24AA02H-I/SN

Memory IC Overview

The Microchip Technology 24AA02H-I/SN is a 2 Kbit (256 x 8) serial EEPROM featuring 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 at VCC ≥ 2.5V. The device includes hardware write-protect functionality for the upper half of the memory array (addresses 80h–FFh) via the WP pin. It supports page writes of up to 8 bytes and offers data retention exceeding 200 years with over one million erase/write cycles.

Memory IC Feature Summary

• Hardware write-protect capability for the upper half of the memory array
• Schmitt trigger inputs and output slope control for noise suppression
• Self-timed erase/write cycle with acknowledge polling support
• Low-power CMOS technology with standby current as low as 1 µA

Memory IC Applications

• Data logging in industrial environments
• Configuration storage for embedded systems
• Parameter storage in consumer electronics
• Device identification and calibration data retention

Memory IC Procurement Notes

Verify the specific suffix 'SN' corresponds to the 8-lead SOIC package when sourcing. Confirm the 'I' designation indicates the Industrial temperature range (-40°C to +85°C). Ensure the component is sourced from authorized distributors to guarantee authenticity, as counterfeit EEPROMs may exhibit incorrect electrical characteristics or reliability issues.

Memory IC Selection Notes

Select this part if a low-voltage operation down to 1.7V is required, distinguishing it from the 2.5V minimum 24LC02BH variant. The SN package is suitable for surface-mount applications requiring standard SOIC footprint compatibility. Consider the half-array write-protect feature if security for high-address data is necessary without software overhead.

Memory IC Part Context

This component belongs to the 24XX02H family of 2 Kbit serial EEPROMs. It shares functional similarities with the 24LC02BH but differs in its lower minimum operating voltage of 1.7V compared to 2.5V. The family utilizes a standardized I²C protocol, allowing interoperability with other devices in the same bus architecture while offering distinct voltage and package options.

Memory IC Replacement Considerations

The 24LC02BH is a compatible alternative but requires a minimum VCC of 2.5V. Other 24AA02 variants with different packages (e.g., ST, MSOP) are pin-compatible if the form factor changes are acceptable. Verify that any substitute maintains the 400 kHz clock speed requirement at the target operating voltage.