34AA02-I/SN

Overview

The Microchip Technology 34AA02-I/SN is a 2 Kbit (256 x 8) serial EEPROM featuring an I²C-compatible 2-wire interface. It operates on a single supply voltage ranging from 1.7V to 5.5V and supports clock frequencies up to 400 kHz. The device includes permanent and resettable software write-protect capabilities for the lower half of the array, alongside hardware protection via the WP pin. It offers a page write buffer of 16 bytes, typical access times of 900 ns, and endurance exceeding one million erase/write cycles with data retention over 200 years.

Feature Summary

• Features dual software write-protect modes allowing selective or permanent locking of the lower memory half
• Includes hardware write-protection capability through the dedicated WP pin to secure the entire array
• Supports cascading up to eight devices on a single bus using configurable chip select pins

Applications

• Embedded systems requiring non-volatile configuration storage
• Industrial control applications needing reliable parameter retention
• Consumer electronics utilizing low-voltage power supplies

Procurement Notes

Verify that the ordering suffix matches the required package type, as the 34AA02 series is available in multiple configurations including SOIC, TSSOP, MSOP, TDFN, and SOT-23. Confirm the temperature grade corresponds to the application environment, specifically ensuring the Industrial grade (-40°C to +85°C) meets operational requirements. Cross-reference datasheet revision numbers to ensure compatibility with existing design specifications.

Selection Notes

Select this component when a small capacity non-volatile memory solution is needed with flexible write-protection options. The wide voltage range allows operation in both standard 5V and low-power 1.8V environments. Consider the specific package availability if space constraints exist, noting that the SOIC variant provides a standard footprint for surface mount assembly.

Part Context

This part belongs to the 34XX02 family of serial EEPROMs manufactured by Microchip Technology. It shares functional similarities with the 34LC02 but differs in operating voltage and maximum clock frequency specifications. The device is designed for general-purpose data storage where moderate speed and robust protection features are prioritized over high-density capacity.

Replacement Considerations

Direct substitutes include other 2Kb I²C EEPROMs from Microchip such as the 24AA02 series, though pinouts and feature sets may vary. Verify electrical characteristics and package dimensions before replacing to ensure mechanical and electrical compatibility.