The 24AA025UIDT-I/OT: A Pre-Programmed Identity Solution for Secure Connected Devices

In the expanding universe of the Internet of Things (IoT), securely and uniquely identifying each connected device is a fundamental challenge. Microchip Technology's 24AA025UIDT-I/OT addresses this need head-on, offering more than just standard non-volatile memory. This 2Kbit I2C Serial EEPROM is a specialized solution that combines reliable data storage with a factory pre-programmed, unchangeable unique identifier, making it an essential component for modern networked systems.

The core feature that distinguishes this IC from a standard EEPROM is its pre-programmed node identity. Each device comes from the factory with a globally unique EUI-48™ or EUI-64™ address stored in a reserved memory space. This identity is administered by the IEEE Registration Authority, guaranteeing its uniqueness worldwide. This eliminates the need for manufacturers to source, manage, and program their own MAC addresses, significantly simplifying the production process and reducing overhead.

Built on a robust EEPROM foundation, the 24AA025UIDT-I/OT provides 256 bytes of general-purpose, byte-alterable memory. It supports the ubiquitous I2C protocol, operating across a broad voltage range (1.7V to 5.5V), making it compatible with a wide array of microcontrollers and processors. Its small SOT-23-5 package is ideal for space-constrained PCB designs. Key features like 1 million erase/write cycle endurance and data retention exceeding 200 years ensure long-term reliability for the stored data and the critical node identity.

The applications for this integrated identity solution are vast. It is perfectly suited for any device requiring a unique MAC address for network interfaces, including Ethernet controllers, Wi-Fi modules, and Bluetooth adapters. Beyond traditional networking, it is invaluable for creating unique serial numbers for system configuration, asset tracking, and authentication in IoT sensor nodes, industrial controllers, and consumer electronics.

ICGOOODFIND: The Microchip 24AA025UIDT-I/OT is far more than simple memory; it is a foundational security and identity component. By providing a guaranteed-unique, pre-programmed EUI-48/64™ address, it streamlines manufacturing, enhances security, and ensures interoperability in connected devices, making it an excellent choice for designers building the next generation of IoT products.

Keywords: Unique Identifier, EUI-64, I2C EEPROM, MAC Address, IoT Security.