24AA02-I/ST

Memory IC Overview

The Microchip Technology 24AA02-I/ST is a 2-Kbit (256 x 8) serial EEPROM utilizing an I²C-compatible two-wire interface. It operates on a single supply voltage ranging from 1.7V to 5.5V with a maximum clock frequency of 400 kHz. The device features an 8-byte page write buffer, hardware write protection via the WP pin, and Schmitt trigger inputs for noise suppression. It supports industrial temperature operation from -40°C to +85°C and is housed in an 8-lead TSSOP package.

Memory IC Feature Summary

• Low-power CMOS technology enabling operation down to 1.7V with minimal standby current
• Hardware write-protection capability allowing entire memory array locking when WP pin is tied high
• Integrated 8-byte page write buffer for efficient data transfer operations
• Schmitt trigger inputs and output slope control to suppress noise and eliminate ground bounce

Memory IC Applications

• Data acquisition systems requiring non-volatile storage
• Personal communication devices needing low-power configuration memory
• Industrial control applications operating within standard temperature ranges
• Embedded systems utilizing I²C bus architecture for parameter storage

Memory IC Procurement Notes

Verify that the ordering suffix 'I' corresponds to the Industrial temperature range (-40°C to +85°C) and '/ST' indicates the 8-lead TSSOP package. Confirm the specific voltage requirements align with the 1.7V to 5.5V operational range defined for the 24AA02 series. Ensure compatibility with the host controller's I²C bus timing specifications before integration.

Memory IC Selection Notes

Select this component for applications requiring robust noise immunity through Schmitt triggers and precise hardware write protection. The 1.7V minimum supply voltage makes it suitable for battery-powered or low-voltage logic environments. Consider the 8-byte page buffer size when designing write algorithms to optimize bus throughput and minimize internal write cycle delays.

Memory IC Part Context

This part belongs to the 24XX02 family of 2-Kbit serial EEPROMs, which also includes the 24LC02B and 24FC02 variants. While sharing the same memory organization and interface protocol, the 24AA02 is distinguished by its ability to operate at lower voltages starting at 1.7V compared to the 2.5V minimum of the 24LC02B. It shares packaging options with the broader family but maintains unique electrical characteristics regarding voltage tolerance and clock frequency limits.

Memory IC Replacement Considerations

The 24LC02B serves as a functional substitute if the application voltage does not drop below 2.5V. The 24FC02 offers higher speed capabilities up to 1 MHz but requires verification of voltage compatibility. Direct replacement requires confirming that the target system supports the specific I²C addressing and timing constraints defined in the datasheet.