11AA02E48T-I/TT

Overview

The Microchip Technology 11AA02E48T-I/TT is a 2 Kbit Serial Electrically Erasable PROM organized in 256 x 8-bit blocks. It features a preprogrammed globally unique 48-bit EUI-48 node address and supports the UNI/O single I/O serial interface bus using Manchester encoding. The device operates within a voltage range of 1.8V to 5.5V, with typical active current of 1 mA and maximum standby current of 1 µA. It utilizes a 3-lead SOT-23 package and supports industrial temperature ranges from -40°C to +85°C.

Feature Summary

• Preprogrammed globally unique 48-bit node address compatible with EUI-48 standards
• Single I/O UNI/O serial interface bus utilizing Manchester encoding for clock and data
• Low-power CMOS technology with Schmitt trigger inputs for noise suppression
• Built-in write protection including power-on/off data protection and block write protection

Applications

• Microcontroller system identification and tracking
• Asset management and inventory control
• Secure hardware authentication nodes
• Embedded device configuration storage

Procurement Notes

Verify that the specific suffix 'I/TT' corresponds to the Industrial temperature range (-40°C to +85°C) and the SOT-23-3 package type as documented in the official datasheet. Confirm the presence of the preprogrammed 48-bit EUI-48 address during quality inspection, as this value is factory-set and cannot be altered by the end user. Ensure compatibility with host controllers supporting the UNI/O protocol.

Selection Notes

Select this component when a unique hardware identifier is required for each individual unit without external programming steps. The UNI/O interface minimizes pin count to three leads, suitable for space-constrained designs. Consider the 1.8V minimum operating voltage for low-power applications. Verify that the host microcontroller can implement the Manchester decoding logic required for the single-wire communication protocol.

Part Context

This part belongs to the 11AA02EXX family of 2 Kbit UNI/O serial EEPROMs manufactured by Microchip Technology. It is functionally similar to the 11AA02E64 but differs in its preprogrammed address length (48-bit vs. 64-bit). Both share the same memory organization, interface protocol, and electrical characteristics, differing primarily in the identity data burned into the factory.

Replacement Considerations

The 11AA02E64T-I/TT serves as a direct functional substitute if a 64-bit EUI-64 address is acceptable instead of the 48-bit EUI-48 address. Other 11AA02 series variants may replace this part only if the unique address feature is not critical to the application.