PT7C43190

PT7C43190 ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||| Real-time Clock Module Features  Low current consumption: 0.3µA typ. (VDD=3.0V, TA = 25°C)  Wide operating voltage range: 1.35 to 5.5 V  Minimum time keeping operation voltage: 1.25 V  Built-in clock adjustment function  Built-in free user register  3-wire (micro wire) CPU interface  Built-in alarm interrupter  Built-in flag generator at power down or power on  Auto calendar up to the year 2099, automatic leap year calculation function  Built-in constant voltage circuit  Built-in 32 kHz crystal oscillator circuit  Package: SOIC-8L, TSSOP-8L, and TDFN2x3-8L Description The PT7C43190 is a CMOS 3-wire real-time clock IC, which operates with the very low current consumption and in the wide range of operation voltage. The operation voltage is 1.35 V to 5.5 V so that the RTC can be used for various power supplies from main supply to backup battery. In the system which operates with a backup battery, the included free registers can be used as the function for user’s backup memory. Users always can take back the information in the registers which is stored before power-off the main power supply, after the voltage is restored. The IC has t...