24CSM01T-I/SM

Memory IC Overview

The Microchip Technology 24CSM01T-I/SM is a 1-Mbit (131,072 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 supports industrial temperatures from -40°C to +85°C. The device includes built-in ECC logic for data integrity, a preprogrammed 128-bit serial number, and versatile write protection options including hardware WP pin control and enhanced software protection.

Memory IC Feature Summary

• Built-in Error Correction Code (ECC) logic capable of correcting single-bit errors within four-byte readouts.
• Integrated Security Register containing a factory-programmed 128-bit unique serial number and user-programmable lockable ID page.
• Enhanced software write protection allowing configuration of independent memory zones via the Configuration register.
• High-speed I²C communication supporting Standard, Fast, Fast Mode Plus, and High-Speed modes with Schmitt Trigger inputs.

Memory IC Applications

• Industrial control systems requiring reliable nonvolatile storage
• Automotive applications meeting AEC-Q100 qualification standards
• Medical devices needing high reliability and data retention
• Smart metering infrastructure for secure parameter storage

Memory IC Procurement Notes

Verify that the ordering suffix 'I' corresponds to the Industrial temperature range (-40°C to +85°C) and 'SM' denotes the 8-lead SOIJ package. Confirm that the 'T' suffix indicates tape and reel packaging suitable for automated assembly processes. Ensure compatibility with the host system's I²C bus voltage levels and pull-up resistor requirements for the selected clock frequency.

Memory IC Selection Notes

Select this component when high-speed data transfer rates up to 3.4 MHz are required alongside robust data integrity features. The inclusion of ECC logic makes it suitable for environments prone to electrical noise or where data corruption must be minimized. Consider the enhanced software write protection if flexible, zone-based security is needed without additional hardware components.

Memory IC Part Context

This part belongs to the 24CSM01 family of 1-Mbit Serial EEPROMs manufactured by Microchip Technology. It shares core architectural features with other variants in the series, such as the 24CSM01-E/MS, differing primarily in operating temperature ranges and physical package types. The device is designed to replace legacy EEPROMs in applications demanding higher speed and improved security features.

Memory IC Replacement Considerations

Direct replacements include other 24CSM01 variants with different packages or temperature ratings, such as 24CSM01-E/MS for extended temperature operation. Cross-referencing with older Microchip EEPROM models may require verification of pinout compatibility and I²C address configurations.

Memory IC FAQ

How does the ECC logic function within the 24CSM01?

The built-in ECC scheme can correct up to one incorrectly read bit within a four-byte readout. An Error Correction State latch in the Configuration register indicates when ECC has been invoked.

What is the purpose of the Security Register?

The Security Register contains a read-only 128-bit serial number for unique device identification and a 256-byte user-programmable section that can be permanently locked to protect critical application data.

Can the Write-Protect pin be used with Enhanced Software Write Protection?

No. When using Enhanced Software Write Protection mode configured via the Configuration register, the WP pin is ignored and should be tied to either VCC or VSS.