Analog Devices / Maxim Integrated DS1343小电流SPI/3线RTC
Maxim DS1343小电流SPI/3线实时时钟(RTC)是可与任何32.768kHz晶体兼容的计时设备。DS1343可驱动高阻值ESR，这样可使用最小的表面贴装晶体，节省电路板空间。Maxim DS1343 RTC还具有极低的待机电流，使备用电源具有更长的供电时间。时钟/日历提供秒、分、时、周、日、月和年信息。如果月份少于31天，时钟将在月底自动调整日期，包括闰年修正。时钟以24小时或12小时制运行，带一个低态有效AM/PM指示。通过一个SPI或3线接口串接传输地址和数据。提供两个可编程的当日时间报警。Maxim DS1343 RTC设计用于嵌入式时间戳、手持式设备、医疗设备和远程信息处理应用。
特性
- Low Timekeeping Current of 250nA (typ)
- Compatible with Crystal ESR Up to 100kΩ
- Versions Available to Support Either 6pF or 12.5pF Crystals
- RTC Counts Seconds, Minutes, Hours, Day, Date, Month, and Year with Leap Year Compensation Valid Through 2099
- Power-Fail and Switch Circuitry
- Three Operating Voltages
- 1.8V ±5%
- 3.0V ±10%
- 3.3V ±10%
- Trickle-Charge Capability
- Maintain Time Down to 1.15V (typ)
- Support Motorola SPI Modes 1 and 3, or Standard 3-Wire Interface
- Burst Mode for Reading/Writing Successive Addresses in Clock/RAM
- 96-Byte Battery-Backed NV RAM for Data Storage
- Two Time-of-Day Alarms with Two Interrupt Outputs
- Industrial Temperature Range
- 20-Pin TSSOP Packageor 14-Pin TDFN Package
应用
- Embedded Timestamping
- Handheld Devices
- Medical
- Telematics
Typical Operating Circuit
发布日期: 2011-07-13
| 更新日期: 2023-04-13