24AA256T/SM

Memory IC Overview

The Microchip Technology 24AA256T/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 clock frequencies up to 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 SOIJ package and supports both random and sequential reads.

Memory IC Feature Summary

• Supports bidirectional two-wire serial interface bus compatible with I2C protocol
• Features a 64-byte page write buffer for efficient data storage operations
• Includes hardware write-protect functionality via the WP pin
• Equipped with Schmitt trigger inputs to suppress noise spikes

Memory IC Applications

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

Memory IC Procurement Notes

Verify that the ordering suffix 'SM' corresponds specifically to the 8-lead Small Outline J-Lead (SOIJ) package type as defined in the manufacturer's selection table. Confirm the temperature grade matches the required operational environment, as industrial and extended ranges are available within this family. Ensure compatibility with the system's I2C voltage levels before integration.

Memory IC Selection Notes

Select this component when a 256-Kbit EEPROM with I2C interface is required. The 24AA256 variant supports operation down to 1.7V, distinguishing it from the 2.5V minimum 24LC256. Choose the 'E' temperature grade for applications exceeding 85°C, or 'I' grade for standard industrial environments. Verify that the SOIJ package fits the PCB footprint constraints.

Memory IC Part Context

This part belongs to the 24XX256 family of 256-Kbit Serial EEPROMs manufactured by Microchip Technology. The family includes variants like 24LC256 and 24FC256, which differ primarily in voltage ranges and maximum clock speeds. The 24AA256 is optimized for low-voltage applications while maintaining high endurance and data retention specifications common to the series.

Memory IC Replacement Considerations

Direct substitutes include other 24AA256 variants with different packages such as 24AA256-I/SN (SOIC) or 24AA256-I/ST (TSSOP), provided the physical footprint allows. Cross-family replacements like 24LC256 require verifying voltage compatibility, as they operate at a minimum of 2.5V.