34LC02-E/MS

Overview

The Microchip Technology 34LC02-E/MS is a 2 Kbit (256 x 8) serial EEPROM utilizing an I²C-compatible 2-wire interface. It operates on a single supply voltage ranging from 2.2V to 5.5V with a maximum clock frequency of 1 MHz. The device supports page writes up to 16 bytes and features both permanent and resettable software write protection for the lower half of the array, alongside hardware protection via the WP pin. It is housed in an 8-lead MSOP package and qualified for extended temperature ranges.

Feature Summary

• Features dual software write-protection mechanisms allowing selective or permanent locking of the lower memory half
• Includes a dedicated hardware Write-Protect pin to secure the entire memory array
• Supports cascading up to eight devices on a single bus using chip select pins
• Incorporates Schmitt trigger inputs and output slope control for noise suppression

Applications

• Data logging systems requiring non-volatile storage
• Configuration parameter storage in embedded controllers
• Calibration data retention in industrial instrumentation
• Device identification and security code storage

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 'MS' suffix indicates the MSOP-8 package type. Ensure the specific revision matches the required datasheet version DS22029F. Cross-reference the manufacturer part number directly with official Microchip documentation to avoid confusion with similar I²C EEPROM models.

Selection Notes

Select this component when high-speed 1 MHz I²C communication is required compared to standard 400 kHz limits. Choose the E-temperature grade if the application environment exceeds standard industrial limits. The MSOP package is suitable for space-constrained surface-mount designs. Consider the 16-byte page buffer efficiency for frequent small data updates versus byte-write operations.

Part Context

This device belongs to the 34XX02 family of 2 Kbit serial EEPROMs manufactured by Microchip Technology. It shares functional similarities with the 34AA02 but offers higher clock speed capabilities. The family is designed for low-power applications requiring reliable non-volatile data retention across various consumer and automotive environments.

Replacement Considerations

Direct substitutes include the 34LC02-I/MS for industrial temperature applications. Other compatible variants within the same package are available under different temperature grades. Verify electrical characteristics and timing parameters before substituting with other manufacturers' I²C EEPROMs.