterfeiting, enabling advanced asset tracking, and managing device authentication in networks.

The inclusion of a hardened unique serial number directly on a common memory chip simplifies system design. Designers no longer need to implement complex and potentially less secure software-based UUIDs or incorporate additional specialized ICs for identity management. The AT24CS01-XHM-T consolidates these functions into a single, compact 8-lead TSSOP package, making it an ideal choice for space-constrained applications like consumer electronics, medical devices, industrial controllers, and smart sensors.

Furthermore, the device offers enhanced data integrity with advanced write protection capabilities. By utilizing the WP (Write Protect) pin, the entire memory array can be hardware-locked, safeguarding both the user data and the vital serial number from any accidental or malicious overwrites. This combination of non-volatile memory and immutable identity establishes a formidable foundation for building secure and traceable systems.

ICGOOODFIND: The Microchip AT24CS01-XHM-T is a highly integrated and security-focused Serial EEPROM. Its core value lies in providing a factory-lasered, unchangeable 128-bit serial number, which serves as a fundamental hardware root of trust for authentication, anti-cloning, and secure identification in IoT and embedded designs, all within a standard memory interface.

Keywords: Secure Authentication, Hardware Root of Trust, Factory-Programmed Serial Number, I²C EEPROM, Anti-Counterfeiting