24AA256T-E/SN

Memory IC Overview

The Microchip Technology 24AA256T-E/SN is a 256-Kbit (32K x 8) serial electrically erasable programmable read-only memory (EEPROM). It operates on a single supply voltage ranging from 1.7V to 5.5V and supports I²C compatible two-wire serial communication with a maximum clock frequency of 400 kHz. The device features a 64-byte page write buffer, hardware write protection via the WP pin, and Schmitt trigger inputs for noise suppression. It is housed in an 8-lead SOIC package and is rated for extended industrial temperature operation from -40°C to +125°C.

Memory IC Feature Summary

• Supports cascading up to eight devices on the same bus using configurable chip select pins.
• Includes hardware write protection to inhibit array writes when the WP pin is tied high.
• Features output slope control to eliminate ground bounce during switching operations.

Memory IC Applications

• Personal communications systems requiring non-volatile data storage
• Data acquisition applications needing low-power memory solutions
• Industrial control systems operating across wide voltage ranges

Memory IC Procurement Notes

Verify that the ordering suffix 'SN' corresponds to the SOIC-8 package type as specified in the manufacturer's documentation. Confirm the 'E' suffix indicates the extended temperature range (-40°C to +125°C) rather than the industrial range. Ensure the 'T' suffix matches the required tape-and-reel packaging format for automated assembly processes.

Memory IC Selection Notes

Select this component when a 256-Kbit capacity is required with I²C interface compatibility. The 1.7V minimum operating voltage makes it suitable for low-voltage systems where other EEPROMs require higher thresholds. The extended temperature rating ensures reliability in harsh environments compared to standard industrial grade parts.

Memory IC Part Context

This part belongs to the 24AA256 family of serial EEPROMs manufactured by Microchip Technology. It shares functional similarities with the 24LC256 and 24FC256 series but differs in minimum operating voltage and maximum clock speed specifications. The 24AA256 variant specifically supports operation down to 1.7V, distinguishing it from the 2.5V minimum requirement of the 24LC256.

Memory IC Replacement Considerations

The 24LC256-E/SN serves as a direct physical replacement if the system voltage remains above 2.5V. For higher speed requirements within the same voltage range, the 24FC256-E/SN offers increased clock frequency capabilities while maintaining the same pinout and package configuration.