34AA02T-I/MS

Overview

The Microchip Technology 34AA02T-I/MS 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 of 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. Packaged in an 8-lead MSOP, it offers a page write buffer of 16 bytes, typical standby current of 1 µA, and data retention exceeding 200 years.

Feature Summary

• Supports bidirectional 2-wire serial communication with standard and fast mode compatibility
• Provides flexible write protection through permanent or resettable software commands and a dedicated hardware pin
• Features Schmitt trigger inputs and output slope control to suppress noise and eliminate ground bounce
• Includes a 16-byte page write buffer to optimize bus throughput during sequential data writes

Applications

• Embedded systems requiring non-volatile storage for configuration parameters
• Industrial devices needing reliable data retention under varying voltage conditions
• Battery-powered applications utilizing low standby current modes
• Systems requiring specific memory sectors to be permanently locked against modification

Procurement Notes

Verify that the ordering suffix 'I' corresponds to the industrial temperature range (-40°C to +85°C). Confirm the package designation matches the required surface-mount form factor. Ensure system design accounts for the specific voltage thresholds required to activate software write-protection commands on address pins.

Selection Notes

Select this component when a small capacity EEPROM with robust write-protection features is necessary. It is suitable for designs operating at voltages as low as 1.7V where power efficiency is critical. Consider the MSOP package dimensions for board space constraints and verify that the I²C bus timing requirements align with the master controller specifications.

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 minimum operating voltage and maximum clock frequency specifications. The series is designed for general-purpose non-volatile memory applications across various consumer and industrial electronics.

Replacement Considerations

Direct substitutes include other 2Kb I²C EEPROMs from Microchip such as the 24AA02 series, though interface protocols and pinouts may differ. Cross-manufacturer equivalents should be evaluated based on voltage ranges, package types, and write-protection mechanisms.