FEATURES:
 
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, ±3.5ppm from -40°C to +85°C
Active-Low RST output/Pushbutton reset debounce input
TTL level signal output indication
Two time-of-day alarms
Register for aging trim
Connect the microcontroller to achieve the touch switch function
Digital temperature sensor output: ±3°C accuracy
Programmable square-wave output signal
Highly accurate RTC completely manages all timekeeping functions
Surrounded by four fixed mounting holes
Standard 2.54mm pin for input and output connections
 
SPECIFICATIONS:
 
Operating Voltage: 3.3V - 5.5V DC
Clock Chip: High-precision DS3231
Memory Chip: AT24C32 with 32K storage capacity
Temperature Sensor Accuracy: ±3°C
Real-Time Clock: Tracks seconds, minutes, hours, day, date, month, year with leap-year compensation (valid until 2100)
Cascadable: Supports cascading with other IIC devices; 24C32 address modifiable via A0/A1/A2 shorting
Clock Accuracy: ±2ppm at 0-40°C (~1 minute error); includes two calendar alarms
IIC Bus Interface: Up to 400KHz transmission speed (5V working voltage)
Backup Power: Supports rechargeable CR2032 battery for power failure backup
Size: 38mm (L) x 22mm (W) x 14mm (H)
Weight: 8g
 
PACKAGING LIST:
 
1 x Clock Module RTC DS3231 12C
 
Pin-out:
 
SCL: I2C clock pin (10K pull-up to Vin).
SDA: I2C data pin (10K pull-up to Vin).
BAT: Battery positive pad for backup or powering components.
32K: 32KHz oscillator output (open drain, pull-up to read).
SQW: Square wave or interrupt output (open drain, pull-up to read).
RST: Reset pin (open drain, 50K internal pull-up, goes low on power loss). put in table