24CS256T-E/SM

Memory IC Overview

The Microchip Technology 24CS256T-E/SM is a 256-Kbit (32K x 8) serial EEPROM utilizing 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 features a 1-Kbit Security Register containing a factory-programmed 128-bit serial number and a user-programmable ID page. The device includes built-in Error Correction Code (ECC) logic, enhanced software write protection for eight independent zones, and supports AEC-Q100 automotive qualification.

Memory IC Feature Summary

• Integrated 128-bit globally unique serial number and lockable user identification page within the Security Register
• Built-in Error Correction Code (ECC) logic capable of correcting single-bit errors during read operations
• Configurable Enhanced Software Write Protection allowing individual zone locking via the Configuration Register
• High-Speed I²C Interface supporting 3.4 MHz operation with output slope control to eliminate ground bounce

Memory IC Applications

• Automotive systems requiring AEC-Q100 qualified nonvolatile memory storage
• Industrial applications needing reliable data retention and extended temperature operation
• Consumer electronics requiring hardware-level serialization without manual programming steps
• Systems utilizing I²C Manufacturer Identification for component verification

Memory IC Procurement Notes

Verify that the ordering suffix corresponds to the MSOP-8 package type. Confirm the 'E' designation indicates Extended Temperature range (-40°C to +125°C). Ensure the specific revision matches the required ECC and security register configurations. Cross-reference the datasheet version to confirm compatibility with legacy devices like the 24LC256 or AT24C256C if pin-for-pin replacement is intended.

Memory IC Selection Notes

Select this component when high-speed data transfer rates up to 3.4 MHz are required alongside robust data integrity features. The inclusion of ECC makes it suitable for environments prone to electrical noise. Choose this part over standard EEPROMs if permanent hardware serialization and granular software-based write protection are necessary system requirements.

Memory IC Part Context

This device belongs to the 24CS256 family of serial EEPROMs designed for high-reliability applications. It is backward compatible with other industry-standard 256-Kbit serial EEPROMs but adds advanced security and error correction capabilities. The T-E/SM suffix specifically denotes the tape-and-reel packaging format in the MSOP-8 package optimized for surface-mount assembly.

Memory IC Replacement Considerations

The device is documented as backward compatible with the 24AA256, 24LC256, 24FC256, and AT24C256C serial EEPROMs. Verify that the host controller supports the 3.4 MHz High-Speed mode if maximum performance is desired, as these legacy parts typically operate at lower frequencies.