The 24AA025E48-I/SN: A Pre-Programmed Identity Solution for Embedded Systems

In the expanding universe of the Internet of Things (IoT) and networked devices, establishing a unique, globally recognized identity for each node is a fundamental requirement. The Microchip 24AA025E48-I/SN addresses this critical need directly by combining a reliable 2Kbit Serial EEPROM with a factory pre-programmed, universally unique EUI-48™ node identity. This integration simplifies design, accelerates time-to-market, and enhances security for a vast array of connected applications.

This device is built around a robust 16-byte page (2Kbit) I²C™ compatible serial EEPROM memory array. It supports a wide voltage range (1.7V to 5.5V) and features hardware write-protection, making it suitable for both low-power and mainstream applications. The memory is organized in a 16-byte page structure, allowing for efficient writing of small data blocks, and boasts high endurance and long data retention.

The defining feature of the 24AA025E48 is its pre-programmed, guaranteed unique EUI-48™ (Extended Unique Identifier) address. This 48-bit identifier, programmed by Microchip in accordance with IEEE® standards, is burned into the first six bytes of the memory array at addresses 0xF8 through 0xFD. This eliminates the need for manufacturers to source, manage, and program their own MAC addresses, streamlining the manufacturing and logistics process significantly. Designers can simply read this immutable identifier upon system startup to provide their product with a ready-made network identity.

Typical applications that benefit immensely from this integrated solution include:

IoT Sensor Nodes and Modules

Networked Peripherals and Switches

Medical and Industrial Control Systems

Any device requiring a factory-set MAC address

The device is offered in the space-saving 8-lead SOIC package, ensuring a minimal footprint on the PCB.

ICGOOODFIND: The Microchip 24AA025E48-I/SN is an elegant and highly efficient solution for embedding a unique node identity into connected devices. By merging non-volatile memory with a pre-programmed EUI-48, it reduces design complexity, minimizes supply chain overhead, and provides a foundation of trust through its guaranteed unique identifier, making it an excellent choice for modern embedded designs.

Keywords: EUI-48, Serial EEPROM, Unique Identifier, I²C Memory, IoT Node