25AA02E64-I/SN

Memory IC Overview

The Microchip Technology 25AA02E64-I/SN is a 2 Kbit Serial Electrically Erasable Programmable Read-Only Memory (EEPROM) featuring a 256 x 8-bit organization. It operates on an SPI-compatible serial bus with a maximum clock frequency of 10 MHz at 5.5V supply voltage. The device supports a supply voltage range of 1.8V to 5.5V and includes a factory-programmed, globally unique 64-bit EUI-64™ node address stored in the upper quarter of the array. It utilizes low-power CMOS technology with standby current as low as 1 µA.

Memory IC Feature Summary

• Factory-programmed globally unique 64-bit EUI-64™ node address for device identification
• SPI-compatible serial interface supporting sequential read and write page modes
• Hardware and software write protection mechanisms including block protection and power-on data protection
• High reliability with one million erase/write cycles and over 200 years data retention

Memory IC Applications

• System identification and authentication in embedded networks
• Configuration storage for microcontroller-based systems
• Device tracking and inventory management using unique node addresses

Memory IC Procurement Notes

Verify that the specific part number suffix matches the required package type and temperature grade. Confirm the presence of the EUI-64™ node address programming if unique identification is critical for the application design. Ensure compatibility with the host system's SPI voltage levels and timing requirements before finalizing procurement.

Memory IC Selection Notes

Select this component when a small non-volatile memory with a built-in unique identifier is required. It is suitable for applications needing hardware-level device authentication without external security chips. Consider the industrial temperature range and robust write protection features for reliable operation in demanding environments.

Memory IC Part Context

This device belongs to the 25AA02EXX family of 2 Kbit SPI EEPROMs. It shares functional similarities with the 25AA02E48 but differs in the preprogrammed node address format, offering a native 64-bit EUI-64™ address instead of a 48-bit EUI-48™ address. Both variants utilize the same 8-lead SOIC package and electrical specifications.

Memory IC Replacement Considerations

The 25AA02E48-I/SN is a compatible alternative within the same family, differing only in the preprogrammed node address size (EUI-48™ vs. EUI-64™). Other 2 Kbit SPI EEPROMs may require significant firmware changes due to differences in instruction sets or pin configurations.