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The 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, and maintains accurate timekeeping when main power to the device is interrupted. The integration of the crystal resonator enhances the long-term accuracy of the device as well as reduces the piece-part count in a manufacturing line. The DS3231 is available in commercial and industrial temperature ranges, and is offered in a 16-pin, 300-mil SO package.
The RTC maintains seconds, minutes, hours, day, date, month, and year information. The date at the end of the month is automatically adjusted for months with fewer than 31 days, including corrections for leap year. The clock operates in either the 24-hour or 12-hour format with an active-low AM/PM indicator. Two programmable time-of-day alarms and a programmable square-wave output are provided. 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, to provide a reset output, and to automatically switch to the backup supply when necessary. Additionally, the active-low RST pin is monitored as a pushbutton input for generating a µP reset.
Specifications:
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Size: 38mm * 22mm * 14mm
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Weight: 8g
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Operating voltage :3.3 - 5 .5 V
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Clock chip: high-precision clock chip DS3231
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Clock Accuracy :0-40 ℃ range, the accuracy 2ppm, the error was about 1 minute
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Calendar alarm clock with two
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Programmable square-wave output
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Real time clock generator seconds, minutes, hours, day, date, month and year timing and provide valid until the year 2100 leap year compensation
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Chip temperature sensor comes with an accuracy of 3 ℃
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Memory chips: AT24C32 (storage capacity 32K)
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IIC bus interface, the maximum transmission speed of 400KHz (working voltage of 5V)
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Can be cascaded with other IIC device, 24C32 addresses can be shorted A0/A1/A2 modify default address is 0x57
| Package Contents: |
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| 1 x DS3231 module |
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