24LC256-I/SN

Memory IC Overview

The Microchip Technology 24LC256-I/SN 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 an I²C compatible two-wire serial interface. The device features a 64-byte page write buffer, hardware write protection, and Schmitt trigger inputs for noise suppression. It provides over 1 million erase/write cycles and data retention exceeding 200 years. The component is housed in an 8-lead SOIC package and functions within an industrial temperature range of -40°C to +85°C.

Memory IC Feature Summary

• Supports cascading up to eight devices on the same bus using functional address lines A0, A1, and A2.
• Includes a hardware write-protect pin that inhibits write operations when tied to VCC while maintaining read access.
• Features output slope control to eliminate ground bounce and Schmitt trigger inputs for improved noise spike suppression.

Memory IC Applications

• Personal communications systems requiring low-power non-volatile storage
• Data acquisition applications needing reliable parameter retention
• Industrial control systems operating within standard temperature ranges

Memory IC Procurement Notes

Verify the specific ordering suffix against official documentation to confirm package type and temperature grade. Confirm RoHS compliance status as required by project specifications. Check for any Product Change Notifications (PCNs) related to assembly sites or material updates before finalizing procurement decisions.

Memory IC Selection Notes

Select this component for designs requiring I²C connectivity with moderate speed requirements up to 400 kHz. Ensure the system voltage remains within the 2.5V to 5.5V operational range. Consider the 64-byte page write capability for efficient data handling and utilize the hardware write-protect feature for critical data integrity.

Memory IC Part Context

This part belongs to the 24XX256 family of 256-Kbit Serial EEPROMs manufactured by Microchip Technology. It shares architectural similarities with the 24AA256 and 24FC256 but differs in minimum operating voltage and maximum clock frequency specifications. The 'I' designation indicates the industrial temperature range variant.

Memory IC Replacement Considerations

24LC256-I/MS

Memory IC FAQ

How does the hardware write-protect function operate?

Tying the WP pin to VCC inhibits all write operations to the array, while tying it to VSS enables them. Read operations remain unaffected regardless of the WP pin state.

What is the maximum number of devices supported on a single bus?

Up to eight devices can be connected to the same bus by configuring the chip select bits A0, A1, and A2 to unique combinations.