34LC02-I/SN

Overview

The Microchip Technology 34LC02-I/SN 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 1.7V to 5.5V, with the LC variant supporting a maximum clock frequency of 1 MHz at VCC ≥ 2.5V. The device features permanent and resettable software write-protect for the lower half of the array, alongside hardware protection via the WP pin. It includes a 16-byte page write buffer, Schmitt trigger inputs for noise suppression, and output slope control. The Industrial temperature grade (-40°C to +85°C) ensures reliability in standard commercial applications.

Feature Summary

• Supports bidirectional 2-wire serial communication compatible with I²C protocols
• Provides flexible data security through permanent or resettable software write-protection for the lower memory half
• Includes hardware write-protection capability accessible via the dedicated WP pin

Applications

• Data logging systems requiring non-volatile storage
• Configuration parameter storage in embedded controllers
• Calibration data retention in industrial instrumentation

Procurement Notes

Verify that the specific ordering suffix matches the required package type and temperature range. Confirm that the component meets RoHS compliance standards if applicable to your manufacturing process. Ensure the supplier provides valid traceability documentation for quality assurance purposes.

Selection Notes

Select this component when high-speed serial access up to 1 MHz is required within the specified voltage range. Consider the 34LC02 over the 34AA02 if operation below 2.2V is not needed but higher bus speeds are desired. Evaluate the need for software versus hardware write protection based on system security requirements.

Part Context

This part belongs to the 34XX02 family of serial EEPROMs manufactured by Microchip Technology. It shares functional similarities with the 34AA02 but offers enhanced clock speed capabilities. The device is designed for low-power applications and integrates advanced noise filtering features suitable for noisy electrical environments.

Replacement Considerations

The 34AA02 serves as a direct functional substitute with identical pinouts and memory organization, though it supports a lower maximum clock frequency of 400 kHz. Verify compatibility regarding operating voltage thresholds and timing specifications before substitution.