Integrating Unique Node Identity in Compact Designs with the Microchip 24AA025UIDT-I/SN

In the expanding universe of the Internet of Things (IoT) and networked devices, the need for unique, factory-programmed identification is paramount. The Microchip 24AA025UIDT-I/SN addresses this critical requirement by combining a reliable 2Kbit I2C Serial EEPROM with an integrated EUI-48™ (Extended Unique Identifier) node identity. This powerful combination simplifies design and ensures each product can be uniquely recognized on any network.

This device serves a dual purpose. Primarily, it offers 2 Kbits of byte-alterable memory organized in a 256 x 8-bit block. It supports the ubiquitous I2C protocol, 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 built-in write-protect pin provides additional security for sensitive data.

Its most significant feature, however, is the integrated EUI-48 address. This 64-bit node identity is pre-programmed by Microchip, comprising a 24-bit company ID (OUI) and a 40-bit unique extension. This eliminates the need for manufacturers to source, manage, and program their own unique MAC addresses, streamlining production and reducing costs. The EUI-48 is stored in a dedicated, read-only memory space, guaranteeing its integrity and permanence.

The benefits for designers are substantial. It dramatically simplifies network enrollment for devices, as each one inherently possesses a globally unique identifier for Ethernet, Wi-Fi, Bluetooth, or other IEEE 802-based networks. This is crucial for automating large-scale deployments in smart homes, industrial automation, and sensor networks. Furthermore, its tiny SN package (8-lead SOIC) is ideal for space-constrained PCB designs.

ICGOOODFIND: The Microchip 24AA025UIDT-I/SN is an essential component for modern connected device design. It elegantly solves the challenge of securing unique network identities by merging a versatile non-volatile memory with a hardwired, globally unique EUI-48 identifier, thereby reducing system cost, simplifying logistics, and accelerating time-to-market for IoT products.

Keywords: EUI-48, Unique Identifier, I2C EEPROM, Node Identity, IoT Device