✍ RTC 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 improved 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 μP reset manually.

- - - - - - - - - -- - - - - - - - - - - - - - - - - - - -- - - - - - - - - - - - - - - - - - - - -

▼ Features:
Highly Accurate RTC Completely Manages All Timekeeping Functions
Real-Time Clock Counts Seconds, Minutes, Hours, Date of the Month, Month, Day of the Week, and Year, with Leap-Year Compensation Valid Up to 2100
Accuracy ±2ppm from 0°C to +40°C
Accuracy ±3.5ppm from -40°C to +85°C
Digital Temp Sensor Output: ±3°C Accuracy
Register for Aging Trim
Active-Low RST Output/Pushbutton Reset Debounce Input
Two Time-of-Day Alarms
Programmable Square-Wave Output Signal
With output TTL level signal indication
Can be connected directly to the microcontroller output IO port
Anti-interference ability
Connect the microcontroller to achieve the touch switch function
Standard 2.54mm pin to do input and output connections
Surrounded by four fixed mounting holes

===========================================

▼ Specification:
Clock chip: High-precision clock chip DS3231
Memory chips: AT24C32 (storage capacity 32K)
Operating voltage: 3.3 - 5.5V DC
Clock Accuracy: 0~40 range, the accuracy 2ppm, the error is about 1 minute

▖▖▖▖▖▖▖▖▖▖▖▖▖▖▖▖▖▖▖▖▖▖▖▖▖▖▖▖▖▖
???? Anything can ws us @ +6018 2870 232 ✅