34AA02T-E/OT

Overview

The Microchip Technology 34AA02T-E/OT is a 2 Kbit (256 x 8) serial EEPROM housed in a 6-lead SOT-23 package. It operates on a single supply voltage ranging from 1.7V to 5.5V and supports I²C compatible 2-wire serial interfaces with maximum clock frequencies of 100 kHz or 400 kHz depending on the supply voltage. The device features permanent and resettable software write protection for the lower half of the array, alongside hardware write protection via the WP pin. It offers high endurance exceeding one million erase/write cycles and data retention greater than 200 years.

Feature Summary

• Features permanent and resettable software write protection for the lower half of the memory array.

Applications

• Data storage requiring low-voltage operation
• Systems needing hardware and software write protection

Procurement Notes

Verify that the specific ordering suffix matches the required temperature range and package type. Confirm interface compatibility with the target system's I²C bus specifications. Ensure the design accounts for the limited chip select options available in the SOT-23 package compared to larger packages.

Selection Notes

Select this component when a compact surface-mount solution is required for small capacity non-volatile storage. The extended temperature range (-40°C to +125°C) makes it suitable for automotive or industrial environments. Consider the page write buffer size and bus timing requirements during system integration.

Part Context

This part belongs to the 34AA02/34LC02 family of 2 Kbit serial EEPROMs. While sharing core architecture with other variants, the 'E' suffix denotes an extended temperature rating up to +125°C, and the '/OT' indicates the specific 6-lead SOT-23 packaging configuration used for space-constrained designs.

Replacement Considerations

Direct replacements include other 34AA02 variants with different packages such as SOIC or TSSOP, provided the pinout differences are accommodated in the PCB layout. Cross-referencing with similar 2Kb I²C EEPROMs requires verifying voltage ranges and write-protection logic compatibility.