24CS256T-E/MS

Memory IC Overview

The Microchip Technology 24CS256T-E/MS is a 256-Kbit (32,768 x 8-bit) serial EEPROM featuring an I²C interface with High-Speed mode support up to 3.4 MHz. It operates within a voltage range of 1.7V to 5.5V and supports extended temperature ranges from -40°C to +125°C. The device includes a Security Register with a factory-programmed 128-bit serial number and user-lockable ID pages. Built-in ECC logic corrects single-bit read errors, while enhanced software write protection allows independent zone locking.

Memory IC Feature Summary

• High-speed I²C communication supporting standard modes and 3.4 MHz High-Speed operation
• Integrated Security Register containing a unique 128-bit serial number and lockable identification storage
• Built-in Error Correction Code (ECC) logic for improved data reliability during reads
• Versatile write protection options including hardware WP pin control and configurable software zone protection

Memory IC Applications

• Automotive systems requiring AEC-Q100 qualified nonvolatile memory
• Industrial applications needing reliable data logging and configuration storage
• Consumer electronics utilizing product serialization and anti-counterfeiting measures
• Embedded controllers storing calibration data and system parameters

Memory IC Procurement Notes

Verify the specific suffix 'T-E/MS' corresponds to the tape-and-reel packaging format and Extended temperature grade (-40°C to +125°C). Confirm that the ordering code matches the required package type, which is 8-Lead MSOP. Ensure compatibility with the host system's I²C voltage levels and pull-up requirements for the selected clock frequency.

Memory IC Selection Notes

Select this component when high-speed data transfer rates up to 3.4 MHz are necessary alongside robust security features. The inclusion of a preprogrammed serial number simplifies manufacturing line serialization processes. Choose this part over legacy EEPROMs if enhanced software write protection or built-in error correction is required for critical data integrity in automotive or industrial environments.

Memory IC Part Context

This device belongs to the 24CS256 family of serial EEPROMs designed by Microchip Technology. It is backward compatible with other 256-Kbit I²C EEPROMs such as the 24AA256, 24LC256, and AT24C256C. The 'T' indicates tape-and-reel packaging, 'E' denotes the extended temperature range, and 'MS' specifies the 8-lead MSOP package.

Memory IC Replacement Considerations

The datasheet confirms backward compatibility with 24AA256, 24LC256, 24FC256, and AT24C256C devices. Verify that substitute parts support the required 3.4 MHz High-Speed mode and extended temperature range if these specifications are critical to the design.