Overview
This module is an I2C bus interface-compliant real-time clock which includes a 32.768-kHz quartz oscillator that has been adjusted for high precision. In addition to providing a function for generating six types of interrupts, a dual alarm function, an oscillation stop detection function (used to determine presence of valid internal data at power-on), and a power supply voltage monitoring function, this module includes a digital clock precision adjustment function that can be used to set various levels of precision. Since the internal oscillation circuit is driven at a constant voltage, 32.768-kHz clock output is stable and free of voltage fluctuation effects. This implementation of multiple functions in one SMT package is ideal for applications ranging from cellular phones to PDAs and other small electronic devices.

FEATURES
‧ Built-in 32.768kHz crystal unit : Frequency adjusted for high accuracy (±5×10-6 / Ta=+25°C)
‧ Interface Type : I2C-Bus Interface (400kHz)
‧ Operating voltage range : 1.70V to 5.5V
‧ Wide voltage for timekeeping : 1.15V to 5.5V
‧ Various detection Functions : Ex. Oscillation stop detection function
‧ Low backup current : 0.48μA / 3V(Typ.)
‧ 32.768kHz frequency output function : C-MOS output with OE pin
‧ The various functions include full calendar,Dual alarm, Periodic interruption