Integrating Advanced Node Identity with Robust Memory: The Microchip 24AA256UID-I/ST

In the rapidly evolving landscape of the Internet of Things (IoT) and connected devices, the need for reliable, secure, and uniquely identifiable components is paramount. The Microchip 24AA256UID-I/ST addresses these critical requirements by combining a high-density, dependable serial EEPROM with a globally unique node identity, making it an exceptional solution for modern electronic design.

This device is a 256Kbit I2C Serial EEPROM, organized as 32,768 words of 8 bits each. It supports the widely adopted I2C protocol, ensuring easy integration into a vast array of microcontrollers and systems. The memory features a page size of 64 bytes and boasts hardware write-protection, enhancing data security and integrity. Its extended voltage range (1.7V to 5.5V) and low power consumption make it ideal for both mains-powered and battery-operated applications, from industrial controllers to portable consumer electronics.

The defining feature of this IC is its pre-programmed, immutable EUI-64™ (Extended Unique Identifier) node identity. This 64-bit address is assigned and guaranteed to be unique by the IEEE® Registration Authority, providing a fundamental building block for creating uniquely identifiable network nodes. This is crucial for applications requiring secure device authentication, management in large-scale networks, and seamless connectivity in protocols like IPv6, where the EUI-64 can be used to derive a unique link-local address.

Designers benefit from the inherent security and simplification offered by the integrated EUI-64. It eliminates the need for a separate chip to handle unique identification, reduces board space, simplifies inventory management, and streamlines the manufacturing process. The combination of non-volatile memory and a unique ID on a single chip provides a powerful and compact solution for storing both application data and a secure identifier.

ICGOOODFIND: The Microchip 24AA256UID-I/ST is a superior choice for designers seeking to future-proof their IoT and networked products. It successfully merges the essential functionality of a high-reliability serial memory with the critical requirement for a globally unique identity, all in a single, space-efficient package. Its robust performance, ease of use, and integrated EUI-64 make it a cornerstone component for the next generation of connected devices.

Keywords: I2C EEPROM, EUI-64, Unique Identifier, IoT Device, Node Identity.