24CS256-I/P

Memory IC Overview

The Microchip Technology 24CS256-I/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 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-programmable ID pages. Built-in ECC logic corrects single-bit read errors, while enhanced software write protection allows locking individual memory zones.

Memory IC Feature Summary

• Integrated 128-bit factory-programmed serial number for unique device identification
• Built-in Error Correction Code (ECC) logic for improved data reliability
• Enhanced software write protection enabling independent zone locking
• High-speed I²C communication supporting 3.4 MHz operation

Memory IC Applications

• Automotive systems requiring AEC-Q100 qualified nonvolatile storage
• Industrial equipment needing reliable data retention and security features
• Consumer electronics utilizing serialized component tracking
• Embedded systems requiring hardware-level data protection

Memory IC Procurement Notes

Verify the specific suffix 'I' confirms the Industrial temperature range (-40°C to +85°C). Confirm the '/P' designation indicates the 8-Lead PDIP package type. Ensure the application design accounts for the required pull-up resistors on SDA and SCL lines to support the specified clock frequencies. Cross-reference the datasheet revision to confirm compatibility with existing firmware protocols.

Memory IC Selection Notes

Select this component when high-speed data transfer rates are necessary alongside robust security features. The inclusion of ECC makes it suitable for environments prone to signal noise or bit errors. Consider the 128-bit serial number requirement for supply chain management. Verify that the host controller supports the specific I²C addressing sequences required for accessing the Configuration and Security registers.

Memory IC Part Context

This part belongs to the 24CS series of Serial EEPROMs, which are distinguished by their integrated security registers and ECC capabilities. Unlike standard variants, the CS series provides enhanced write protection mechanisms and unique serialization. It serves as a direct replacement for legacy devices like the 24LC256 but offers superior data integrity and identification features for modern embedded applications.

Memory IC Replacement Considerations

The datasheet explicitly states backward compatibility with the 24AA256, 24LC256, 24FC256, and AT24C256C serial EEPROMs. When substituting these parts, ensure the system can handle the higher clock speeds and verify that the new security register access commands do not interfere with existing legacy code.