24AA02/ST

Memory IC Overview

The Microchip Technology 24AA02-I/ST is a 2-Kbit (256 x 8) Electrically Erasable PROM (EEPROM) housed in an 8-lead TSSOP package. It operates on a single supply voltage ranging from 1.7V to 5.5V and supports I2C-compatible two-wire serial communication with a maximum clock frequency of 400 kHz at voltages above 2.5V, or 100 kHz below that threshold. The device features an 8-byte page write buffer, hardware write protection via the WP pin, and Schmitt trigger inputs for noise suppression. It guarantees over one million erase/write cycles and data retention exceeding 200 years within the industrial temperature range of -40°C to +85°C.

Memory IC Feature Summary

• Low-power CMOS technology enabling operation down to 1.7V with minimal standby and active currents.
• I2C compatible two-wire serial interface with Schmitt trigger inputs for enhanced noise suppression.
• Hardware write-protect capability allowing entire memory array locking when the WP pin is tied high.
• Self-timed erase/write cycle with automatic termination and internal address pointer management.

Memory IC Applications

• Industrial control systems requiring non-volatile data storage
• Consumer electronics utilizing low-voltage power supplies
• Automotive applications meeting AEC-Q100 qualification standards

Memory IC Procurement Notes

Verify the specific ordering suffix against official Microchip documentation to confirm package type, temperature grade, and tape/reel specifications. Ensure compatibility with system voltage requirements, as the 24AA02 series supports operation down to 1.7V, distinct from other variants in the family. Confirm RoHS compliance status if required by regulatory standards. Cross-reference datasheet revision dates to ensure accurate timing parameters are applied during design validation.

Memory IC Selection Notes

Select this component for designs requiring small form factor surface-mount integration with I2C connectivity. The 24AA02 variant specifically supports lower voltage operations starting at 1.7V, making it suitable for battery-powered or low-voltage logic environments compared to the 2.5V minimum of the 24LC02B series. Consider the 8-byte page write buffer size for write efficiency and verify that the 400 kHz clock speed meets bus timing constraints.

Memory IC Part Context

This part belongs to the 24XX02 family of 2-Kbit serial EEPROMs manufactured by Microchip Technology. The family includes the 24AA02, 24LC02B, and 24FC02 devices, which share similar architectural features but differ in operating voltage ranges and maximum clock frequencies. The 24AA02 is distinguished by its ability to operate at voltages as low as 1.7V, whereas the 24LC02B requires a minimum of 2.5V.

Memory IC Replacement Considerations

Direct functional substitutes within the same package include the 24AA02T-I/ST (tape and reel packaging) or the 24AA02-E/ST (extended temperature grade). For voltage-specific replacements, the 24LC02B-I/ST serves as a compatible alternative if the system voltage remains above 2.5V.