24AA02HT-I/ST

Memory IC Overview

The Microchip Technology 24AA02HT-I/ST is a 2 Kbit (256 x 8) Electrically Erasable PROM (EEPROM) featuring a two-wire serial interface compatible with I2C protocols. It operates on a single supply voltage ranging from 1.7V to 5.5V, supporting clock frequencies up to 400 kHz at voltages of 2.5V or higher, and 100 kHz below 2.5V. The device includes an 8-byte page write buffer and hardware write-protect functionality for the upper half of the memory array (addresses 80h-FFh). It provides Schmitt trigger inputs for noise suppression and output slope control to eliminate ground bounce.

Memory IC Feature Summary

• Hardware write-protect capability for the upper half of the memory array via the WP pin
• Schmitt trigger inputs and filter circuits for enhanced noise spike suppression
• Output slope control designed to minimize ground bounce during operation
• Self-timed erase/write cycles with acknowledge polling support

Memory IC Applications

• Low-voltage embedded systems requiring non-volatile data storage
• Industrial applications operating within -40°C to +85°C temperature ranges
• Systems utilizing I2C bus architectures for component communication
• Devices requiring protection against accidental writes to specific memory regions

Memory IC Procurement Notes

Verify the exact ordering suffix matches the required package type, as the 'ST' designation specifically indicates the 8-Lead TSSOP package. Confirm that the industrial temperature grade (-40°C to +85°C) aligns with your system's environmental requirements. Ensure the voltage supply in your design supports the minimum 1.7V threshold for full feature compatibility. Check for any specific RoHS compliance documentation if required by your manufacturing standards.

Memory IC Selection Notes

Select this component when a 2 Kbit EEPROM with hardware write-protect features is needed. It is suitable for designs requiring low standby current and operation down to 1.7V. Consider the TSSOP package constraints for PCB layout. Compare against standard 24AA02 models if half-array write protection is not required, as those may offer different packaging options or pricing structures depending on availability.

Memory IC Part Context

This part belongs to the 24AA02H series, which distinguishes itself from the standard 24AA02 by including hardware write-protect capabilities for half the array. It shares the same basic memory organization and I2C interface but adds specific noise immunity features like Schmitt triggers. The 'I' suffix denotes the industrial temperature range, while 'ST' specifies the thin-shrink small-outline package.

Memory IC Replacement Considerations

The 24LC02BH is a functional equivalent within the same datasheet, though it requires a minimum supply voltage of 2.5V instead of 1.7V. Standard 24AA02 devices lack the hardware write-protect feature found in the H-series. Verify package dimensions and pinout compatibility before substituting, as physical footprint differences may exist between TSSOP and other available packages.