M41T81 semiconductor 系列
STMicroelectronics N.V.具有日历、报警和看门狗定时器功能的I2C实时钟IC
STMicroelectronics的M41T81系列是一系列I2C实时时钟（RTC）集成电路，专为需要精确时间记录和调度功能的嵌入式系统设计。这些IC配备了日历功能、闹钟触发器和复位定时器，使其非常适合需要管理时间并确保系统稳定性的应用。
如果您正在从事涉及嵌入式系统的任何项目，特别是那些需要精确时间管理的应用，例如网络设备、工业控制系统或汽车电子产品，M41T81系列可能是一个有价值的补充。日历功能允许进行日期和时间跟踪，而闹钟功能可用于各种定时事件，从简单的提醒到复杂的调度任务。复位定时器对于通过在微控制器卡死或故障时重置其来维持系统完整性至关重要。
值得注意的是，这些IC的工作温度范围较宽，通常从-40°C到+85°C，这使它们适用于恶劣环境。当工程师需要一个可靠且基本功能无需外部组件即可处理各种操作条件的RTC解决方案时，往往会选择这种IC。
系列图片（14 张）
文档与媒体
常见问答
M41T81 semiconductor - 型号列表
共 11 个型号| 制造商零件编号 | 库存 | 价格 | 产品类别 | RoHS | 接口 | 供电电压 | 包装方式 | 封装形式 | 时间格式 | 工作温度 | 安装类型 | 日期格式 | 标准包装数量 | 存储器 | RAM 大小 | 额定电压 | 最小供电电压 | 电池供电电压 | 位数 | 供应商器件封装 | 类型 | 产品特性 | 总线连接 | 工厂包装数量 | 标准封装名称 | 欧盟RoHS | 共模瞬态抗扰度（最小） | 宽度 | 安装样式 | 包装数量 | 功能 | 其他名称 | SVHC | 海关税号 | 重量 | 引脚样式 | 引脚数 | 材料表面处理 | 总长度 | 外壳尺寸-插件 | 印刷电路板数量 | 冷却的封装 | 端接方式 | 机械寿命 | 高度 | 长度 | 尺寸/外形 | 可编程特性 | 最小起订量 | 单位包装 | 汽车级 | 无铅定义 | 数据速率 | 晶体AR（增透膜） | 最大功率 | 最小输入电压 | 匹配码 | 标准交期 | 输出数量 | 基本单元 | 抗辐射加固 | 已删除 | 结工作温度 | SPG | 单元数量 | 产品 | 系列 | 制造商全称 | 电池系列 | 时钟频率 | 零件状态 | 复位时间 | 存储器类型 | 连接器用途 | 主要用途 | 显示单位 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
 Real Time Clock Serial 20Byte 8-Pin SO N T/R IC RTC SERIAL W/ALARM 8-SOIC Real Time Clock Serial 512 (64x8) IC, RTC, I2C, W/ ALARM, 8-SO, REEL RTC circuit; I2C; 2÷5.5VDC; SO8 IC RTC CLK/CALENDAR I2C 8-SOIC 实时时钟 (RTC), 警报功能, 20B RAM, 串行总线, 2 → 5.5 V电源, 8针 SOIC封装 stmicroelectronics | 125 | 1: ¥14.311 | Real Time Clock | Lead free / RoHS Compliant | I²C, 2-Wire Serial | 2.5|3.3|5 V | Tape and Reel | 8SO N | HH:MM:SS:hh | -40 to 85 °C | Surface Mount | DW:DM:M:Y | Cut Tape | 20 B | 20 byte | 2 | 5.5 | 2.5 V ~ 3.5 V | 8 | 8-SO | RTC | Alarm, Leap Year, Square Wave Output, Watchdog Timer | Serial (I2C) | 2500 | SOIC | Compliant | Industrial | 4(Max) | SMD/SMT | SO N | Clock/Calendar/Alarm/Timer/Interrupt | 497-4709-2 | :No SVHC (20-Jun-2013) | 85423300 | 0.003 | Gull-wing | :8 | :MSL 1 - Unlimited | 5(Max) | 1.65(Max) | 8 | - | -40°C | - | - | - | - | - | 2500 | 2500 | NO | RoHS-conform | I2C | NO | 85°C | 2.0V | M41T81M6F | 15 weeks | - | - | - | - | - | 2500 | 1 | - | - | - | - | - | - | - | - | - | - | - |
 | 0 | - | RoHS Compliant | Serial | 5.5 V | Tube | SO-28 | HH:MM:SS:hh | + 85 C | Surface Mount | YY-MM-DD-dd | 28 | 20 B | - | - | - | 2.5 V ~ 3.5 V | - | 8-SO | Clock/Calendar | Alarm, Leap Year, Square Wave Output, Watchdog Timer | - | 28 | - | - | - | - | SMD/SMT | - | Clock, Calendar, Alarm, Timer Interrupt | 497-2822-5 | - | - | - | - | - | - | - | - | - | - | - | Obsolete | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | |
| 0 | Real Time Clock | No | Serial | 5.5 V | Reel | SO-28 | HH:MM:SS:hh | + 85 C | - | - | - | 20 B | - | - | - | - | - | - | - | - | - | 1000 | - | - | - | - | SMD/SMT | - | Clock, Calendar, Alarm, Timer Interrupt | - | - | - | - | - | - | - | - | - | - | - | - | Obsolete | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | |
Real Time Clock USE 511-M41T81M6E M41T81M6, Real Time Clock, Alarm, Calendar, Clock, Watchdog Timer, 20B RAM, I2C, 2 to 5.5V, 8-Pin SOIC M41T81MQ6 STMicroelectronics | 63 | 1: ¥121.788 | - | No | Serial | 5.5 V | Tube | SO-8 | HH:MM:SS:hh | + 85 C | Surface Mount | DW:DM:M:Y | - | 20 B | 20B | 2 V | 5.5 V | - | 8 | - | - | - | Serial-I2C | 100 | - | - | - | 3.9mm | SMD/SMT | - | Clock, Calendar, Alarm, Timer Interrupt | - | - | - | - | - | - | - | - | - | - | SOIC | - | Obsolete | 1.25mm | 4.9mm | 4.9 x 3.9 x 1.25mm | Alarm, Battery Backup, Calendar, Chip Deselect, Clock, Switch Over, Watchdog Timer | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - |
 Real Time Clock Serial 20Byte 18-Pin SOX T/R IC RTC SER W/ALARMS 18-SOIC Real Time Clock Serial Access Real Time Clock stmicroelectronics | 128 | 1: ¥79.56 | Real Time Clock | Lead free / RoHS Compliant | I²C, 2-Wire Serial | 3.3|5 V | Tape and Reel | 18SOX | HH:MM:SS:hh | -40 to 85 °C | Surface Mount | DW:DM:M:Y | Tape & Reel | 20 B | 20 byte | 2.7 | 5.5 | 2 V ~ 3.5 V | 18 | 18-SOX | Clock/Calendar | Alarm, Leap Year, Square Wave Output, Watchdog Timer | Serial (I2C) | 1000 | SOX | Compliant | Industrial | - | SMD/SMT | SOX | Clock/Calendar/Alarm/Timer/Interrupt | 497-6157-2 | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | Real Time Clocks | M41T81S | STMicroelectronics | Backup Switching | - | - | - | - | - | - | - |
Real Time Clock 2.0-5.5V 512 (64x8) Real Time Clock Serial 20Byte 8-Pin SO N Tube IC RTC SER ACCESS W/ALARM 8-SOIC IC, SERIAL RTC I2C, SMD, SO-8-8 IC RTC CLK/CALENDAR I2C 8-SOIC STMicroelectronics | 10 | 2000: ¥10.0758 | - | Lead free / RoHS Compliant | I²C, 2-Wire Serial | 2.7 V ~ 5.5 V | Tube | 8-SOIC (0.154", 3.90mm Width) | HH:MM:SS:hh | -40°C ~ 85°C | Surface Mount | DW:DM:M:Y | 100 | - | 20 | 2.7 | 5.5 | 2 V ~ 3.5 V | 8 | 8-SO | Clock/Calendar | Alarm, Leap Year, Square Wave Output, Watchdog Timer | Serial (I2C) | - | SOIC | Compliant | Industrial | 4(Max) | - | SO N | - | - | :No SVHC (20-Jun-2013) | 85423245 | 0.002 | Gull-wing | :8 | :- | 5(Max) | 1.65(Max) | 8 | - | :SMD | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | :1 | :41 | - | - | - | - | - | - | - | - | - | :32kHz | - | - | - | - | - | - |
Real Time Clock Serial 512 (64x8) Real Time Clock Serial 20Byte 8-Pin SO N Tube IC RTC SERIAL W/ALARM 8-SOIC M41T81M6E, Real Time Clock, Alarm, Calendar, Clock, Watchdog Timer, 20B RAM, I2C, 2 to 5.5V, 8-Pin SOIC Year STMicroelectronics | 10 | 2: ¥11.288 | - | Lead free / RoHS Compliant | I²C, 2-Wire Serial | 2 V ~ 5.5 V | Tube | 8-SOIC (0.154", 3.90mm Width) | HH:MM:SS:hh | -40°C ~ 85°C | Surface Mount | DW:DM:M:Y | 100 | :20 x 8 | 20B | 2 V | 5.5 V | 2.5 V ~ 3.5 V | 8 | 8-SO | Clock/Calendar | Alarm, Leap Year, Square Wave Output, Watchdog Timer | Serial (I2C) | - | SOIC | Compliant | Industrial | 3.9mm | - | SO N | - | - | :No SVHC (20-Jun-2013) | 85423190 | 0.000001 | Gull-wing | :8 | :- | 5(Max) | 1.65(Max) | 8 | SOIC | - | - | 1.25mm | 4.9mm | 4.9 x 3.9 x 1.25mm | Alarm, Battery Backup, Calendar, Chip Deselect, Clock, Switch Over, Watchdog Timer | - | - | - | - | - | - | - | - | - | - | :1 | :41 | No | Compliant | 85C | - | - | - | - | - | - | - | :41T81 | :10Yr | :NVRAM | - | - | - |
Real Time Clock Serial 20Byte 8-Pin SO N T/R IC RTC SERIAL W/ALARM 8SOIC Real Time Clock 2.0-5.5V 512 (64x8) IC, RTC, I2C, W/ ALARM, 8-SO IC RTC CLK/CALENDAR I2C 8-SOIC 实时时钟 (RTC), 日历功能, 20B RAM, I2C总线, 2.7 → 5.5 V电源, 8针 SOIC封装 stmicroelectronics | 5000 | 2500: ¥9.3908 | Real Time Clock | Lead free / RoHS Compliant | I²C, 2-Wire Serial | 3.3|5 V | Tape and Reel | 8SO N | HH:MM:SS:hh | -40 to 85 °C | Surface Mount | DW:DM:M:Y | Tape & Reel | 20 B | 20 byte | 2.7 | 2.7 V | 2 V ~ 3.5 V | 8 | 8-SO | RTC | Alarm, Leap Year, Square Wave Output, Watchdog Timer | Serial (I2C) | 2500 | SOIC | Compliant | Industrial | 4(Max) | SMD/SMT | SO N | Clock/Calendar/Alarm/Timer/Interrupt | 497-4684-2 | :No SVHC (20-Jun-2013) | 85423300 | 0.003 | Gull-wing | :8 | :MSL 1 - Unlimited | 5(Max) | 1.65(Max) | 8 | SO N | -40°C | - | - | - | - | - | 2500 | 2500 | NO | RoHS-conform | I2C | NO | 85°C | 2.7V | M41T81SM6F | 15 weeks | - | - | No | Compliant | 85C | - | - | - | - | - | - | - | - | - | - | - | - | - |
Real Time Clock Serial 20Byte 18-Pin SOX Tube IC RTC SER W/ALARMS 18-SOIC M41T81SMY6E, Real Time Clock, Alarm, Calendar, Clock, Watchdog Timer, 20B RAM, I2C, 2.7 to 5.5V, 18-Pin SOX RTC,M41T81SMY6E IC RTC CLK/CALENDAR I2C 18-SOIC STMicroelectronics | 10 | 1100: ¥17.7745 | - | Lead free / RoHS Compliant | I²C, 2-Wire Serial | 2.7 V ~ 5.5 V | Tube | 18-SOX, 18-SOIC with Crystal (7.5mm Width) | HH:MM:SS:hh | -40°C ~ 85°C | Surface Mount | DW:DM:M:Y | 44 | - | 20B | 2.7 V | 5.5 V | 2 V ~ 3.5 V | 18 | 18-SOX | Clock/Calendar | Alarm, Leap Year, Square Wave Output, Watchdog Timer | Serial (I2C) | - | SOX | Compliant | Industrial | 7.62mm | - | SOX | - | - | - | - | - | - | - | - | - | - | - | SOX | - | - | 2.34mm | 11.61mm | 11.61 x 7.62 x 2.34mm | Alarm, Battery Backup, Calendar, Chip Deselect, Clock, Switch Over, Watchdog Timer | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | I²C, 2-Wire Serial | Alarm, Leap Year, Square Wave Output, Watchdog Timer | YY-MM-DD-dd |
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