24AA256-E/ST

Memory IC Overview

The Microchip Technology 24AA256-E/ST is a 32K x 8 (256-Kbit) Serial Electrically Erasable PROM (EEPROM). It operates on a single supply voltage ranging from 1.7V to 5.5V and supports I2C compatible two-wire serial interface communication with clock frequencies up to 400 kHz. The device features a page write capability of up to 64 bytes, hardware write-protect functionality, and Schmitt trigger inputs for noise suppression. It is available in an 8-lead TSSOP package and supports extended temperature ranges.

Memory IC Feature Summary

• Supports bidirectional two-wire serial data transmission protocol
• Includes hardware write-protect pin for array security
• Features Schmitt trigger inputs for improved noise spike suppression
• Provides output slope control to eliminate ground bounce

Memory IC Applications

• Personal communications devices
• Data acquisition systems
• Advanced low-power applications

Memory IC Procurement Notes

Verify the specific suffix 'E' indicates Extended temperature range (-40°C to +125°C) and 'ST' denotes the 8-TSSOP package. Confirm RoHS compliance status as per current datasheet revisions. Ensure the application circuit includes appropriate pull-up resistors on SDA and SCL lines based on the selected bus speed.

Memory IC Selection Notes

Select this component when a 256-Kbit non-volatile memory solution is required with I2C compatibility. The 24AA256 variant specifically supports operation down to 1.7V, unlike the 24LC256 which requires a minimum of 2.5V. Consider the 8-TSSOP package for surface-mount assembly requirements.

Memory IC Part Context

This part belongs to the 24XX256 family of 256-Kbit I2C Serial EEPROMs manufactured by Microchip Technology. The family includes variants such as the 24LC256 and 24FC256, which differ primarily in operating voltage ranges and maximum clock frequencies. The 24AA256 is optimized for low-power applications requiring wide voltage operation.

Memory IC Replacement Considerations

The 24LC256-E/ST serves as a functional substitute but requires a minimum supply voltage of 2.5V instead of 1.7V. The 24FC256-E/ST offers higher clock frequency support up to 1 MHz at voltages above 2.5V. Verify voltage compatibility before substitution.