24CS256-I/SM

Memory IC Overview

The Microchip Technology 24CS256-I/SM 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 industrial temperatures from -40°C to +85°C. The device includes 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

• High-speed I²C communication supporting standard modes and 3.4 MHz High-Speed operation
• Integrated 1-Kbit Security Register with unique 128-bit serial number and lockable identification page
• Built-in Error Correction Code (ECC) logic for improved data reliability during reads
• Versatile write protection options including hardware WP pin control and enhanced software zone locking

Memory IC Applications

• Consumer electronics requiring reliable nonvolatile memory storage
• Industrial systems needing dependable data retention and high-speed access
• Automotive applications utilizing AEC-Q100 qualified components
• Manufacturing lines requiring automatic product serialization via unique serial numbers

Memory IC Procurement Notes

Verify the specific suffix 'I/SM' corresponds to the Industrial temperature range (-40°C to +85°C) and the 8-Lead SOIJ package type. Confirm that the required operating voltage aligns with the specified 1.7V to 5.5V range. Ensure design compatibility with the I²C protocol timing requirements for both standard and High-Speed modes before finalizing procurement.

Memory IC Selection Notes

Select this component when application demands exceed the speed capabilities of standard 400 kHz EEPROMs, specifically requiring 3.4 MHz throughput. Choose this part over legacy compatible devices if built-in ECC and programmable security registers are necessary for data integrity and anti-counterfeiting measures. Verify that the system can accommodate the specific 8-lead SOIJ footprint and power supply characteristics.

Memory IC Part Context

This device belongs to the 24CS series of Serial EEPROMs designed by Microchip Technology. It serves as a backward-compatible replacement for older architectures like the 24AA256 and AT24C256C while introducing advanced features such as High-Speed I²C support and integrated security registers. The series targets applications requiring robust, nonvolatile storage with enhanced reliability features.

Memory IC Replacement Considerations

The datasheet explicitly lists backward compatibility with the 24AA256, 24LC256, 24FC256, and AT24C256C serial EEPROMs. Designers replacing these legacy parts should verify that the host controller supports the 3.4 MHz High-Speed mode if utilized, and ensure that the physical package dimensions of the SOIJ variant fit the existing PCB layout.