The 24AA025E48-E/SN: A Pre-Programmed Identity Solution for Connected Devices

In the expanding universe of the Internet of Things (IoT), every connected device requires a globally unique identifier to communicate effectively and securely on a network. The Microchip 24AA025E48-E/SN addresses this fundamental need by combining a reliable 2Kbit Serial EEPROM with a factory pre-programmed EUI-48™ node identity, simplifying design and accelerating time-to-market for countless applications.

This integrated circuit is built around a robust 2Kbit I²C serial EEPROM memory array, organized as 256 x 8 bits. It features a wide voltage operation range (1.7V to 5.5V), exceptionally low power consumption, and high reliability, making it suitable for both consumer and industrial environments. The built-in write-protect pin provides additional hardware security for sensitive memory segments.

The defining feature of the 24AA025E48-E/SN is its pre-programmed EUI-48™ address. An EUI-48 (Extended Unique Identifier-48) is a 48-bit number—a globally unique MAC address—that is permanently burned into the device by Microchip. This pre-programming guarantees that every unit has a unique identifier, eliminating the need for manual address management and preventing costly address conflicts within networks. This is invaluable for manufacturers building devices like network modules, sensors, and smart appliances, ensuring seamless and secure integration into larger ecosystems like Ethernet, Bluetooth, or Zigbee networks.

Housed in a space-saving 8-lead SOIC package, this EEPROM is designed for high-density board layouts. Its I²C serial interface ensures simple connectivity to a host microcontroller with minimal pin requirements, streamlining PCB design and reducing overall system cost.

ICGOOODFIND: The Microchip 24AA025E48-E/SN is an efficient and cost-effective solution that provides essential non-volatile memory and a critical, guaranteed-unique network identity in a single package. It is an ideal choice for designers seeking to simplify logistics, enhance security, and accelerate the deployment of connected IoT devices.

Keywords: EUI-48, Serial EEPROM, I²C Interface, Unique Identifier, IoT Device Networking.