24AA02T/ST

Memory IC Overview

The Microchip Technology 24AA02T/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 and supports clock frequencies up to 400 kHz at voltages of 2.5V or higher, and 100 kHz below 2.5V. The device utilizes low-power CMOS technology, drawing a maximum read current of 1 mA and standby current of 1 µA in industrial temperature ranges (-40°C to +85°C). It includes an 8-byte page write buffer, hardware write protection via the WP pin, and Schmitt trigger inputs for noise suppression.

Memory IC Feature Summary

• Supports bidirectional data transmission using a standard two-wire serial bus protocol.
• Features hardware write protection that inhibits all memory writes when the WP pin is tied high.
• Includes an internal address pointer to facilitate sequential reading operations across the memory array.
• Provides output slope control mechanisms designed to eliminate ground bounce during switching.

Memory IC Applications

• Data logging applications requiring non-volatile storage of sensor readings.
• Configuration storage for microcontroller systems needing parameter retention.
• Identification and calibration data storage in consumer electronics devices.

Memory IC Procurement Notes

Verify the specific ordering suffix 'T' corresponds to the required tape and reel packaging format rather than tube packaging. Confirm that the industrial temperature grade meets the operational environmental requirements of the target application. Ensure the voltage supply range aligns with the system's power rails, noting the frequency limitations at lower voltages.

Memory IC Selection Notes

Select this component for designs requiring low-voltage operation down to 1.7V where power consumption is critical. Consider the 8-byte page write buffer for efficient data handling compared to byte-write-only alternatives. Verify compatibility with the host controller's I²C speed capabilities, particularly if operating below 2.5V where the maximum clock frequency reduces to 100 kHz.

Memory IC Part Context

This part belongs to the 24XX02 family of serial EEPROMs manufactured by Microchip Technology. It shares functional similarities with the 24LC02B and 24FC02 variants, differing primarily in minimum operating voltage and maximum clock frequency specifications. The 'T' suffix indicates a specific packaging configuration distinct from the standard tube versions.

Memory IC Replacement Considerations

The 24AA02-I/ST serves as a direct equivalent in tube packaging. For extended temperature ranges, the 24AA02E variant is available. Cross-reference with 24LC02B for 2.5V minimum operation or 24FC02 for 1 MHz speed requirements, ensuring package and voltage constraints are met.