SEEED STUDIO Real Time Clock Module for Raspberry Pi, DS1307

The SEEED STUDIO RTC Expansion Module is a real-time clock (RTC) add-on board designed for the Raspberry Pi. Using the Analog Devices DS1307 chip, it provides accurate timekeeping even when the Raspberry Pi is powered off, thanks to the onboard CR1220 button cell backup.

The module communicates with the Raspberry Pi via the I2C bus and includes a 5-pin header with connections for 5V, 3.3V, RxD, and TxD for convenient debugging and serial communication. It counts seconds, minutes, hours, day, date, month, and year, including leap years, and maintains accuracy of ±2ppm from 0°C to +40°C.

Key Features

• Uses Analog Devices DS1307 chip
• Extends CR1220 button cell backup
• Can be operated by a shell
• Set a serial port connector and accuracy ±2ppm from 0°C to +40°C
• Programmable square-wave output signal
• Work voltage 5V
• Consumes less than 500nA in battery-backup mode
• Automatic power-fail detect and switch circuitry
• Battery back-up input for continuous time keeping and compensation valid up to 2100
• Work temperature 0°C to +70°C

The module's low power consumption (less than 500nA in battery-backup mode) ensures long battery life, and the automatic power-fail detect circuitry seamlessly switches to battery backup when main power is lost.

Specifications

• Silicon Manufacturer: Analog Devices
• Silicon Core Number: DS1307
• For Use With: Raspberry Pi
• Clock IC Type: RTC
• Supply Voltage Max: 5V
• No. of Pins: 5
• IC Interface Type: I2C
• Kit Contents: RTC Expansion Module DS1307
• Operating Temperature Min: 0°C
• Operating Temperature Max: 70°C
• Weight: 9 g
• Dimensions (H × W × D): 36.5 × 26 × 13.5 mm

This RTC module is an ideal solution for Raspberry Pi projects requiring accurate timekeeping, such as **