24AA256UID-I/ST

Memory IC Overview

The Microchip Technology 24AA256UID-I/ST 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 on a single supply ranging from 1.7V to 5.5V with a maximum clock frequency of 400 kHz for VCC ≥ 2.5V, or 100 kHz for lower voltages. The device utilizes a 2-wire I2C compatible interface and includes a 64-byte page write buffer. It supports up to eight devices on the same bus via configurable chip select inputs.

Memory IC Feature Summary

• Factory-programmed globally unique EUI-48 and EUI-64 node addresses alongside a 32-bit serial number stored in permanently write-protected memory regions.
• Supports bidirectional 2-wire serial communication with I2C compatibility, allowing cascading of up to eight devices on a single bus.
• Features Schmitt trigger inputs for noise suppression and output slope control to eliminate ground bounce during operation.

Memory IC Applications

• Device identification and tracking in personal communications systems
• Data acquisition applications requiring unique hardware identifiers
• Embedded systems needing non-volatile storage for network addressing

Memory IC Procurement Notes

Verify that the ordering suffix 'I' corresponds to the industrial temperature range (-40°C to +85°C) and '/ST' indicates the 8-lead TSSOP package. Confirm that the specific revision matches the required EUI/OUI assignments, as these are factory-programmed and cannot be altered. Ensure voltage levels align with the 1.7V to 5.5V operational specification.

Memory IC Selection Notes

Select this component when unique hardware identification is required without external configuration. It is suitable for designs needing low-power CMOS technology with standby currents as low as 100 nA. Consider the 64-byte page write capability for efficient data logging. Ensure the application environment stays within the specified industrial temperature limits and voltage ranges.

Memory IC Part Context

This part belongs to the 24AA256UID family of serial EEPROMs designed by Microchip Technology. It shares the core 256 Kbit architecture with standard variants but adds preprogrammed IEEE-compliant addressing capabilities. The UID series is distinct from the 24LC256 and 24FC256 due to its permanent write protection of the upper array sections containing identity data.

Memory IC Replacement Considerations

BR24T256FJ-WE2