NJU6350

NJU6350 SERIAL I/O REAL TIME CLOCK s GENERAL DESCRIPTION The NJU6350 is a serial I/O Real Time Clock suitable for 4 bits micro-processor. It contains quartz crystal oscillator, counter, shift register, voltage regulator, voltage detector, and interface controller. The NJU6350 required only 3-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 NJU6350 can count accurate time data even if the back up period. Furthermore, the long time back up is available as the current consumption during the back up period is less than 2µA. NJU6350R NJU6350C s PACKAGE OUTLINE s FEATURES q Operating Voltage : 3.0V ± 20% 2.0V to 5.5V ( The clock operation ) q Low operating current : 0.8 µA ( Typ. ) at 2.0V 2.0 µA ( Max. ) at 2.0V q BCD Counts of Seconds, Minutes, Hours, Days of Week, Date, Month and Year q q q q q Required only 3-port ( DATA, CLK and CE ) Low Battery Detector ( Low voltage alarm signal output ) Automatic Leap Year Compensation : Up to AD 2099 Package Outline C-MOS Technology : VSP 8 / Chip s PIN CONFIGURATION FOUT 1 XT XT 2 3 8 XDD 7 DATA 6 CLK 5 CE VSS 4 NJU6350 s BLOCK DIAGRAM Fout XT XT V SS V DD Low Voltage Detector Controller Oscillator Divider Timer Counter hour day date sec. min. month year DATA CLK CE s TERMINAL DESCRIPTION No. 1 SYMBOL Fout I/O O 2 3 4 5 XT XT VSS CE I O Power I FUNCTION Oscillator outp...