2pcs DS3231 AT24C32 IIC Module Precision Clock

【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. 【High Performance】Integrated oscillator improve long-term accuracy of the device and reduce 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. 【Design compact】 Size: 38mm (length) * 22mm (W) * 14mm (height); Weight: 8g;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; 【COMPATABILITY】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); 【Easy Operation】 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 rechargeable battery CR2032, to ensure the system after power failure, the clock move any natural normal;Packing: single anti-static packaging.