24AA256-I/SN

Memory IC Overview

The Microchip Technology 24AA256-I/SN is a 256-Kbit (32K x 8) 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 with maximum clock frequencies of 100 kHz for VCC < 2.5V and 400 kHz for VCC ≥ 2.5V. 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 is housed in an 8-Lead SOIC package and supports industrial temperature ranges.

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 protection controlled by the WP pin to inhibit write operations while maintaining read access.
• Features output slope control designed to eliminate ground bounce during operation.

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 for configuration data

Memory IC Procurement Notes

Verify that the ordering suffix 'I' corresponds to the Industrial temperature range (-40°C to +85°C) and 'SN' denotes the 8-Lead SOIC package. Confirm RoHS compliance status as specified in the manufacturer's documentation. Ensure the specific revision level matches the design requirements before finalizing procurement orders.

Memory IC Selection Notes

Select this component when a broad voltage operation down to 1.7V is required alongside standard I2C compatibility. It is suitable for designs needing hardware-level write protection and high endurance. Consider the 8-Lead SOIC package constraints regarding board space and thermal dissipation compared to smaller surface mount alternatives.

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 the 24LC256 and 24FC256, which differ primarily in minimum operating voltage and maximum clock frequency specifications. The 24AA256 variant specifically targets applications requiring operation at lower supply voltages starting at 1.7V.

Memory IC Replacement Considerations

Direct substitutes within the same package include other 24AA256 variants with different suffixes such as 24AA256-I/MS or 24AA256-I/MF. Cross-family replacements like the 24LC256 require verification of voltage level compatibility, as it typically requires a minimum of 2.5V.