34AA02T-E/SN

Overview

The Microchip Technology 34AA02T-E/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 utilizes low-power CMOS technology with typical standby current of 100 nA and read current of 1 mA. The component offers over one million erase/write cycles and data retention exceeding 200 years.

Feature Summary

• Features dual software write-protect mechanisms allowing selective locking of the lower memory half, complemented by a dedicated hardware pin for full array protection.
• Incorporates Schmitt trigger inputs and output slope control to suppress noise spikes and eliminate ground bounce during operation.
• Supports page write operations utilizing a 16-byte buffer to enhance bus throughput efficiency.

Applications

• Embedded systems requiring non-volatile storage for configuration parameters
• Industrial control units needing reliable data retention under varying temperatures
• Automotive electronics demanding extended endurance and high ESD protection

Procurement Notes

Verify that the ordering suffix 'E' corresponds to the Automotive temperature range (-40°C to +125°C) rather than Industrial specifications. Confirm the 'SN' suffix indicates the SOIC-8 package type. Ensure compatibility with system voltage levels, noting the minimum operating voltage is 1.7V. Check datasheet requirements for pull-up resistor values based on the selected bus speed.

Selection Notes

Select this component when application requirements demand automotive-grade temperature stability combined with flexible memory protection schemes. The 34AA02T-E/SN is suitable for designs prioritizing low power consumption and robust noise immunity. Consider the 400 kHz maximum clock frequency for bandwidth constraints. Evaluate the need for hardware versus software write protection strategies before finalizing the design.

Part Context

This part belongs to the 34AA02/34LC02 family of 2 Kbit serial EEPROMs manufactured by Microchip Technology. While the 34LC02 variant supports higher clock speeds at elevated voltages, the 34AA02 series focuses on broad voltage compatibility down to 1.7V. The specific model integrates automotive qualification features within the standard 8-pin surface-mount footprint.

Replacement Considerations

Direct substitutes include other 2 Kbit I²C EEPROMs from Microchip such as the 24AA02 or 24LC02 series, provided they meet the specific temperature and voltage requirements. Verify pinout compatibility and write-protect functionality differences when cross-referencing with competitor devices like STMicroelectronics M24C02.