Microchip 24AA02UIDT-I/OT: A 2-Kbit I²C Serial EEPROM with Pre-Programmed Unique EUI-64™ Node Identity

In the rapidly expanding world of the Internet of Things (IoT), secure and unique device identification is paramount. The Microchip 24AA02UIDT-I/OT addresses this critical need by combining a standard 2-Kbit serial EEPROM memory with a factory pre-programmed, globally unique 64-bit node identifier. This integration simplifies design, enhances security, and provides a ready-made solution for network enrollment and management.

This device is built on a robust and industry-standard I²C serial interface, operating across a broad voltage range (1.7V to 5.5V), making it suitable for a wide array of applications from consumer electronics to industrial systems. The EEPROM array is organized as a block of 256 x 8-bit memory, offering reliable data storage with a minimum of 1,000,000 erase/write cycles and built-in hardware write-protection for added security.

The defining feature of the 24AA02UIDT-I/OT is its pre-programmed EUI-64™ (Extended Unique Identifier) node identity. This 64-bit address is programmed at the factory and is guaranteed to be unique, adhering to the IEEE® 802 standard. This eliminates the significant logistical challenge and potential security risk of manually programming unique IDs during manufacturing. Developers can leverage this immutable identifier as a fundamental root of trust for their systems.

The applications for this powerful combination are vast. It is ideally suited for Ethernet MAC address storage, IPv6 autoconfiguration, and unique serial number implementation in any connected device. By providing a guaranteed-unique hardware address, it streamlines the process of connecting devices to networks and cloud services, ensuring no two nodes conflict. This capability is crucial for scaling IoT deployments efficiently and securely.

Housed in a space-saving SOT-23-5 package, the device offers a compact footprint for space-constrained designs. Its low-power consumption characteristics further ensure compatibility with battery-operated portable applications.

ICGOOODFIND: The Microchip 24AA02UIDT-I/OT is an elegant and efficient solution that solves a core challenge in modern electronics: secure and unique identification. By merging essential non-volatile memory with a factory-lasered EUI-64™ identifier, it reduces manufacturing complexity, enhances security, and future-proofs devices for seamless integration into networked environments, particularly the Internet of Things.

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