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MICROCHIP 24LC256-I/SM 24LC256
Configuration
1 options
Configuration
25+
Available for RFQ
Technical data
Product details
20
specifications
Core information
- Product name
- MICROCHIP 24LC256-I / SM
- Type
- MICROCHIP
- Unit
- Electronic Component
- Minimum package
- 90 管
Technical parameters
- Electronic Component
- Electronic Component
- Electronic Component
- Electronic Component
- Electronic Component
- MICROCHIP
- Electronic Component
- 24LC256-I/SM
- Electronic Component
- 1
- Package
- SOIJ-8-5.28mm
- Electronic Component
- EEPROM
- Electronic Component
- 0.472g
- Electronic Component
- 1
- Electronic Component
- BM0227277843
- Electronic Component
- 256Kbit
- Operating Temperature
- 40℃~+85℃
- Operating Voltage
- 2.5V~5.5V
- Interface Type
- I2C
- Electronic Component
- 100
- Clock Frequency(fc)
- 400kHz
For datasheets, package documents, compatible-part guidance, or other technical resources, contact WMSIC customer service. Availability is confirmed case by case.
24LC256-I/SM 产品概述
一、产品简介
Microchip 24LC256-I/SM 是一款高可靠性的 256Kbit 串行 I2C EEPROM（32K x 8）。器件工作电压范围宽（2.5V 至 5.5V），支持 I2C 快速模式（最高 400kHz），适用于工业级温度范围（-40℃ 至 +85℃）。封装为 SOIJ‑8（5.28mm），提供长数据保留与高写入寿命，适合需要非易失性存储的嵌入式与工业应用。
二、主要特性
- 存储容量：256Kbit（32K x 8）
- 接口类型：I2C 双线接口，最高时钟频率 fc = 400kHz（快速模式）
- 工作电压：2.5V ~ 5.5V（单电源）
- 写周期时间（Tw）：典型 5ms（页写完成）
- 页写大小：最多 64 字节（page write）
- 数据保留（TDR）：典型 200 年
- 写周期寿命：1,000,000 次（典型）
- 工作温度：-40℃ ~ +85℃
- 封装：SOIJ‑8‑5.28mm（工业级）
三、引脚与寻址
24LC256 使用标准 I2C 控制字节与 16 位内存地址访问。器件提供硬件地址引脚（A2、A1、A0）用于多器件总线配置（具体请参阅器件手册）。此外提供写保护（WP）引脚，可在需要时硬件禁止写操作以保护数据。
四、电气与总线设计要点
- 总线必须配备合适阻值的上拉电阻（常见 2.2kΩ ~ 10kΩ），根据总线电容与目标速率选择。
- VCC 侧应靠近器件放置去耦电容（0.1µF）以抑制瞬态噪声。
- 对于写操作，应使用 ACK 轮询（ack polling）确认器件完成内部写入，以避免超时等待或频繁读取。
- 在进行页写时，尽量按页对齐（64 字节边界），避免跨页写导致数据回绕。
五、应用建议
- 用于参数存储、配置表、校准数据、序列号与日志保存等场景。
- 在高写入频率场合（例如频繁记录）应评估写入寿命并考虑日志轮替或 wear‑leveling 策略以延长使用周期。
- 对关键数据使用写前校验与写后读取比对，保证数据一致性。
- 利用 WP 引脚实现程序更新或生产线保护时的硬件上锁。
六、兼容与替代
24LC256 与业内常见的 24C256/AT24C256 系列在通信协议和基本特性上高度兼容，方便在现有系统中替换或作为备选型号。选型时注意封装和温度等级以匹配系统机械与可靠性要求。
七、总结
24LC256-I/SM 提供大容量、工业级可靠性的 I2C EEPROM 解决方案。其宽电压范围、长数据保留、百万次写入寿命以及 400kHz 快速 I2C 支持，使其在嵌入式、工业控制、通讯设备与消费类产品中均为稳健的非易失性存储选择。设计时注意上拉、电源去耦、页写对齐与写保护配置，可获得最佳性能与可靠性。若需进一步的时序图、电气参数或 PCB 布局建议，可参考 Microchip 官方数据手册。
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