DS3234 Ultra-precision Real-time Clock Module(RTC)

DS3234 Ultra-precision Real-time Clock Module For MCU (ARDUINO  , PIC ,AVR )

At 0 ° C to + 40 ° C range, accuracy of ± 2ppm
At -40 ° C to + 85 ° C range, accuracy of ± 3.5ppm
Provide battery backup for uninterrupted time input
Operating Temperature Range
Industrial: -40 ° C to + 85 ° C
Commercial Grade: 0 ° C to + 70 ° C
Low power consumption
Real-time clock counts seconds, minutes, hours, day, date, month and 

year information has valid until 2099 Leap Year Compensation
Offers two regular alarm clock every day
Programmable square-wave output
4MHz SPI interface, support for modes 1 and 3
Digital Temperature Sensor Output: Accuracy of ± 3 ° C
Aging correction register
RST Input / Output
300mil, 20-pin SO package