■ GENERAL DESCRIPTION
The NJU6356 series is a serial I/O real time clock suitable for 4 bits microprocessor.
It contains quartz crystal oscillator, counter, shift register, voltage regulator, voltage detector and interface controller.
The NJU6356 series required only 4-port of microprocessor for data transfer, and the microprocessor can receive the data at any time when the microprocessor requires.
The operating voltage is as wide as 2.0V to 5.5V, consequently, the NJU6356 series can count accurate time data even if the back up period.
Furthermore, the long time back up is available as the operating current during the back up period is less than 3uA(TYP).

■ FEATURES
● Low Operating Voltage 2.0 to 3.6V
● Low Operating Current 3.0uA (TYP) @2.0V
                                         3.0uA (TYP) @3.0V
                                         4.0uA (TYP) @5.0V
● BCD Counts of Seconds, Minutes, Hours, Days of Week
                                                                       Day, Month and Year
● Required only 4-port     DATA, CLK, CE and I/O
● Low Battery Detector    Low Voltage Alarm Signal Output
● Automatic Leap Year Compensation           Up to AD 2099
● Package Outline             DIP8 / DMP8
● C-MOS Technology