Maxim Integrated DS1308 低功耗 I虏C RTC
Maxim Integrated DS1308串行实时时钟(RTC)是一款低功耗、二-十进制编码(BCD)的时钟/日历，外加56字节NV RAM。地址与数据通过I²C接口串行传输。时钟/日历提供秒、分、时、星期、日、月和年信息。对于少于31天的月份，将自动调整月末日期，包括闰年修正。时钟格式可以是24小时或带AM/PM指示的12小时格式。Maxim Integrated DS1308 RTC内置电源检测电路，检测主电源失效时自动切换到备用电源，以保持时间、日期信息和计时。
应用
- Consumer Electronics
- Set-Top Box
- Digital Recording
- Network Appliance
- Handhelds
- GPS
- POS Terminal
- Medical
- Glucometer
- Medicine Dispenser
- Office Equipment
- Fax/Printer
- Copier
- Other
- Utility Meter
- Vending Machine
- Thermostat
- Modem
- Telecommunications
- Router
- Switcher
- Server
特性
- Low timekeeping current of 250nA (typ)
- Compatible with crystal ESR up to 100kΩ
- RTC counts seconds, minutes, hours, date, month, day of the week, and year with leap-year compensation up to 2400
- 56-byte, battery-backed, general-purpose RAM with unlimited writes
- I²C serial interface
- External clock source for synchronization clock reference
- Programmable square-wave output signal
- Automatic power-fail detect and switch circuitry
- -40°C to +85°C operating temperature range
- UL recognized