Raspberry Pi RTC Expansion Module

The RTC module is specifically designed for Raspberry Pi. It communicated with Raspberry Pi through I2C bus. There is a Maxim DS1307 and CR1220 button cell on the board to keep the real time for a long time after the Raspberry Pi has its power down. Set a serial port, TTL convenient way online debugging.Features:Use Maxim DS1307 chipExtends CR1220 button cell backupCan be operated by a shellSet a serial port connectorProgrammable square-wave output signalConsumes Less than 500nA in Battery-Backup ModeAutomatic Power-Fail Detect and Switch CircuitryProgrammable Square-Wave Output SignalPort£ºRaspberry Pi B module 2X13 connection portRaspberry Pi A+/B+/2 module 2X13 connection port2*5pin 2.54mm connectorProduct Parameters£ºAccuracy ¡À2ppm from 0¡ãC to +40¡ãCWork voltage 5VBattery Backup Input for Continuous Time keepingReal-Time Clock Counts Seconds, Minutes,Hours, Day, Date, Month, and Year with Leap Year Compensation Valid Up to 2100Work temperature 0¡ãC to +70¡ãCPart List:1 x RTC Module1x CR1220 BatteryTechnical detailsDimensions 90mm x70mm x21mmWeight G.W 13gBattery Lithium Cells/Batteries packed with equipment UN3481 -PI966