25AA02UID-I/SN

Memory IC Overview

The Microchip Technology 25AA02UID-I/SN is a 2 Kbit Serial Electrically Erasable Programmable Read-Only Memory (EEPROM) featuring a factory-programmed, unique 32-bit serial number. It utilizes an SPI-compatible interface with a maximum clock frequency of 10 MHz and operates within a supply voltage range of 1.8V to 5.5V. The device offers 256 x 8-bit organization, supports page writes up to 16 bytes, and provides block write protection for the upper quarter of the array where the serial number resides.

Memory IC Feature Summary

• Factory-programmed 32-bit unique serial number stored in the upper quarter of the memory array
• SPI compatible serial bus interface supporting sequential read and page write modes
• Hardware and software write protection mechanisms including power-on data protection and block protection bits

Memory IC Applications

• Device identification and authentication systems requiring unique hardware IDs
• Secure storage of calibration parameters or configuration data
• Inventory tracking and asset management applications

Memory IC Procurement Notes

Verify that the ordering suffix matches the required package type and temperature grade. Confirm RoHS compliance status if restricted materials are prohibited. Ensure the specific revision of the datasheet aligns with the manufacturing lot date code for accurate electrical characteristics.

Memory IC Selection Notes

Select this component when a unique hardware identifier is required alongside standard non-volatile storage capabilities. The 25AA02UID is suitable for designs needing secure, unchangeable device IDs protected by factory-set block write protection. Consider the industrial temperature range and low-power CMOS technology for energy-constrained environments.

Memory IC Part Context

This part belongs to the 25AA UID family of serial EEPROMs from Microchip Technology. These devices integrate standard EEPROM functionality with preprogrammed unique identifiers. The 'I' suffix denotes the industrial temperature range, while '/SN' indicates the SOIC-8 package option.

Memory IC Replacement Considerations

Direct replacements include other members of the 25AA UID family such as the 24AA02UID for I2C interfaces or higher density variants like the 25AA04UID. Verify pin compatibility and memory organization before substitution.