25AA02E64T-I/OT

Memory IC Overview

The Microchip Technology 25AA02E64T-I/OT is a 2 Kbit Serial Electrically Erasable Programmable Read-Only Memory (EEPROM) utilizing a Serial Peripheral Interface (SPI). It features a 256 x 8-bit organization with a 16-byte page size. The device operates within a supply voltage range of 1.8V to 5.5V and supports clock frequencies up to 10 MHz at higher voltages. It includes a factory-programmed, globally unique 64-bit EUI-64 node address stored in the upper portion of the array. Key electrical characteristics include a maximum standby current of 1 µA at 2.5V and an endurance rating of 1,000,000 erase/write cycles.

Memory IC Feature Summary

• Factory-programmed with a globally unique 64-bit EUI-64 node address for direct system identification
• Integrated hardware write protection via dedicated WP pin and nonvolatile block protection bits
• Supports serial communication pausing through a HOLD input without resetting the transmission sequence
• Includes power-on/off data protection circuitry and a write enable latch to prevent inadvertent writes

Memory IC Applications

• Systems requiring unique device identification using IEEE EUI-64 standards
• Embedded applications needing secure configuration storage with hardware-level write protection
• Multi-device SPI bus networks requiring individual node addressing

Memory IC Procurement Notes

Verify that the specific ordering suffix matches the required temperature grade and package type. Confirm the presence of the EUI-64 identifier by checking the datasheet or manufacturer documentation, as variants exist with different preprogrammed addresses. Ensure compatibility with the target system's SPI voltage levels and clock speed requirements before finalizing procurement.

Memory IC Selection Notes

Select this component when a unique hardware identifier is required alongside standard EEPROM functionality. The EUI-64 address eliminates the need for software-based MAC address generation. Consider the SOT-23-6 package for space-constrained designs. Verify that the application can accommodate the 16-byte page write limitation to ensure efficient memory management.

Memory IC Part Context

This part belongs to the 25AA02EXX family of 2 Kbit SPI EEPROMs. It shares the same physical interface and electrical specifications as the 25AA02E48 variant, differing primarily in the length of the factory-programmed node address. Both devices utilize the same instruction set and memory organization, allowing for functional interchangeability if unique addressing is not strictly required.

Memory IC Replacement Considerations

The 25AA02E48T-I/OT serves as a direct substitute if a 48-bit EUI-48 address is acceptable. Other 25AA02 series devices may replace it if the unique address feature is not utilized in the design.