34AA02-E/SN

Overview

The Microchip Technology 34AA02-E/SN is a 2 Kbit (256 x 8) serial EEPROM housed in an 8-lead SOIC package. It operates on a single supply voltage ranging from 1.7V to 5.5V and supports I²C compatible 2-wire serial interfaces with clock frequencies up to 400 kHz. 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

• Supports bidirectional 2-wire serial interface bus compatible with standard I²C protocols
• Provides both permanent and resettable software write protection for the lower half of the memory array
• Includes hardware write protection capability for the entire array through the dedicated WP pin
• Features Schmitt trigger inputs for noise suppression and output slope control to eliminate ground bounce

Applications

• Data storage in industrial systems requiring robust noise immunity
• Configuration memory for automotive electronic modules operating across extended temperature ranges
• Embedded systems needing secure parameter storage with flexible write-protection schemes

Procurement Notes

Verify that the ordering suffix 'E' corresponds to the Automotive temperature range (-40°C to +125°C) rather than the Industrial range. Confirm the 'SN' suffix indicates the 8-lead SOIC package type. Ensure compatibility with the system's I²C bus voltage levels and pull-up resistor requirements before finalizing procurement specifications.

Selection Notes

Select this component when application requirements demand operation down to 1.7V and include exposure to temperatures up to 125°C. The device is suitable for designs requiring specific protection of the lower 128 bytes against accidental modification while maintaining full access to the upper array. Consider the 400 kHz maximum clock speed for bandwidth constraints.

Part Context

This part belongs to the 34XX02 family of 2 Kbit serial EEPROMs manufactured by Microchip Technology. The family includes variants like the 34LC02 which supports higher clock speeds but has a different minimum voltage threshold. The 34AA02 series is designed for applications requiring reliable non-volatile storage with flexible protection mechanisms.

Replacement Considerations

Direct substitutes within the same package and electrical specifications include other 34AA02 variants with different temperature grades or package types. Cross-referencing with the 34LC02 requires verifying voltage and clock frequency compatibility.