24AA256-E/MF

Memory IC Overview

The Microchip Technology 24AA256-E/MF is a 32K x 8 (256 Kbit) Serial Electrically Erasable PROM. It operates on a single supply voltage ranging from 1.7V to 5.5V and supports I2C compatible two-wire serial interface with a maximum clock frequency of 400 kHz. The device features a 64-byte page write buffer, hardware write-protect capability, and Schmitt trigger inputs for noise suppression. It is available in an 8-lead DFN package and supports extended temperature ranges from -40°C to +125°C.

Memory IC Feature Summary

• Supports cascading up to eight devices on the same bus using functional address lines A0, A1, and A2.
• Includes hardware write-protect functionality via the WP pin to inhibit write operations while maintaining read access.
• Features output slope control designed to eliminate ground bounce during signal transitions.

Memory IC Applications

• Personal communications systems requiring low-power non-volatile storage
• Data acquisition applications needing reliable parameter retention
• Embedded systems utilizing I2C bus architecture

Memory IC Procurement Notes

Verify that the ordering suffix 'MF' corresponds specifically to the 8-lead DFN package type as documented in official datasheets. Confirm the 'E' suffix indicates the extended temperature range specification (-40°C to +125°C). Ensure compatibility with the required I2C bus voltage levels before integration into the design.

Memory IC Selection Notes

Select this component when operation below 2.5V is required, as it supports voltages down to 1.7V unlike the 24LC256 variant. Choose the E-temperature grade for environments exceeding standard industrial limits. Verify that the DFN package footprint aligns with the PCB layout constraints and thermal requirements of the target application.

Memory IC Part Context

This part belongs to the 24XX256 family of 256-Kbit Serial EEPROMs manufactured by Microchip Technology. The family includes variants such as the 24LC256 and 24FC256, which differ primarily in minimum operating voltage and maximum clock frequency specifications. The 24AA256 is optimized for low-power applications across a broad voltage range.

Memory IC Replacement Considerations

The 24LC256 serves as a functional alternative but requires a minimum supply voltage of 2.5V. The 24FC256 offers higher speed capabilities up to 1 MHz at voltages above 2.5V. Substitution requires verification of voltage headroom and timing constraints within the system design.