Product Description
The PT7C4337 serial real-time clock is a low-power clock/calendar with two programmable time-of-day alarms and a programmable square-wave output.

Product Features
•  Using external 32.768kHz quartz crystal
•  Supports I2C-Bus's 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
•  Two Time-of-Day Alarms
•  Oscillator Stop Flag
•  Operating range: 1.8V to 5.5V