Memory & Logic

Overview

The AT25SF321B is a member of our standard class code and data storage solutions designed for 3V systems in which program code is shadowed from Flash memory into embedded or external RAM for execution.

The architecture includes erase block sizes that are optimized to meet the needs of today's code and data storage applications and three security register pages for unique device serialization, system-level Electronic Serial Number (ESN) storage, locked key storage, etc.

  • Universally compatible pinout and command set
  • Standard block architecture
  • Supports Dual I/O, Quad I/O and XiP operation
  • Continuous read, wrap and burst modes for XiP
AT25x
AT25x
Multi-Protocol Industrial Ethernet Switch
Real-Time Industrial Ethernet Switch (Low Cost) with RZ/N1S
Embedded Programmable Logic Controller (PLC) for Industrial Use
HMI Solution Board with High-End 32-Bit MCU
1-Phase Power Meter
Electric Vehicle (EV) Charger Wall Box

Documentation

Title Type Date
AT25SF321B Datasheet
PDF1.87 MB
Datasheet
AN407: Migrating from Macronix NOR Flash to Renesas NOR Flash
ZIP401 KB
Application Note
AN502: FAQs: NOR Flash Application Note
PDF355 KB
Application Note
AN115 Flash Protection Schemes and Methods
PDF794 KB
Application Note
AN501: Power-Up/Down Considerations in NOR Flash
PDF663 KB
Application Note
AN500:NOR Flash Memory Erase Operation
PDF956 KB
Application Note
AN005 Rev A Active Interrupt Proven to Lower Power Consumption
PDF1.10 MB
Application Note
AN111: Implementing Ultra Deep Power Down Mode in AT25xx Series and AT45xx Series
PDF504 KB
Application Note
AN105 PCB Design and Layout Considerations
PDF313 KB
Application Note
SPI NOR Flash Product Selector
PDF769 KB
Brochure
SPI NOR FLASH Guide - Standard and System Enhancing Memory
PDF769 KB
Guide
How System Level Noise in Digital Interfaces can Lead to Spurious Errors in Serial Flash Memory
PDF1.00 MB
Other
Adesto Serial Flash Power Saving Features and Concepts
PDF1.21 MB
Other
Dual Quad Products Overview
PDF1.14 MB
Product Brief
PCN071A Change Wide SOIC and 5x6mm DFN packaging from Au (Gold) wire bonding, to Cu (Copper) wire bonding
PDF195 KB
Product Change Notice
PCN034 Addendum: Capacity Expansion for the .150" Narrow SOIC Product Package
PDF100 KB
Product Change Notice
PCN034: Capacity Expansion for the .150" Narrow SOIC Product Package
PDF615 KB
Product Change Notice
PCN038: Wafer Probe Facility Addition Teraprobe
PDF92 KB
Product Change Notice
PCN039: Wafer Probe Test Equipment Transfer
PDF142 KB
Product Change Notice
PCN044: Manufacturing Capacity Expansion; narrow .150" SOIC device package
PDF183 KB
Product Change Notice
PCN045: Capacity Expansion Greatek Taiwan for Wide and Narrow SOIC Packages
PDF193 KB
Product Change Notice
PDF-SF004: Adesto® Serial Flash & DataFlash® Products Package Marking Change
PDF97 KB
Product Change Notice
PDF-SF005: Adesto® Products – Wafer Probe Test Site
PDF647 KB
Product Change Notice
PDF-SF022: Capacity Expansion for the UDFN Product Package
PDF138 KB
Product Change Notice
PDF-SF026:Capacity Expansion for the .208" Wide SOIC Product Package
PDF148 KB
Product Change Notice
PDF032: Manufacturing Capacity Expansion for the 8-contact, 6 x 8mm VDFN Package
PDF528 KB
Product Change Notice
Tech Note TN-111, Effect of Excessive Number of CS Toggle Operations on AT25SF641 and AT25QF641
PDF399 KB
White Paper

Design & Development

ECAD Models

Schematic symbols, PCB footprints, and 3D CAD models from SamacSys can be found by clicking on products in the Product Options table. If a symbol or model isn't available, it can be requested directly from the website.

Explore ECAD Models

Models

Title Type Date
AT25SF321B IBIS Model
ZIP46 KB
Model - IBIS
AT25SF321B Verilog Model
ZIP15 KB
Model - Verilog

Product Options

    Processing table
    Part Number
    Pkg. Type
    Carrier Type
    Buy / Sample
    AT25SF321B-SSHB-B
    play_circleActive
    memory
    view_in_ar
    		SOIC-N Tube
    AT25SF321B-SSHB-T
    play_circleActive
    memory
    view_in_ar
    		SOIC-N Tape & Reel
    AT25SF321B-SHB-B
    play_circleActive
    memory
    view_in_ar
    		SOIC-W Tube
    AT25SF321B-SHB-T
    play_circleActive
    memory
    view_in_ar
    		SOIC-W Tape & Reel
    AT25SF321B-MHB-T
    play_circleActive
    memory
    view_in_ar
    		DFN Tape & Reel
    AT25SF321B-DWF
    play_circleActive
    memory
    view_in_ar
    		DWF
    Parametric Table tips

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    • Cart icon to the right of the chip icon: Indicates that samples are available for this product