Microchip 25AA02E48T-I/SN: A 2Kb SPI Serial EEPROM with a Factory-Programmed EUI-48™ Node Identity

In the rapidly evolving landscape of the Internet of Things (IoT) and connected devices, the need for secure, efficient, and uniquely identifiable hardware components has never been greater. The Microchip 25AA02E48T-I/SN addresses this critical requirement by combining a reliable 2Kbit SPI Serial EEPROM with a pre-programmed, globally unique EUI-48™ node identifier, making it an essential solution for modern embedded designs.

This device is built around a high-performance Serial Peripheral Interface (SPI), ensuring fast and straightforward communication with a wide range of host microcontrollers. The 2Kbit (256 x 8) memory array is organized in 16-byte pages and features advanced write protection controls, including a dedicated Write-Enable Latch (WEL) and both volatile and non-volatile protection modes. This ensures robust data integrity in applications where frequent configuration updates or data logging are required.

The standout feature of the 25AA02E48T-I/SN is its factory-lasered EUI-48™ address. This 48-bit Extended Unique Identifier is programmed into a dedicated, read-only memory space during manufacturing. This eliminates the significant logistical challenge and potential errors associated with manually programming MAC addresses during board assembly. By providing a guaranteed globally unique identity straight from the factory, this EEPROM simplifies network enrollment, enhances security by preventing address conflicts, and accelerates product development cycles.

Housed in a space-saving 8-lead SOIC package, the device is ideal for compact and power-sensitive applications. It operates over an extensive voltage range (1.8V to 5.5V) and across a broad industrial temperature range (-40°C to +85°C), guaranteeing consistent performance in demanding environments.

Typical applications are vast and include:

Network Interface Controllers (NICs) for unique MAC address storage.

IoT Sensor Nodes and modules requiring a unique identity for cloud connectivity.

Medical Devices and equipment where secure, unique identification is paramount.

Factory Automation and control systems for device management and tracking.

ICGOODFIND: The Microchip 25AA02E48T-I/SN is far more than a simple memory chip; it is a comprehensive identity and storage solution. Its integration of non-volatile memory with a pre-programmed, unique hardware address reduces system complexity, bolsters security, and significantly speeds up time-to-market for connected products, establishing it as a key enabler for the next generation of networked devices.

Keywords:

SPI EEPROM

EUI-48™ Identifier

Globally Unique MAC Address

IoT Connectivity

Embedded Memory