24CS256-E/P

Memory IC Overview

The Microchip Technology 24CS256-E/P 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 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-lockable ID pages. Built-in ECC logic corrects single-bit errors per four-byte readout. It utilizes an 8-lead PDIP package.

Memory IC Feature Summary

• Integrated 128-bit globally unique serial number for manufacturing serialization
• Built-in Error Correction Code (ECC) logic for enhanced data reliability
• Versatile write protection via hardware WP pin or software-configurable zones
• Backward compatible with legacy 24AA256/24LC256/24FC256 devices

Memory IC Applications

• Automotive systems requiring AEC-Q100 qualified nonvolatile memory
• Industrial equipment needing reliable data storage across wide temperature ranges
• Consumer electronics utilizing high-speed I²C communication
• Applications requiring unique device identification and secure data locking

Memory IC Procurement Notes

Verify the 'E' suffix confirms the Extended temperature range (-40°C to +125°C). Confirm the '/P' suffix corresponds to the 8-lead PDIP package. Ensure the specific revision matches the required datasheet version DS20005998D. Check for RoHS compliance status as specified in the manufacturer documentation.

Memory IC Selection Notes

Select this component when high-speed I²C operation up to 3.4 MHz is required alongside robust data integrity features. The built-in ECC and extensive security registers make it suitable for applications demanding high reliability and unique device tracking. Ensure the system voltage falls within the 1.7V to 5.5V operating range.

Memory IC Part Context

The 24CS256 belongs to Microchip's CS series of Serial EEPROMs, designed for advanced low-power applications. It expands upon the standard 24XX256 architecture by adding a dedicated Security register and Manufacturer ID support. This series targets markets requiring both high performance and enhanced security features in a compact form factor.

Memory IC Replacement Considerations

The datasheet explicitly states backward compatibility with the 24AA256, 24LC256, and 24FC256. Verify that the replacement part supports the same 8-lead PDIP package and meets the required temperature specifications.