24LC256-E/MS

Memory IC Overview

The Microchip Technology 24LC256-E/MS is a 32K x 8 (256-Kbit) Serial Electrically Erasable PROM (EEPROM). It operates within a voltage range of 2.5V to 5.5V and supports a maximum clock frequency of 400 kHz. The device features an I2C compatible two-wire serial interface, Schmitt trigger inputs for noise suppression, and hardware write protection via the WP pin. It includes a 64-byte page write buffer and supports random and sequential reads up to the 256K boundary. The component is available in an 8-lead MSOP package and is rated for extended temperature operation from -40°C to +125°C.

Memory IC Feature Summary

• Supports bidirectional two-wire serial communication protocol with I2C compatibility
• Includes hardware write protection controlled by the WP pin to inhibit array writes
• Features a 64-byte page write buffer for efficient data storage operations
• Provides Schmitt trigger inputs on SDA and SCL pins for improved noise spike suppression

Memory IC Applications

• Personal communications devices requiring non-volatile data storage
• Data acquisition systems needing reliable parameter retention
• Embedded systems utilizing I2C bus architecture for configuration memory
• Industrial control applications operating within extended temperature ranges

Memory IC Procurement Notes

Verify that the ordering suffix corresponds to the MSOP package type and Extended temperature grade. Confirm the voltage range specification matches the application requirements, as this variant operates from 2.5V to 5.5V. Ensure compatibility with the system's I2C bus timing constraints and pull-up resistor values. Check for RoHS compliance status if required by regulatory standards.

Memory IC Selection Notes

Select this component when a 256-Kbit EEPROM with I2C interface is required for low-power applications. Choose the Extended temperature grade (-40°C to +125°C) for environments exceeding standard industrial limits. Consider the MSOP package for space-constrained surface-mount designs. Verify that the 2.5V minimum supply voltage aligns with the system power rails, noting that lower voltage variants exist in the same family.

Memory IC Part Context

This part belongs to the 24XX256 family of 256-Kbit Serial EEPROMs manufactured by Microchip Technology. The family includes variants such as the 24AA256 and 24FC256, which differ primarily in operating voltage ranges and maximum clock frequencies. The 24LC256 specifically targets applications requiring operation down to 2.5V, distinguishing it from the 1.7V capable 24AA256 and the high-speed 24FC256.

Memory IC Replacement Considerations

Direct substitutes within the same package and electrical specifications include other 24LC256 variants with different temperature grades or packaging options, such as 24LC256-I/MS for Industrial temperature range. Cross-family replacements like 24AA256-E/MS offer similar functionality but support a lower minimum voltage of 1.7V.