AT25SF321B-DWF

Memory IC Overview

The AT25SF321B-DWF is a 32Mbit SPI serial flash memory component designed for 3V systems. It operates within a voltage range of 2.7V to 3.6V and supports clock speeds up to 108 MHz. The device features single, dual, and quad I/O interfaces with Execute-in-Place (XiP) capabilities. It includes optimized erase block sizes and three security register pages for serialization and key storage. Operating temperatures range from -40°C to +85°C. The DWF package variant utilizes a specific footprint distinct from standard SOIC or DFN options.

Memory IC Feature Summary

• Supports Dual I/O, Quad I/O, and XiP operations for flexible data access
• Includes three security register pages for unique device serialization and locked key storage
• Features universally compatible pinout and command set for easy integration

Memory IC Applications

• Level 2 electric vehicle chargers
• Smart robot vacuum cleaners
• Single-phase electricity meters
• Intelligent HMI systems with voice and display interfaces

Memory IC Procurement Notes

Verify the exact package designation against official Renesas documentation, as the DWF suffix indicates a specific form factor that may differ from common SOIC or DFN variants. Confirm availability status directly with authorized distributors, as supply levels fluctuate. Ensure the selected variant matches the required board layout dimensions and pitch specifications provided in the official datasheet before finalizing procurement orders.

Memory IC Selection Notes

Select this component when designing 3V embedded systems requiring code shadowing to RAM for execution. It is suitable for applications needing secure data storage via dedicated security registers. Consider the DWF package constraints if space is limited. Verify compatibility with existing MCU SPI controllers supporting dual or quad modes. Ensure operating conditions align with the specified temperature and voltage ranges for reliable performance.

Memory IC Part Context

This part belongs to the AT25SF321B series of standard class NOR flash memories. It shares architectural similarities with other members like the AT25SF161B but offers higher density. The series is characterized by low power consumption and high-speed interface support. It is manufactured by Renesas Electronics Corporation, formerly Dialog Semiconductor, focusing on code and data storage solutions for consumer and industrial electronics.

Memory IC Replacement Considerations

Direct substitutes include the AT25SF321B-SHB-T and AT25FF321A-SHN-T. Verify pinout compatibility and package dimensions before substitution. The AT25SF321-SHD-T is an obsolete predecessor; ensure functional equivalence regarding speed and voltage requirements.