34LC02-E/ST

Overview

The Microchip Technology 34LC02-E/ST is a 2 Kbit (256 x 8) serial EEPROM housed in an 8-lead TSSOP package. It operates on a single supply voltage ranging from 2.2V to 5.5V and supports a maximum clock frequency of 1 MHz. The device features a 2-wire I²C compatible interface, Schmitt trigger inputs for noise suppression, and output slope control to eliminate ground bounce. It offers more than one million erase/write cycles and data retention exceeding 200 years.

Feature Summary

• Features permanent and resettable software write-protect capabilities for the lower half of the memory array alongside hardware protection via the WP pin.
• Supports cascading up to eight devices on the same bus using chip select bits A0, A1, and A2.
• Includes a 16-byte page write buffer to facilitate efficient sequential data writing operations.

Applications

• Industrial systems requiring robust data storage with extended temperature range capabilities
• Automotive electronics operating within high thermal environments
• Embedded controllers needing non-volatile configuration storage

Procurement Notes

Verify that the ordering suffix 'ST' corresponds specifically to the TSSOP package type as defined in the official datasheet. Confirm the 'E' suffix indicates the Automotive grade qualification (-40°C to +125°C). Ensure compatibility with the required voltage levels and interface protocols before finalizing procurement orders.

Selection Notes

Select this component when application requirements demand operation at clock frequencies up to 1 MHz, which exceeds the 400 kHz limit of the standard 34AA02 variant. Choose the E-grade version for automotive applications requiring extended temperature ranges up to +125°C. The TSSOP package is suitable for space-constrained surface mount designs.

Part Context

This part belongs to the 34XX02 family of 2 Kbit serial EEPROMs manufactured by Microchip Technology. The family includes variants like the 34AA02 and 34LC02, differentiated primarily by maximum clock speed and operating voltage thresholds. The 34LC02 series is optimized for higher speed performance compared to the baseline AA models.

Replacement Considerations

The 34LC02-I/ST serves as the Industrial grade equivalent with a -40°C to +85°C range. The 34AA02-E/ST is a functional substitute but is limited to a 400 kHz maximum clock frequency. Verify package integrity and temperature specifications when substituting.