24CS256-E/SN66KVAO

Memory IC Overview

The Microchip Technology 24CS256-E/SN66KVAO is a 256-Kbit (32,768 x 8-bit) 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 up to +125°C. The device includes a 1-Kbit Security Register containing a factory-programmed 128-bit serial number and user-programmable ID pages. Built-in Error Correction Code (ECC) logic enhances data reliability.

Memory IC Feature Summary

• Integrated 128-bit globally unique serial number for manufacturing serialization
• Built-in ECC logic capable of correcting single-bit read errors
• Configurable write protection supporting both hardware and enhanced software modes
• Backward compatibility with legacy I²C EEPROM architectures

Memory IC Applications

• Automotive systems requiring AEC-Q100 qualified nonvolatile memory
• Industrial equipment needing high-reliability data logging
• Consumer electronics requiring product identification and configuration storage

Memory IC Procurement Notes

Verify the specific suffix '66KVAO' against official Microchip documentation to confirm package type, tape-and-reel specifications, and automotive qualification status. Ensure the ordering code matches the required lead-free and RoHS compliance standards for your region. Cross-reference the datasheet revision date to confirm pinout and electrical characteristics align with your design requirements.

Memory IC Selection Notes

Select this component when designing systems that require robust data integrity through built-in error correction. The extended temperature rating makes it suitable for harsh environments. Consider the enhanced software write protection features if flexible zone-based security is needed alongside standard hardware write-protect capabilities.

Memory IC Part Context

This part belongs to the 24CS series of serial EEPROMs from Microchip Technology. It is designed as a drop-in replacement for various legacy 256-Kbit EEPROMs while offering advanced features like serial numbering and ECC. The SOIC-8 package provides a standard surface-mount footprint for PCB integration.

Memory IC Replacement Considerations

The datasheet confirms backward compatibility with 24AA256, 24LC256, 24FC256, and AT24C256C devices. Verify pinout compatibility and voltage level tolerances before substituting these parts in existing designs.