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2 X DS3231 AT24C32/IIC precision Real time clock RTC memory module For Arduino

Product Features:

- 100% Brand New
- 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 improve 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).
- This 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
- Clock Accuracy :0-40 Deg. Cel. range, the accuracy 2ppm, the error was about 1 minute

- Calendar alarm clock with two
- Programmable square-wave output
- 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
- SCL -> A5
- SDA -> A4
- VCC -> 5V
- GND -> GND

- with CR2032 battery

Package Included:
2 x Real Time Clock Module Memory Module(with CR2032 battery)