Analog Devices / Maxim Integrated DS1343低電流SPI/3線RTC
Maxim DS1343低電流SPI/3-wire實時時鐘(RTC)是與任何32.768 kHz晶體相容的計時設備。DS1343能驅動高ESR，因而能使用最少可用表面封裝晶體，從而節省電路板空間。Maxim DS1343 RTC同時提供極低備用電流，使從後備電源得到較長壽命。時鐘/日曆提供年、月、日、時、分、秒資訊。月份最後一天於少於31天的月份自動調節，包括閏年日修正。時鐘使用24小時或12小時制式，具有低電平有效AM/PM指示燈。地址及資料透過SPI或3電線端口串列傳輸。備有兩個可編程日曆時鐘。Maxim DS1343 RTCs設計專為內崁時間郵戳、手提設備、醫療設備及遠程通信應用。
特點
- 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
應用
- Embedded Timestamping
- Handheld Devices
- Medical
- Telematics
Typical Operating Circuit
發佈日期: 2011-07-13
| 更新日期: 2023-04-13