24CS256T-I/Q4B

Memory IC Overview

The Microchip Technology 24CS256T-I/Q4B 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 utilizes an 8-lead UDFN package. The device includes a Security Register containing a factory-programmed 128-bit serial number and a user-programmable ID page. Built-in Error Correction Code (ECC) logic enhances data reliability, while versatile write protection options ensure data integrity.

Memory IC Feature Summary

• Supports High-Speed I2C communication at frequencies up to 3.4 MHz for efficient data transfer.
• Integrates a dedicated Security Register with a unique 128-bit serial number and lockable identification storage.
• Includes built-in Error Correction Code (ECC) logic to automatically correct single-bit read errors.
• Offers configurable hardware and enhanced software write protection mechanisms for data security.

Memory IC Applications

• Consumer electronics requiring reliable nonvolatile memory storage
• Industrial systems needing dependable data retention
• Automotive applications qualified under AEC-Q100 standards

Memory IC Procurement Notes

Verify the specific suffix 'I/Q4B' against official datasheets to confirm Industrial temperature range (-40°C to +85°C) and UDFN-8 packaging. Ensure compatibility with system voltage levels between 1.7V and 5.5V. Confirm that the required I2C clock speed does not exceed 3.4 MHz in High-Speed mode. Check for any recent Product Change Notifications regarding pinout or electrical characteristics updates.

Memory IC Selection Notes

Select this component when high-speed I2C communication is required alongside robust data protection features. The integrated ECC logic makes it suitable for environments where data integrity is critical. Consider the 128-bit serial number feature if product serialization is necessary without external programming steps. Ensure the application fits within the industrial temperature range and voltage specifications provided.

Memory IC Part Context

This part belongs to the 24CS256 family of serial EEPROMs from Microchip Technology. It is backward compatible with other standard serial EEPROMs like the 24AA256 and 24LC256. The device is designed to replace legacy memory solutions in space-constrained designs by offering advanced features such as ECC and high-speed interfaces in a compact UDFN package.

Memory IC Replacement Considerations

The datasheet explicitly states backward compatibility with 24AA256, 24LC256, 24FC256, and AT24C256C serial EEPROMs. Verify pinout and command set compatibility before substitution. Note that the 24CS256 offers additional features like ECC and High-Speed mode which may require firmware adjustments if replacing older variants.