AT25SF321B-MHB-T

Memory IC Overview

The AT25SF321B-MHB-T 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 memory organization is specified as 4M x 8 bits. The component is housed in an 8-lead DFN package with dimensions of 5 mm by 6 mm and a pitch of 1.27 mm. It functions across a temperature range of -40°C to +85°C.

Memory IC Feature Summary

• Supports Single, Dual I/O, and Quad I/O SPI interface modes for flexible data transfer speeds.
• Enables Execute-in-Place (XiP) operation with continuous read, wrap, and burst modes for direct code execution.
• Includes three dedicated security register pages for unique device serialization, Electronic Serial Number storage, and locked key management.

Memory IC Applications

• Two-level electric vehicle chargers
• Modular EVSE systems
• Smart robot vacuums
• Single-phase electricity meters
• Intelligent HMI systems

Memory IC Procurement Notes

Verify the specific suffix 'MHB-T' against official Renesas documentation to confirm the tape and reel packaging format and lead-free status. Ensure the ordering part number matches the required package type and moisture sensitivity level before procurement. Cross-reference the manufacturer's latest product change notices to confirm current production status and availability timelines.

Memory IC Selection Notes

Select this component when a 32 Mbit capacity is required for code shadowing or data storage in 3V systems. It is suitable for designs needing high-speed access via Quad I/O or XiP capabilities. Consider the compact DFN footprint for space-constrained PCB layouts. Verify that the operating voltage and temperature ranges align with the target system environment.

Memory IC Part Context

This device belongs to the AT25SF321B series of standard class SPI NOR flash memories designed for 3V systems. It features a universally compatible pinout and command set with other devices in the family. The architecture includes optimized erase block sizes for efficient code and data storage applications.

Memory IC Replacement Considerations

Direct substitutes include the AT25SF321B-SHB-B and AT25SF321B-SHB-T, which offer identical electrical specifications but utilize an SOIC-W package instead of the DFN form factor. Verify pin compatibility and thermal requirements when transitioning between package types.