24AA256/SM

Memory IC Overview

The Microchip Technology 24AA256/SM is a 32K x 8 (256-Kbit) Serial Electrically Erasable PROM (EEPROM). It operates across a broad voltage range of 1.7V to 5.5V and supports I2C compatible two-wire serial interfaces with maximum clock frequencies up to 400 kHz. The device features a 64-byte page write buffer, hardware write-protect capability via the WP pin, and Schmitt trigger inputs for noise suppression. It offers data retention exceeding 200 years and endurance of over one million erase/write cycles.

Memory IC Feature Summary

• Supports bidirectional two-wire serial communication protocol compatible with standard I2C bus specifications.
• Includes a 64-byte page write buffer to facilitate efficient sequential data storage operations.
• Features hardware write protection controlled by the WP pin to prevent unintended memory modifications.
• Incorporates Schmitt trigger inputs on SDA and SCL lines to enhance noise spike suppression.

Memory IC Applications

• Personal communications devices requiring non-volatile data storage
• Data acquisition systems needing reliable parameter retention
• Industrial control applications utilizing I2C bus architectures

Memory IC Procurement Notes

Verify the specific suffix 'SM' corresponds to the 8-Lead SOIJ package type as defined in the official datasheet. Confirm that the operating voltage requirements align with the 1.7V to 5.5V specification for the 24AA256 variant. Ensure environmental temperature ratings match the intended application scope before finalizing procurement orders.

Memory IC Selection Notes

Select this component when a 256-Kbit EEPROM with low-power CMOS technology is required. It is suitable for applications demanding operation down to 1.7V. Consider the 8-Lead SOIJ package for surface mount implementations. Verify compatibility with existing I2C bus constraints and address pin configurations for multi-device setups.

Memory IC Part Context

This part belongs to the 24XX256 family of serial EEPROMs from Microchip Technology. The family includes variants like 24LC256 and 24FC256, which share similar functional descriptions but differ in voltage ranges and clock speeds. The 24AA256 specifically supports operation down to 1.7V, distinguishing it from higher voltage threshold counterparts within the same product line.

Memory IC Replacement Considerations

Direct replacements include other 24AA256 variants with different packages such as PDIP or MSOP. Cross-family substitutes like 24LC256 or 24FC256 may be considered if voltage and speed requirements permit, though electrical characteristics differ.