24AA256UIDT-I/SN

Memory IC Overview

The Microchip Technology 24AA256UIDT-I/SN is a 32K x 8 (256 Kbit) Serial Electrically Erasable PROM featuring preprogrammed EUI-48 and EUI-64 node addresses and a 32-bit Unique ID. It operates across a broad voltage range of 1.7V to 5.5V with a maximum clock frequency of 400 kHz. The device utilizes a 2-wire I2C compatible interface, supports page writes up to 64 bytes, and offers data retention exceeding 200 years. It is housed in an 8-SOIC package.

Memory IC Feature Summary

• Preprogrammed globally unique 48-bit or 64-bit node addresses compatible with EUI standards
• Factory programmed 32-bit serial number stored in permanently write-protected memory
• Low-power CMOS technology with typical standby current of 100 nA
• Schmitt trigger inputs for noise suppression and output slope control

Memory IC Applications

• Personal communications devices requiring unique identification
• Data acquisition systems needing persistent non-volatile storage
• Network nodes requiring IEEE-compliant addressing
• Embedded systems utilizing I2C bus architecture

Memory IC Procurement Notes

Verify the specific suffix 'SN' corresponds to the SOIC package variant when ordering. Confirm that the industrial temperature grade (-40°C to +85°C) meets application requirements. Ensure the design accounts for the permanently write-protected upper array section containing factory-programmed identifiers. Check RoHS compliance status against current manufacturing notices.

Memory IC Selection Notes

Select this component when unique hardware identification via EUI-48/EUI-64 is required without external components. Choose over standard EEPROMs if address collision avoidance on shared buses is critical. Consider the 64-byte page write buffer for efficient data throughput. Verify voltage compatibility as operation down to 1.7V is supported for lower power designs.

Memory IC Part Context

This part belongs to the 24AA256UID family of serial EEPROMs from Microchip Technology. It shares core electrical characteristics with other 256Kbit variants but is distinguished by its factory-programmed unique identifiers. The UID series integrates hardware-level identity management directly into the memory structure, simplifying system design for tracking and authentication applications.

Memory IC Replacement Considerations

BR24T256FJ-WE2

Memory IC FAQ

Is the preprogrammed serial number writable?

No, the 32-bit serial number and node addresses are stored in the upper 1/8th of the EEPROM array which is permanently write-protected.

How many devices can be connected to a single I2C bus?

Up to eight devices can be cascaded on the same bus using the A0, A1, and A2 chip select pins to differentiate addresses.