# Raspberry Pi RTC Expansion Module (Seeed Studio)

**Type:** Product page · **SKU:** SS317990036 · **Brand:** [Seeed Studio](https://core-electronics.com.au/brands/seeed-studio-australia)
**Page:** https://core-electronics.com.au/raspberry-pi-rtc-expansion-module-seeed-studio.html ([markdown](https://core-electronics.com.au/raspberry-pi-rtc-expansion-module-seeed-studio.html.md))

## Retired product

This product is retired and no longer available for purchase. Search the catalogue for an alternative.

## Description

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 chip
- Extends CR1220 button cell backup
- Can be operated by a shell
- Set a serial port connector
- Programmable square-wave output signal
- Consumes Less than 500nA in Battery-Backup Mode
- Automatic Power-Fail Detect and Switch Circuitry
- Programmable Square-Wave Output Signal

 **Port：**- Raspberry Pi B module 2X13 connection port
- Raspberry Pi A+/B+/2 module 2X13 connection port
- 2\*5pin 2.54mm connector

 **Product Parameters：**- Accuracy ±2ppm from 0°C to +40°C
- Work voltage 5V
- Battery Backup Input for Continuous Time keeping
- Real-Time Clock Counts Seconds, Minutes,Hours, Day, Date, Month, and Year with Leap Year Compensation Valid Up to 2100
- Work temperature 0°C to +70°C

 **Part List:**- 1 x RTC Module
- 1x CR1220 Battery

## Images

- [Product image 1](https://core-electronics.com.au/media/catalog/product/3/1/317990036_201.jpg)