DS3231 AT24C32 IIC Precision Real Time Clock RTC Memory Module for Arduino

5 UNITS! – Real Time Clock RTC Module, DS3231

DS3231 is a low-cost, extremely
accurate I2C real-time clock (RTC), with an integrated temperature-compensated
crystal oscillator (TCXO) and crystal.

The device incorporates a battery
input, disconnect the main power supply, and maintains accurate
timekeeping.  

Integrated oscillator improves
long-term accuracy of the device and reduces the number of components of the
production line.    

The DS3231 is available in
commercial and industrial temperature ranges, using a 16-pin 300mil SO
package.           

RTC maintains seconds, minutes,
hours, day, date, month, and year information. Less than 31 days of the month,
the end date will be automatically adjusted, including corrections for leap
year.

The clock operates in either the
24 hours or band / AM / PM indication of the 12-hour format. Provides two
configurable alarm clock and a calendar can be set to a square wave output.

Address and data are transferred
serially through an I2C bidirectional bus.      

A precision
temperature-compensated voltage reference and comparator circuit monitors the
status of VCC to detect power failures, provide a reset output, and if
necessary, automatically switch to the backup power supply. 

In addition, / RST pin is
monitored as generating uP reset manually. Save time and high precision
addition, DS3231 also has some other features that extend the system host of
additional features and a range of options.

The device integrates a very
precise digital temperature sensor, through the I2C * interface to access it
(as the same time).

The temperature sensor accuracy is
+- 3 degrees C. On-chip power supply control circuit can automatically detect
and manage the main and standby power (i.e., low-voltage battery) to switch
between the power supply.  

If the main power failure, the
device can continue to provide accurate timing and temperature, performance is
not affected. When the main power re-power or voltage value returns to within
the allowable range, the on-chip reset function can be used to restart the
system microprocessor.

Specification                                  

– 
Size: 38mm (length) * 22mm (W) * 14mm (height)                                   

– Weight: 8g                                   

– Operating voltage :3.3 – 5 .5 V                              

– Clock chipset: high-precision
clock chip DS3231                                                                       

– Memory chips: AT24C32 (storage
capacity 32K)                                          

– IIC bus interface, the maximum
transmission speed of 400KHz (working voltage of 5V)                                

– Can be cascaded with other IIC
device                              

– 24C32 addresses can be shorted
A0/A1/A2 modify default address is 0x57                                          

– Packing: single anti-static packaging