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RENESAS(瑞萨) AT25DF321A-SH-T
Configuration
1 options
Configuration
26+
Available for RFQ
Technical data
Product details
19
specifications
Core information
- Product name
- RENESAS AT25DF321A-SH-T
- Type
- RENESAS
- Minimum package
- 2000 圆盘
Technical parameters
- Electronic Component
- Electronic Component
- Electronic Component
- RENESAS
- Electronic Component
- AT25DF321A-SH-T
- Electronic Component
- 1
- Package
- SOIC-8-208mil
- Electronic Component
- NOR FLASH
- Electronic Component
- 0.334g
- Electronic Component
- 1
- Electronic Component
- BM0257329956
- Electronic Component
- 32Mbit
- Operating Voltage
- 2.7V~3.6V
- Interface Type
- SPI
- Electronic Component
- 100000
- Clock Frequency(fc)
- 100MHz
- Electronic Component
- Electronic Component
- Electronic Component
- 2000
For datasheets, package documents, compatible-part guidance, or other technical resources, contact WMSIC customer service. Availability is confirmed case by case.
AT25DF321A-SH-T 产品概述
一、产品简介
AT25DF321A-SH-T 为标准串行 NOR 闪存器件，容量 32Mbit（等于 4MByte），通过 SPI 接口访问，适用于需要非易失性代码或数据存储的嵌入式系统。器件工作电压范围 2.7V～3.6V，时钟频率可达 100MHz，提供高性能读写能力并兼顾低功耗特性。
二、主要性能参数
- 存储容量：32Mbit（4MByte）
- 接口类型：标准 SPI
- 最大时钟频率（fc）：100MHz
- 工作电压：2.7V ～ 3.6V
- 页写入时间（Tpp）：典型 1ms
- 擦写寿命：100,000 次（典型）
- 数据保留（TDR）：20 年
三、功能与特点
- 标准串行 NOR 架构，兼容常见 SPI 命令序列，便于替换或升级现有设计。
- 高速 SPI 时钟支持，满足快速代码加载与数据读取需求。
- 较高的擦写寿命与长期数据保留，适合经常更新但需长期保存的数据场景。
- 页写入响应快（Tpp≈1ms），适合小块频繁写入的应用，但写入前需先擦除相应区域。
四、典型应用场景
- 引导固件与代码镜像存储（Boot ROM / Shadow Flash）
- 配置参数、校准数据及序列号等永久性或半永久性数据保存
- 产品固件升级（FOTA、本地升级）
- 数据记录与日志（需配合擦写与磨损均衡策略）
五、设计与使用建议
- 电源与时钟：确保 VCC 稳定并在器件附近增加去耦电容，保持 SPI 时钟不超过 100MHz。
- 写入流程：写入前应执行扇区/块擦除（具体扇区大小以器件资料为准），使用状态寄存器轮询或中断确认写操作完成（Tpp 约 1ms）。
- 保护与可靠性：对重要数据建议增加校验（CRC）与冗余备份；对频繁更新的区域采用磨损均衡（wear leveling）策略以延长寿命。
- 电气接口：在系统上电/掉电时，保证 I/O 端不会受到反向电压或噪声影响；如器件带有 WP/HOLD 等控制引脚，应按需接入以保证写保护与总线控制。
六、可靠性与维护
器件提供典型 100k 次擦写寿命与约 20 年的数据保留期，适合工业级长期部署。对关键信息建议定期检测与多重备份，尤其在高写入频率场景下应关注寿命消耗并做好固件更新策略。
七、小结
AT25DF321A-SH-T 是一款面向嵌入式系统的标准串行 NOR 闪存，兼顾高速 SPI 访问与长期数据保持，适合用于代码存储与配置数据保全。设计时重点关注电源完整性、写前擦除流程与数据完整性保障，可在多种消费类与工业应用中发挥稳定作用。若需更详细的指令集、扇区布局或封装信息，请参考器件完整规格书。
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