FEATURES:
 
This Arduino Tiny RTC I2C module uses a tiny coin-cell to maintain precise time for years, and it's incredibly easy to connect to your Arduino project. It includes the DS1307 I2C real time clock IC and the 24C32 32K I2C EEPROM storage.
 
SPECIFICATIONS:
 
Backup by AT24C32 32Kbit
Accuracy: ±0.5°C from -10°C to +85°C
I2C interface
Weight: 6.3g
Input voltage: DC 3.0 - 5.5V
Dimension: 28x25x8.4mm
Temperature range: -55°C to +125°C
DS1307-based RTC with CR2032 battery (non-rechargeable battery included)
DS1307, AT24C32 can work singularly
 
Arduino Tiny RTC I2C Real Time Clock Pinout
PIN
Description
Comment
SDA
I2C data
I2C data for the RTC
VCC
5V supply
Power the module and charge
GND
Ground
Ground
BAT
Battery voltage
To monitor the battery voltage, or not connected
DS
DS18B20 Temp. Sensor output
One wire interface
SCL
I2C clock
I2C clock for the RTC
SQ
Square wave output
Normally not used
 
 
PACKAGING LIST:
 
1 x Real Time Clock 12C Module RTC DS1307 w/Battery