CAT34C02HU3I-GT4

Memory IC Overview

The CAT34C02HU3I-GT4 is a 2-Kbit (256 x 8) serial EEPROM manufactured by onsemi, designed for DDR2 DIMM SPD applications. It operates within a supply voltage range of 1.7 V to 5.5 V and supports Standard (100 kHz) and Fast (400 kHz) I²C protocols. The device features a 16-byte page write buffer, hardware write protection via the WP pin, and software write protection for the lower half of memory. It includes Schmitt triggers and noise suppression filters on I²C inputs, ensuring reliable data retention for up to 100 years with one million program/erase cycles.

Memory IC Feature Summary

• Supports Standard and Fast I²C communication protocols
• Features hardware write protection for the entire memory array
• Includes software write protection for the lower 128 bytes
• Equipped with Schmitt triggers and noise suppression filters on bus inputs

Memory IC Applications

• DDR2 Serial Presence Detect (SPD)
• General-purpose non-volatile data storage
• Industrial temperature range embedded systems

Memory IC Procurement Notes

Verify the specific HU3 suffix indicates the UDFN-8 package variant when sourcing replacements. Confirm that the I suffix corresponds to the industrial temperature range (-40°C to +85°C). Ensure compatibility with the 1.7 V to 5.5 V operating voltage requirements of the target system design before integration.

Memory IC Selection Notes

Select this component for applications requiring low-voltage operation down to 1.7 V and robust write protection mechanisms. The UDFN-8 package offers a compact footprint suitable for space-constrained designs. Verify that the system master can support both Standard and Fast I²C modes if high-speed data transfer is required.

Memory IC Part Context

This part belongs to the CAT34C02 family of 2-Kbit serial EEPROMs from onsemi. Other variants in the series include TDFN-8 and TSSOP-8 packages, offering flexibility in board layout and thermal management options while maintaining identical electrical characteristics and functionality across the product line.

Memory IC Replacement Considerations

CAT34C02HU4I-GT4

Memory IC FAQ

How does the hardware write protection function?

Holding the WP pin HIGH inhibits all write operations to the entire memory array and protects the software write protection flags.

What is the purpose of the Reversible Software Write Protection?

It allows protection of the lower half of memory (first 128 bytes) using a high voltage on address pin A0, specifically for JEDEC compatible SPD applications.