24AA025UID-I/SN

Memory IC Overview

The Microchip Technology 24AA025UID-I/SN is a 2 Kbit (256 x 8) serial EEPROM featuring a preprogrammed 32-bit unique serial number. It operates on a single supply voltage ranging from 1.7V to 5.5V with a maximum clock frequency of 400 kHz. The device utilizes an I²C-compatible 2-wire interface and includes a 16-byte page write buffer. It offers over one million erase/write cycles, data retention exceeding 200 years, and industrial temperature operation from -40°C to +85°C in an 8-lead SOIC package.

Memory IC Feature Summary

• Factory-programmed 32-bit unique serial number stored in the upper half of the array
• I²C compatible 2-wire serial interface supporting standard and fast modes
• Low-power CMOS technology with standby current as low as 1 µA
• Hardware write protection for the upper memory half containing the UID

Memory IC Applications

• Device identification and authentication in embedded systems
• Secure storage of unique identifiers for IoT endpoints
• Anti-counterfeiting and product traceability solutions
• Configuration storage requiring hardware-bound identity verification

Memory IC Procurement Notes

Verify that the specific part number suffix matches the required package type and temperature grade. Confirm that the UID family designation is present to ensure the factory-programmed serial number feature is included. Check datasheet revisions for any updates to electrical characteristics or pin configurations before finalizing procurement specifications.

Memory IC Selection Notes

Select this component when a unique hardware identifier is required alongside standard non-volatile data storage. The 24AA025UID variant provides a larger page write buffer compared to the 24AA02UID, facilitating more efficient data writes. Ensure the system design supports the I²C bus protocol and accommodates the specific address bits for chip selection if multiple devices are used on the same bus.

Memory IC Part Context

This component belongs to the 24AA02XUID series of 2 Kbit serial EEPROMs manufactured by Microchip Technology. The series distinguishes itself by integrating a permanent, unalterable serial number into the memory structure. This integration allows for direct hardware-based identification without relying on external security elements or software-generated keys.

Memory IC Replacement Considerations

The 24AA02UID serves as a functional alternative within the same family, offering identical electrical characteristics but with an 8-byte page write buffer instead of 16 bytes.