AT25SF321B-SHB-B

Memory IC Overview

The AT25SF321B-SHB-B is a 32 Mbit SPI NOR flash memory device manufactured by Renesas Electronics Corporation. It operates within a voltage range of 2.7 V to 3.6 V and supports clock frequencies up to 108 MHz. The component features a 4 M x 8 organization and is housed in an 8-SOIC package with a narrow body width of 3.81 mm. It functions across a temperature range of -40°C to +85°C, supporting single, dual, and quad I/O interfaces for flexible system integration.

Memory IC Feature Summary

• Supports execute-in-place (XiP) operations including continuous read, wrap, and burst modes for direct code execution from the flash memory.
• Includes three dedicated security register pages designed for unique device serialization, electronic serial number storage, and locked key management.
• Features a standard block architecture with optimized erase block sizes tailored for modern code and data storage applications.

Memory IC Applications

• Level 2 electric vehicle chargers
• Smart robotic vacuum cleaners
• Single-phase electricity meters
• Intelligent human-machine interface systems

Memory IC Procurement Notes

Verify the specific suffix 'B' against official datasheets to confirm it denotes the tube packaging format rather than a functional variant. Ensure the ordering information matches the required package dimensions and moisture sensitivity level. Cross-reference the manufacturer part number with current product status to confirm long-term availability and active supply chain support.

Memory IC Selection Notes

Select this component when a 32 Mbit capacity is required for 3V embedded systems needing high-speed access via SPI interfaces. Consider the 8-SOIC package for surface-mount assembly constraints. Evaluate the need for XiP capabilities and security features if the application involves executing code directly from memory or requires device authentication mechanisms.

Memory IC Part Context

This part belongs to the AT25SF321B series of SPI NOR flash memories designed for 3V systems. It shares universal pinout compatibility and command sets with other devices in the AT25xF family, facilitating easier migration between different memory densities while maintaining consistent software driver architectures.

Memory IC Replacement Considerations

Direct substitutes include the AT25SF321B-SHB-T, which offers identical electrical specifications but utilizes tape-and-reel packaging instead of tubes. Other variants within the AT25SF321B series may be considered if package type flexibility is required.