Microchip 24AA256UIDT-I/ST: 128-Kbit I2C Serial EEPROM with Pre-Programmed Unique EUI-64™ Node Identity

In the rapidly evolving world of embedded systems and IoT, the need for reliable, non-volatile memory with integrated identity capabilities is paramount. The Microchip 24AA256UIDT-I/ST addresses this need by combining a high-capacity 128-Kbit I2C Serial EEPROM with a factory pre-programmed, globally unique EUI-64™ Node Identity. This integration simplifies design, enhances security, and accelerates time-to-market for a wide range of applications.

This device offers a robust 256Kbit (32K x 8) memory array with a page size of 64 bytes. It supports the widely adopted I2C serial interface, operating at speeds up to 400 kHz, ensuring compatibility with a vast ecosystem of microcontrollers and processors. The EEPROM features hardware write-protection, a 1.7V to 5.5V wide voltage range operation, and low power consumption, making it suitable for both line-powered and battery-powered devices.

The defining feature of this IC is its pre-programmed, unique 64-bit Extended Unique Identifier (EUI-64). This immutable identifier is assigned by the IEEE Authority, guaranteeing global uniqueness. This eliminates the complex and costly steps of sourcing, managing, and programming unique MAC addresses or node IDs during manufacturing. For developers, this means a guaranteed unique node identity is available instantly upon power-up, which is crucial for network authentication, secure communication, and device management in IoT networks.

Typical applications are vast and include:

IoT Sensor Nodes and Network Peripherals: Providing a unique MAC address for Ethernet or IEEE 802.15.4 (Zigbee, Thread) stacks.

Industrial Control Systems: For asset tracking, secure device identification, and configuration storage.

Consumer Electronics: Storing calibration data, user settings, and a unique product ID.

Medical Devices: Ensuring secure identification and storage of critical device parameters.

In summary, the 24AA256UIDT-I/ST is more than just memory; it is a comprehensive solution for data storage and secure identity.

ICGOOODFIND: The Microchip 24AA256UIDT-I/ST is a highly integrated solution that successfully merges substantial non-volatile memory with a critical unique identity function. Its value proposition lies in simplifying the manufacturing process, enhancing device security through a globally unique ID, and providing design flexibility with its standard I2C interface and wide voltage range. It is an optimal choice for designers aiming to build connected, secure, and easily identifiable devices.

Keywords:

1. I2C Serial EEPROM

2. EUI-64™ Node Identity

3. Unique Identifier

4. Non-Volatile Memory

5. IoT Device Management