DS3231：超高精度、I²C接口、集成RTC/TCXO/晶体
DS3231是低成本、高精度I²C实时时钟(RTC)，具有集成的温补晶振(TCXO)和晶体。该器件包含电池输入端，断开主电源时仍可保持精确的计时。集成晶振提高了器件的长期精确度，并减少了生产线的元件数量。DS3231提供商用级和工业级温度范围，采用16引脚300mil的SO封装。 RTC保存秒、分、时、星期、日期、月和年信息。少于31天的月份，将自动调整月末的日期，包括闰年的修正。时钟的工作格式可以是24小时或带/AM/PM指示的12小时格式。提供两个可设置的日历闹钟和一个可设置的方波输出。地址与数据通过I²C双向总线串行传输。 精密的、经过温度补偿的电压基准和比较器电路用来监视VCC状态，检测电源故障，提供复位输出，并在必要时自动切换到备份电源。另外，/RST监视引脚可以作为产生µP复位的手动输入。
关键特性
| DS3231：典型工作电路 应用
|
数据手册DataSheet
| 语言 | 下载文件 | 备注 |
|---|---|---|
| 英文 | DS3231.pdf | Rev 10; 03/2015 |
| 中文 | DS3231_cn.pdf | Rev 8; 11/2010 *数据资料已更新，阅读最新版本，请下载英文版。 |
关键参数
| Part Number | Freq. | Osc. Type | Tuning Adjustment Type | Freq. Output Type | Frequency Stability (±ppm/yr) | Frequency Stability (±ppm/yr) | Frequency Stability (±ppm/yr) | Frequency Stability (±ppm) | VSUPPLY (V) | Package/Pins | Budgetary Price |
|---|---|---|---|---|---|---|---|---|---|---|---|
| 0 to +40°C | -40 to 0°C/ +40 to +85°C | vs. VCC | vs. Aging | See Notes | |||||||
| DS3231 | 32.768kHz | TCXO | Digital | CMOS Open-Drain | 2 | 3.5 | 1 (typ) | 5 (0-10 Years) | 2.3 to 5.5 | SOIC/16 | $3.85 @1k |
| Part Number | Interface | VSUPPLY (V) | Time Keeping Current (nA) | Memory Type | Time of Day Alarms | Integrated Resonator | Functions | Package/Pins | Budgetary Price |
|---|---|---|---|---|---|---|---|---|---|
| typ | See Notes | ||||||||
| DS3231 | I2C | 2.3 to 5.5 | 840 | None | 2 | XTAL | RTC | SOIC/16 | $3.85 @1k |
开发工具
技术资料
- Tips for Writing Bulletproof Real-Time Clock Control Code
- Industry Turns to MEMS for Accurate Real-Time Clocks
- Stuxnet and Other Things that Go Bump in the Night
- State Machine Logic in Binary-Coded Decimal (BCD)-Formatted Real-Time Clocks
- Implementing Flawless Designs with Accurate I²C Real-Time Clocks
- Selecting a Backup Source for Real-Time Clocks
- Design Considerations for Maxim Real-Time Clocks
- Crystal Considerations with Maxim Real-Time Clocks (RTCs)
质量和环境数据
订购型号
| 型号 | 状况 | 推荐替代产品 | 封装 | 温度 | RoHS/无铅 |
|---|---|---|---|---|---|
| DS3231S | 停止供货 | DS3231S# | SOIC,；16引脚；SOIC (；16引脚 | 0°C至+70°C | RoHS/无铅：否 |
| DS3231S# | 生产中 | SOIC,；16引脚；SOIC (；16引脚 | 0°C至+70°C | ||
| DS3231S#T&R | 生产中 | SOIC,；16引脚；SOIC (；16引脚 | 0°C至+70°C | ||
| DS3231S/T&R | 停止供货 | DS3231S#T&R | SOIC,；16引脚；SOIC；16引脚 | 0°C至+70°C | RoHS/无铅：否 |
| DS3231SN | 停止供货 | DS3231SN# | SOIC,；16引脚；SOIC (；16引脚 | -40°C至+85°C | RoHS/无铅：否 |
| DS3231SN# | 生产中 | SOIC,；16引脚；SOIC (；16引脚 | -40°C至+85°C | ||
| DS3231SN#T&R | 生产中 | SOIC,；16引脚；SOIC (；16引脚 | -40°C至+85°C | ||
| DS3231SN/T&R | 停止供货 | DS3231SN#T&R | SOIC,；16引脚；SOIC (；16引脚 | -40°C至+85°C | RoHS/无铅：否 |
- DS3231.pdf DS3231
- DS3231_cn.pdf DS3231
- DS3231.pdf DS3231
- DS3231.pdf DS3231
- Tips for Writing Bulletproof Real-Time Clock Control Code DS3234
- Industry Turns to MEMS for Accurate Real-Time Clocks DS3234
- Stuxnet and Other Things that Go Bump in the Night MAX2992
- State Machine Logic in Binary-Coded Decimal (BCD)-Formatted Real-Time Clocks DS3234
- Implementing Flawless Designs with Accurate I²C Real-Time Clocks DS3234
- Selecting a Backup Source for Real-Time Clocks DS3234
- Design Considerations for Maxim Real-Time Clocks DS3234
- Crystal Considerations with Maxim Real-Time Clocks (RTCs) DS3234
- DS3231.pdf DS3231
