11AA02E64T-I/TT

Overview

The Microchip Technology 11AA02E64T-I/TT is a 2 Kbit Serial Electrically Erasable PROM organized in 256 x 8-bit blocks. It features a preprogrammed globally unique 64-bit Node Address compatible with EUI-64 standards and utilizes the UNI/O single I/O serial interface bus. The device operates within a voltage range of 1.8V to 5.5V, supporting an industrial temperature range from -40°C to +85°C. Key electrical characteristics include a maximum bit rate of 100 kbps, typical active current of 1 mA, and maximum standby current of 1 µA. It offers high reliability with over 1,000,000 erase/write cycles and data retention exceeding 200 years.

Feature Summary

• Preprogrammed globally unique 64-bit node address compliant with EUI-64 standards
• Single I/O UNI/O serial interface utilizing Manchester encoding for combined clock and data transmission
• Integrated block write protection allowing configuration to protect none, one-quarter, one-half, or all memory segments
• Built-in power-on/off data protection circuitry and self-timed write cycle with auto-erase capability

Applications

• Device identification and authentication in embedded systems
• Node addressing in distributed sensor networks
• Secure storage of unique identifiers in low-pin-count applications
• Configuration memory for microcontrollers requiring minimal interface lines

Procurement Notes

Verify that the specific suffix 'I' corresponds to the Industrial temperature range (-40°C to +85°C) and 'TT' indicates the SOT-23-3 package. Confirm the 'E64' designation ensures the presence of the 64-bit EUI-64 address rather than the 48-bit variant. Ensure the source documentation explicitly supports these parameter mappings for this exact part number before finalizing procurement specifications.

Selection Notes

Select this component when a system requires a unique hardware identifier integrated directly into non-volatile memory without additional address pins. The UNI/O interface is suitable for designs constrained by available GPIO lines. Consider the 1.8V minimum operating voltage for compatibility with low-power logic families. Evaluate the page-write buffer size against application throughput requirements to optimize write performance.

Part Context

This device belongs to the 11AA02EXX family of 2 Kbit UNI/O serial EEPROMs manufactured by Microchip Technology. It shares functional similarities with the 11AA02E48 but differs specifically in its preprogrammed address length. The family is designed for applications needing compact footprints and robust identity management capabilities within industrial-grade environments.

Replacement Considerations

The 11AA02E48T-I/TT serves as a direct substitute if the system architecture accommodates a 48-bit EUI-48 address instead of the required 64-bit format. Verify pinout compatibility and software driver support for the UNI/O protocol remains unchanged during substitution.