NV25256DWVLT3G

Memory IC Overview

The NV25256DWVLT3G is a 256 kbit (32K x 8) Serial Peripheral Interface (SPI) EEPROM manufactured by onsemi. It operates within a supply voltage range of 2.5 V to 5.5 V and supports clock frequencies up to 10 MHz in SPI modes (0,0) and (1,1). The device features a 64-byte page write buffer, hardware and software write protection, and an additional Identification Page with permanent write protection capability. It includes Byte Level On-Chip ECC for high reliability applications. Qualified under Automotive AEC-Q100 Grade 0, it functions from -40°C to +150°C and offers 200-year data retention.

Memory IC Feature Summary

• Automotive AEC-Q100 Grade 0 qualification for extended temperature operation
• Byte Level On-Chip Error Correction Code (ECC) for enhanced data reliability
• Hardware and Software Write Protection including Block and Identification Page locking
• Additional Identification Page accessible via Status Register control

Memory IC Applications

• Automotive systems requiring site and change control
• High reliability industrial memory storage
• Data logging in environments with strict durability requirements

Memory IC Procurement Notes

Verify the specific suffix 'DW' corresponds to the SOIC-8 package and 'LT3G' indicates tape and reel shipping. Confirm that the required operating voltage aligns with the datasheet's 2.5 V minimum, as some sources list lower voltages which may not be supported by this specific automotive grade part. Ensure compliance with RoHS and Pb-Free standards if required by your assembly process.

Memory IC Selection Notes

Select this component when automotive-grade reliability and wide temperature operation are mandatory. The presence of on-chip ECC makes it suitable for critical data storage where single-bit errors must be corrected. Compare against NV25128 variants if smaller capacity suffices, or consider non-automotive grades if cost sensitivity outweighs the need for AEC-Q100 certification and extended thermal limits.

Memory IC Part Context

This part belongs to the NV25xxx family of SPI EEPROMs designed for automotive and general-purpose applications. It shares functional similarities with the NV25128 but provides double the density. The 'NV' prefix signifies adherence to strict site and change control protocols typical for automotive supply chains. It replaces older CAT25256 series parts in modern designs requiring higher reliability.

Memory IC Replacement Considerations

NV25128DWHFT3G: Lower density (128 kb), otherwise similar interface and package.

Memory IC FAQ

Can the Identification Page be permanently locked?

Yes, the LIP bit in the Status Register can be set to permanently lock the Identification Page in read-only mode.

What is the maximum endurance at elevated temperatures?

Endurance decreases with temperature; it is rated for 300,000 program/erase cycles at +150°C.