Description
The PT7C4363 serial real-time clock is a low-power clock/calendar with a programmable square-wave output.
   
Features
• Using external 32.768kHz quartz crystal
• Supports I2C-Buss high speed mode (400 kHz)
• Includes time (Hour/Minute/Second) and calendar
    (Year/Month/Date/Day) counter functions (BCD
    code)
• Programmable square wave output signal
• Oscillator stop flag
• Low backup current: typ. 500nA at VDD=3.0V and
    TA=25°C
• Operating range: 1.8V to 5.5V