24AA02E48-I/SN

Memory IC Overview

The Microchip Technology 24AA02E48-I/SN is a 2 Kbit Electrically Erasable PROM organized as two blocks of 128 x 8-bit memory. It features a 2-wire serial I2C interface with a maximum clock frequency of 400 kHz (100 kHz below 2.5V). Operating on a single supply from 1.7V to 5.5V, it utilizes low-power CMOS technology with standby currents up to 1 µA. The device includes pre-programmed globally unique EUI-48™ node addresses and supports page writes of up to eight bytes.

Memory IC Feature Summary

• Pre-programmed with globally unique 48-bit EUI-48™ node addresses stored in the upper half of the array
• Compatible with standard 2-Wire Serial Interface (I2C) protocols for bidirectional data transmission
• Includes Schmitt trigger inputs and output slope control to suppress noise and eliminate ground bounce
• Features self-timed erase/write cycles with automatic write protection for the address range containing node identity

Memory IC Applications

• Network devices requiring unique hardware identification via IEEE standards
• Embedded systems needing non-volatile storage for configuration parameters
• Industrial control modules operating within extended temperature ranges
• IoT endpoints utilizing MAC address EEPROM functionality

Memory IC Procurement Notes

Verify that the ordering suffix 'I' corresponds to the Industrial temperature range (-40°C to +85°C) and 'SN' denotes the 8-lead SOIC package. Confirm the specific revision level matches design requirements. Ensure compatibility with system voltage levels between 1.7V and 5.5V. Check for RoHS compliance status if required by regulatory standards. Validate pinout alignment with PCB footprint specifications.

Memory IC Selection Notes

Select this component when a fixed, globally unique identifier is required without external programming overhead. The 8-byte page buffer optimizes write throughput compared to byte-write operations. Consider the 24AA02E64 variant if 64-bit addressing is necessary. This part lacks chip select pins (A0-A2), limiting bus expansion capabilities compared to other family members. Verify power consumption constraints against the specified active and standby current limits.

Memory IC Part Context

This device belongs to the 24AA02XEXX family of 2 Kbit serial EEPROMs designed for applications requiring permanent node identity. It shares architectural similarities with the 24AA025E48 but differs in page size and addressability. The 8-lead SOIC package provides a standard surface-mount solution compatible with automated assembly processes. It serves as a drop-in replacement for legacy MAC address storage solutions in networking hardware.

Memory IC Replacement Considerations

The 24AA02E48T-E/OT offers an alternative SOT-23-5 package option. The 24AA02E64 series provides 64-bit addressing instead of 48-bit. Cross-referencing requires verifying package dimensions and ensuring the absence of chip select pins does not conflict with existing bus designs.

Memory IC FAQ

Can the pre-programmed EUI-48™ node address be modified?

No, the node address is permanently write-protected and cannot be altered after manufacturing.

What is the write protection mechanism for the node address?

The upper half of the array (addresses 80h-FFh) is permanently write-protected, inhibiting any write operations to this range while allowing normal read access.

How does the device handle bus collisions during acknowledge polling?

During an internal write cycle, the device does not generate Acknowledge signals. The master can poll the bus by sending a write command; if no ACK is returned, the device is busy.