24CS256-I/MS

Memory IC Overview

The Microchip Technology 24CS256-I/MS is a 256-Kbit (32,768 x 8-bit) CMOS Serial EEPROM utilizing an I²C interface with High-Speed mode support up to 3.4 MHz. It operates across a voltage range of 1.7V to 5.5V and supports Industrial temperature ranges (-40°C to +85°C). The device features a dedicated 1-Kbit Security Register containing a factory-programmed 128-bit serial number and a user-programmable ID page. Built-in Error Correction Code (ECC) logic enhances reliability by correcting single-bit errors within four-byte readouts.

Memory IC Feature Summary

• Integrated 128-bit globally unique serial number for manufacturing serialization
• Built-in Error Correction Code (ECC) logic for data integrity
• Enhanced software write protection allowing independent zone locking
• Backward compatible with legacy I²C serial EEPROM architectures

Memory IC Applications

• Automotive systems requiring AEC-Q100 qualified nonvolatile storage
• Industrial applications needing reliable data retention and ECC
• Consumer electronics requiring hardware-level product identification

Memory IC Procurement Notes

Verify the 'I' suffix confirms the Industrial temperature grade (-40°C to +85°C) and the 'MS' suffix corresponds to the 8-lead MSOP package. Confirm that the specific revision matches the DS20005998 datasheet. Ensure the application environment stays within the specified 1.7V to 5.5V operating voltage range to maintain ECC functionality and timing specifications.

Memory IC Selection Notes

Select this component when high-speed data transfer up to 3.4 MHz is required alongside robust security features. The inclusion of a permanent 128-bit serial number eliminates manual programming steps during assembly. Choose this part over standard EEPROMs if system reliability demands built-in error correction for critical data storage in automotive or industrial environments.

Memory IC Part Context

The 24CS256 belongs to Microchip's CS series of I²C Serial EEPROMs, designed for enhanced security and reliability. It serves as a successor to the 24AA/LC/FC256 families, adding significant value through integrated ECC and unique hardware identification. This series targets applications where data integrity and traceability are paramount, offering backward compatibility while introducing advanced software-based protection mechanisms.

Memory IC Replacement Considerations

The datasheet explicitly states backward compatibility with the 24AA256, 24LC256, 24FC256, and AT24C256C. These parts can be substituted if the application does not require the specific ECC, serial number, or enhanced software protection features provided by the 24CS256.