Microchip 24AA02E48T-I/SN: A 2Kb I²C Serial EEPROM with a Pre-Programmed EUI-48™ Node Identity

In the world of connected devices, establishing a unique and globally identifiable network presence is fundamental. The Microchip 24AA02E48T-I/SN addresses this critical need by combining a reliable 2Kbit I²C Serial EEPROM memory with a factory pre-programmed, globally unique EUI-48™ node identity. This integration simplifies design, reduces component count, and accelerates time-to-market for a vast array of networked applications.

This device serves a dual purpose. Primarily, it operates as a standard 2Kbit (256 x 8) serial EEPROM, featuring the ubiquitous I²C protocol for communication. It supports a 400 kHz clock rate and offers essential features like hardware write-protection and a page write buffer of 16 bytes. This makes it ideal for storing application data, configuration parameters, or calibration constants in systems ranging from consumer electronics to industrial equipment.

Its defining characteristic, however, is the embedded EUI-48™ (Extended Unique Identifier-48) address. This 48-bit number is pre-programmed by Microchip into a dedicated, read-only memory space, guaranteeing its uniqueness worldwide according to IEEE® standards. This eliminates the need for manufacturers to source, manage, and program their own MAC addresses, streamlining the production process and ensuring compliance with network identity requirements. The EUI-48 is directly accessible over the I²C interface from a reserved memory location.

The 24AA02E48T-I/SN is housed in a space-saving 8-lead SN package, making it suitable for compact, space-constrained designs. Its availability in an industrial temperature range (-40°C to +85°C) ensures reliable operation in demanding environments. Key applications include any device requiring a unique MAC address, such as Ethernet controllers, Wi-Fi modules, Zigbee/Thread networks, and other connected IoT sensor nodes.

ICGOOODFIND: The Microchip 24AA02E48T-I/SN is an ingenious solution that merges essential non-volatile memory with a hardwired, unique network identity. It is an indispensable component for designers seeking to simplify their bill of materials, enhance security, and ensure seamless connectivity for their IoT and networked products.

Keywords: EUI-48, I²C EEPROM, MAC Address, Unique Identifier, IoT Connectivity.