34AA02T-I/SN

Overview

The Microchip Technology 34AA02T-I/SN is a 2 Kbit (256 x 8) serial EEPROM featuring an I²C-compatible 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. It utilizes low-power CMOS technology with standby current as low as 100 nA and offers data retention exceeding 200 years.

Feature Summary

• Features dual software write-protect modes allowing selective or permanent locking of the lower memory half
• Includes hardware write-protection capability through the dedicated WP pin for full array security
• Supports cascading up to eight devices on a single bus using chip select pins
• Incorporates Schmitt trigger inputs and output slope control to suppress noise and ground bounce

Applications

• Low-voltage embedded systems requiring non-volatile data storage
• Industrial applications needing robust noise immunity and wide operating temperature ranges
• Battery-powered devices utilizing low standby current consumption
• Systems requiring configurable data protection for critical parameters

Procurement Notes

Verify that the ordering suffix 'I' corresponds to the Industrial temperature range (-40°C to +85°C). Confirm the 'SN' suffix indicates the 8-lead SOIC package type. Ensure compatibility with the system's I²C bus voltage levels, noting that clock frequency limits vary based on the specific VCC supply voltage applied during operation.

Selection Notes

Select this component when a 2 Kbit capacity is sufficient for application requirements. Choose this part over the 34LC02 variant if operation below 2.2V is necessary, as the LC version requires a minimum of 2.2V. Consider the TDFN package option if a smaller footprint is preferred, though the SN suffix specifically denotes the SOIC package.

Part Context

This device belongs to the 34XX02 family of serial EEPROMs manufactured by Microchip Technology. It shares functional similarities with the 34LC02 but differs in its minimum operating voltage specifications. The family is designed for general-purpose non-volatile memory applications where space and power efficiency are primary design constraints.

Replacement Considerations

The 34LC02 serves as a compatible alternative within the same family, provided the system voltage remains above 2.2V. Other 2 Kbit I²C EEPROMs may require verification of pinout compatibility and voltage level alignment before substitution.