DS3231 RTC Real Time Clock Module AT24C32 IIC I2C Precision

 

• Low-cost, extremely accurate I2C real-time clock (RTC),
  with an integrated temperature-compensated crystal oscillator (TCXO) and
  crystal.
• The device incorporates a battery (BATTERY NOT INCLUDED) 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.
• DS3231 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.
• 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. 
• /RST pin is monitored as generating μP 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).
• Temperature sensor accuracy is ± 3 ° C. On-chip
  power supply control circuit can automatically detect and manage the main and
  standby power i.e., low-voltage battery (BATTERY NOT INCLUDED) 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.
• Module Uses a LIR2032 Lithuim-ion Battery (BATTERY NOT INCLUDED).

Module parameters:

• Size: 38mm (length) * 22mm (W) * 14mm (height)
• Operating voltage :3.3 – 5 .5 V
• clock chip: high-precision clock chip DS3231
• Clock Accuracy :0-40 ℃ range, the accuracy 2ppm,
  the error was about 1 minute
• Calendar alarm clock with two
• Programmable square-wave output
• Real time clock generator seconds, minutes, hours,
  day, date, month and year timing and provide valid until the year 2100 leap year
  compensation
• Chip temperature sensor comes with an accuracy of
  ± 3 ℃
• 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
• With a battery (Battery not included), to ensure the
  system after power failure, the clock move any natural normal
• Wiring instructions (with Arduino uno r3 for
  example):
  SCL → A5
  SDA → A4
  VCC → 5V
  GND → GND

Important
Note Before you decide to Buy: This Module is provided with NO
instructions or data sheets. We are unable to provide any technical
support, it is therefore essential that you have the resources available
to make use of the modules and how they operate within their electrical
specifications.

We check and test each module, we are therefore unable
to accept any returns based on a faulty module.