24CS256T-E/OT

Memory IC Overview

The Microchip Technology 24CS256T-E/OT is a 256-Kbit (32K x 8) 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 built-in 128-bit factory-programmed serial number, user-lockable security registers, and Error Correction Code (ECC) logic for data integrity. It utilizes a 5-lead SOT-23 package.

Memory IC Feature Summary

• High-speed I2C communication supporting 3.4 MHz operation
• Integrated 128-bit unique serial number and lockable security register
• Built-in Error Correction Code (ECC) logic for enhanced reliability
• Versatile write protection via hardware WP pin or software configuration

Memory IC Applications

• Automotive systems requiring AEC-Q100 qualification
• Industrial applications needing reliable nonvolatile storage at high temperatures
• Consumer electronics requiring product serialization and anti-counterfeiting measures

Memory IC Procurement Notes

Verify the specific suffix 'OT' corresponds to the SOT-23-5 package and Extended Temperature (-40°C to +125°C) grade as indicated by the 'E' in the part number. Confirm that the ordering information matches the manufacturer's current datasheet revision DS20005998D. Ensure compatibility with system voltage levels between 1.7V and 5.5V before procurement.

Memory IC Selection Notes

Select this component when high-speed data transfer rates up to 3.4 MHz are required alongside robust data protection features. The inclusion of ECC and a permanent serial number makes it suitable for applications demanding high reliability and traceability. Consider the SOT-23-5 package constraints for space-limited designs compared to larger SOIC or MSOP options.

Memory IC Part Context

This device belongs to the 24CS256 family of serial EEPROMs manufactured by Microchip Technology. It is backward compatible with legacy devices such as the 24AA256 and 24LC256 but offers enhanced features like High-Speed I2C mode and integrated security registers. The T-E/OT designation specifically identifies the tape-and-reel packaging, extended temperature rating, and SOT-23 form factor.

Memory IC Replacement Considerations

Direct substitutes include other 24CS256 variants with different packages such as 24CS256-E/SN (SOIC) or 24CS256-E/MS (MSOP). For automotive-grade requirements, verify if the specific application necessitates the AEC-Q100 qualification explicitly documented for this series.