34LC02-I/ST

Overview

The Microchip Technology 34LC02-I/ST 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, with a maximum clock frequency of 1 MHz for the LC version. The device supports page writes up to 16 bytes and includes software write-protect features for the lower half of the array, alongside hardware protection via the WP pin. It is housed in an 8-pin TSSOP package and rated for industrial temperatures between -40°C and +85°C.

Feature Summary

• Supports bidirectional data transfer over a standard 2-wire serial bus compatible with I²C protocols.
• Provides permanent and resettable software write-protection for the lower half of the memory array.
• Includes Schmitt trigger inputs and output slope control to suppress noise and eliminate ground bounce.
• Features self-timed erase/write cycles with internal write cycle termination.

Applications

• Data storage in low-voltage embedded systems
• Configuration parameter retention in microcontroller circuits
• Device identification and calibration data logging

Procurement Notes

Verify that the ordering suffix 'I' corresponds to the Industrial temperature range (-40°C to +85°C) and '/ST' indicates the TSSOP-8 package. Confirm the specific voltage requirements align with the 34LC02 series specifications, which support operation down to 1.7V. Ensure compatibility with the system's I²C bus voltage levels before integration.

Selection Notes

Select this component when a 2 Kbit non-volatile memory solution is required with high-speed 1 MHz I²C communication capabilities. It is suitable for designs needing flexible write-protection schemes for critical data segments. Consider the TSSOP-8 package constraints and ensure the application environment remains within the specified industrial temperature limits.

Part Context

This part belongs to the 34AA02/34LC02 family of 2 Kbit serial EEPROMs. While sharing similar interfaces and architectures, the 34LC02 variant specifically supports higher clock frequencies up to 1 MHz compared to the 34AA02. Both variants offer identical memory organization and write-protection features but differ in maximum operating speed specifications.

Replacement Considerations

Direct substitutes include the 34AA02-I/ST, noting the reduced maximum clock frequency limit. Other 2 Kbit I²C EEPROMs may require verification of voltage ranges and pinout compatibility.