24LC256-I/SM

Memory IC Overview

The Microchip Technology 24LC256-I/SM is a 32K x 8 (256-Kbit) Serial Electrically Erasable PROM (EEPROM). It operates on a single supply voltage ranging from 2.5V to 5.5V and supports a maximum clock frequency of 400 kHz via a two-wire I2C compatible interface. The device features a 64-byte page write buffer, hardware write-protect capability, and Schmitt trigger inputs for noise suppression. It is housed in an 8-lead SOIJ package and is rated for 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 a 64-byte page write buffer to facilitate efficient data writing operations.
• Features hardware write protection controlled by the WP pin to secure memory arrays.

Memory IC Applications

• Personal communications systems requiring non-volatile data storage
• Data acquisition applications needing low-power operation
• Industrial control systems utilizing I2C serial interfaces

Memory IC Procurement Notes

Verify that the specific ordering suffix corresponds to the required package type and temperature grade. Confirm RoHS compliance status and check for any recent Product Change Notifications regarding packaging or assembly changes. Ensure the component meets the necessary environmental standards for the intended deployment environment.

Memory IC Selection Notes

Select this component when a 256-Kbit EEPROM with I2C compatibility is required within a 2.5V to 5.5V operating range. Consider the 8-lead SOIJ package for surface mount applications. Evaluate the need for hardware write protection and multi-device bus addressing capabilities during system design.

Memory IC Part Context

This part belongs to the 24XX256 family, which includes the 24AA256 and 24FC256 variants. While sharing similar architecture, the 24LC256 specifically requires a minimum supply voltage of 2.5V, unlike the 1.7V capable 24AA256 and 24FC256. All variants support the same I2C protocol and physical package options.

Memory IC Replacement Considerations

The 24AA256-I/SM and 24FC256-I/SM are electrically compatible alternatives within the same package. Note that these substitutes support a lower minimum voltage of 1.7V compared to the 2.5V requirement of the 24LC256 series.