34AA02T-E/MNY

Overview

The Microchip Technology 34AA02T-E/MNY 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 utilizes low-power CMOS technology, offering typical standby current of 100 nA and read current of 1 mA. It includes permanent and resettable software write-protect capabilities for the lower half of the array, alongside hardware protection via the WP pin. The component is housed in an 8-TDFN package and is qualified for automotive applications with an extended temperature range.

Feature Summary

• Features dual software write-protect mechanisms 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 of up to eight devices on a single bus using chip select address pins
• Incorporates Schmitt trigger inputs and output slope control to suppress noise and eliminate ground bounce

Applications

• Automotive electronic systems requiring non-volatile data storage
• Industrial equipment needing reliable parameter retention
• Consumer electronics utilizing low-voltage power supplies
• Embedded controllers storing configuration settings

Procurement Notes

Verify that the ordering suffix 'E' corresponds to the Automotive temperature grade (-40°C to +125°C). Confirm the 'T' indicates tape and reel packaging. Ensure the 'MNY' designation matches the required 8-TDFN package dimensions. Cross-reference the datasheet revision to confirm compatibility with specific system timing requirements.

Selection Notes

Select this part when automotive qualification is mandatory for EEPROM applications. Choose this model over the Industrial version if operation above 85°C is required. Consider the 34LC02 variant only if higher clock speeds are needed at voltages above 2.5V. Verify that the 400 kHz interface speed meets the system's bus throughput needs.

Part Context

This component belongs to the 34XX02 family of serial EEPROMs manufactured by Microchip Technology. It shares architectural similarities with the 24AA02 series but offers distinct voltage ranges and write-protection features. The device is designed to replace legacy parallel EEPROMs in space-constrained designs while maintaining data integrity across wide operating conditions.

Replacement Considerations

Public confirmed substitute: 34AA02T-I/MNY (Industrial temperature grade).