Model & package intelligence
Model text, package form, tray or reel details, and visual evidence are reviewed together before RFQ feedback.
MICROCHIP AT93C66B-MAHM-T AT93C66B
Configuration
1 options
Configuration
23+
Available for RFQ
Technical data
Product details
19
specifications
Core information
- Product name
- MICROCHIP AT93C66B-MAHM-T
- Type
- MICROCHIP
- Minimum package
- 5000 圆盘
Technical parameters
- Electronic Component
- Electronic Component
- Electronic Component
- MICROCHIP
- Electronic Component
- AT93C66B-MAHM-T
- Electronic Component
- 1
- Package
- UDFN-8L-EP(2x3)
- Electronic Component
- EEPROM
- Electronic Component
- 0.001g
- Electronic Component
- 1
- Features
- Built-in positions(POR)
- Electronic Component
- BM0264751691
- Electronic Component
- 4Kbit
- Operating Temperature
- 40℃~+85℃
- Operating Voltage
- 1.7V~5.5V
- Interface Type
- SPI
- Electronic Component
- 100
- Clock Frequency(fc)
- 2MHz
For datasheets, package documents, compatible-part guidance, or other technical resources, contact WMSIC customer service. Availability is confirmed case by case.
AT93C66B-MAHM-T 产品概述
一、简介
AT93C66B-MAHM-T 是 Microchip（美国微芯）推出的 4Kbit 串行 EEPROM，采用 SPI 兼容的串行接口，最高工作时钟 2 MHz。器件支持两种存储组织：512 x 8 或 256 x 16，满足配置参数、校准数据、序列号及小容量固件存储等应用需求。封装为 UDFN-8L-EP（Mini-Map 2x3），适合空间受限的表面贴装场合。
二、关键规格
- 存储容量：4 Kbit（512 x 8 或 256 x 16）
- 接口类型：SPI 兼容串行接口，最高时钟频率 fc = 2 MHz
- 工作电压：1.7 V ～ 5.5 V（宽电源范围，适合低压电池供电系统）
- 工作温度：-40 ℃ ～ +85 ℃（工业级）
- 写周期时间 Tw：典型 5 ms（单字节/字写入时间）
- 擦写寿命/写周期寿命：1,000,000 次（高耐久）
- 数据保存期 TDR：100 年（长期非易失性保存）
- 功能特性：内置上电复位（POR）、硬件写保护（WP）
三、封装与布局建议
UDFN-8L-EP（2x3）小型封装利于紧凑 PCB 设计。建议在焊盘设计中为底部散热焊盘（EP）留足焊盘及通孔过孔，以保证焊接可靠性和热量分布。器件靠近主控器件布线以缩短 SPI 走线，数据线添加 33Ω~100Ω 串联阻尼以抑制反射；VCC 旁放置 0.1 µF 去耦电容以稳定供电，避免在写周期内电压跌落引发写入错误。
四、设计与使用要点
- 写入管理：写周期约为 5 ms，建议写操作后通过状态位或轮询检查写完成，避免在写期间重复启动新写操作。
- 硬件写保护：使用 WP 针脚在敏感数据更新前后切换写保护，物理高电平可锁定写操作以防误写。
- 电源与 POR：器件带内置上电复位，但系统电源需满足升降压斜率要求，避免在 VCC 较低或不稳定时进行写入。
- 寿命优化：尽管器件写入寿命高达 1,000,000 次，仍建议对频繁更新的数据采用软件层的擦写均衡或缓存策略以延长整体系统寿命。
- 兼容性：SPI 信号时序与主控 MCU 的 SPI 模式匹配，最高 2 MHz，确保时序裕量以获得稳定通信。
五、典型应用
- 工业控制与传感器校准数据保存
- 物联网设备、可穿戴与手持终端的配置与日志存储
- 通讯设备参数、序列号及出厂设定存储
- 电池供电设备的低压工作场景
AT93C66B-MAHM-T 以其宽电压、长数据保持、高写寿命及小型封装，适合对可靠性和空间要求较高的嵌入式系统。根据应用场景合理安排写入频率与硬件写保护，可发挥器件的长期稳定性与耐用性。
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