24CS256-E/SM

Memory IC Overview

The Microchip Technology 24CS256-E/SM is a 256-Kbit (32,768 x 8-bit) Serial Electrically Erasable PROM featuring an I²C interface with High-Speed mode support up to 3.4 MHz. It operates across a voltage range of 1.7V to 5.5V and supports industrial (-40°C to +85°C) and extended (-40°C to +125°C) temperature ranges. The device includes a 1-Kbit Security register containing a factory-programmed 128-bit serial number and user-programmable ID page. Built-in Error Correction Code (ECC) logic enhances reliability by correcting single-bit errors within four-byte readouts.

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 user ID page
• Built-in Error Correction Code (ECC) for improved data integrity during reads
• Versatile write protection options including hardware WP pin and enhanced software zone protection

Memory IC Applications

• Consumer electronics requiring reliable nonvolatile memory storage
• Industrial systems needing dependable data retention in harsh environments
• Automotive applications qualified under AEC-Q100 standards
• Devices requiring unique product serialization without manual programming

Memory IC Procurement Notes

Verify the specific suffix 'E' confirms the Extended temperature range (-40°C to +125°C) and 'SM' denotes the 8-Lead SOIJ package. Confirm RoHS compliance status through official documentation. Ensure the ordering code matches the required voltage and speed specifications for your system design.

Memory IC Selection Notes

Select this component when high-speed data transfer rates up to 3.4 MHz are required alongside robust security features. The built-in ECC and extensive write endurance make it suitable for critical data logging. Consider the SOIJ package for space-constrained surface-mount designs requiring automotive-grade thermal performance.

Memory IC Part Context

This part belongs to the 24CS256 family of Serial EEPROMs designed for backward compatibility with legacy devices like the 24AA256 and 24LC256. It offers enhanced features such as higher clock speeds and integrated security registers compared to older generations, while maintaining standard I²C addressing protocols.

Memory IC Replacement Considerations

The datasheet explicitly states backward compatibility with 24AA256, 24LC256, 24FC256, and AT24C256C serial EEPROMs. Verify pinout and voltage compatibility before substitution.