24CS128T-I/ST

Memory IC Overview

The Microchip Technology 24CS128-I/ST is a 128-Kbit (16,384 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 includes a Security Register containing a preprogrammed 128-bit serial number and user-programmable ID page. The device incorporates built-in Error Correction Code (ECC) logic for data reliability and supports AEC-Q100 automotive qualification.

Memory IC Feature Summary

• Integrated Security Register with factory-programmed unique serial number and lockable user identification area
• Built-in Error Correction Code (ECC) logic to correct single-bit read errors within four-byte blocks
• Configurable write protection supporting both legacy hardware pin control and enhanced software zone locking
• High-speed I²C communication capability reaching 3.4 MHz with output slope control to minimize ground bounce

Memory IC Applications

• Automotive systems requiring AEC-Q100 qualified nonvolatile storage
• Industrial applications needing reliable data retention and high-speed configuration logging
• Consumer electronics utilizing serialized component tracking via embedded serial numbers

Memory IC Procurement Notes

Verify the 'I' suffix confirms the Industrial temperature grade (-40°C to +85°C). Confirm the '/ST' designation corresponds to the 8-lead SOIC package. Ensure the specific revision matches the required ECC and security register functionality. Cross-reference the datasheet DS20006913B for accurate electrical limits.

Memory IC Selection Notes

Select this component when a globally unique identifier is required without external serialization steps. Choose the High-Speed I²C mode if bus throughput exceeds standard 400 kHz requirements. Consider the enhanced software write protection if flexible per-zone locking is needed beyond simple hardware pins.

Memory IC Part Context

This part belongs to the 24CS series of serial EEPROMs designed for high-reliability environments. It is backward compatible with other industry-standard 128-Kbit EEPROMs but adds distinct features like the integrated serial number and ECC. The series targets applications demanding robust data integrity and secure identification.

Memory IC Replacement Considerations

The datasheet lists backward compatibility with 24AA128, 24LC128, 24FC128, and AT24C128C. Verify that these substitutes lack the specific Security Register and ECC features if those are critical to the design.