24CS256T-I/SN

Memory IC Overview

The Microchip Technology 24CS256T-I/SN 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 supports industrial temperatures from -40°C to +85°C. The device features a 1-Kbit Security Register containing 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 locking of eight 32-Kbit zones.

Memory IC Feature Summary

• Integrated 128-bit globally unique serial number for manufacturing serialization
• Built-in Error Correction Code (ECC) logic for data reliability
• Enhanced software write protection enabling individual zone locking
• High-speed I²C communication supporting 3.4 MHz operation

Memory IC Applications

• Automotive systems requiring AEC-Q100 qualified nonvolatile memory
• Industrial equipment needing reliable data retention and security
• Consumer electronics requiring product serialization and identification

Memory IC Procurement Notes

Verify the specific suffix 'SN' corresponds to the 8-Lead SOIC package configuration required for your PCB layout. Confirm that the 'I' designation meets your operational temperature requirements of -40°C to +85°C. Ensure your system design accommodates the necessary pull-up resistors for the I²C bus lines to support the specified clock frequencies.

Memory IC Selection Notes

Select this component when high-speed data transfer rates are critical alongside robust data integrity features. The inclusion of hardware-level security registers and ECC makes it suitable for applications where data corruption or unauthorized modification must be prevented. It serves as a direct replacement for legacy devices lacking these advanced protection mechanisms.

Memory IC Part Context

This part belongs to the 24CS256 family of serial EEPROMs designed for high-reliability storage. It is backward compatible with standard I²C EEPROMs but adds significant security and error-correction capabilities. The T suffix indicates tape-and-reel packaging, optimizing it for automated surface-mount assembly processes in high-volume production environments.

Memory IC Replacement Considerations

The datasheet confirms backward compatibility with 24AA256, 24LC256, 24FC256, and AT24C256C serial EEPROMs. When substituting these older parts, verify that the host controller can handle the High-Speed I²C mode if utilized, and ensure the new ECC and security register configurations do not conflict with existing firmware logic.