# Raspberry Pi RTC Expansion Module v1.1 (Seeed Studio)

**Type:** Product page · **SKU:** SS114100001 · **Brand:** [Seeed Studio](https://core-electronics.com.au/brands/seeed-studio-australia)
**Page:** https://core-electronics.com.au/raspberry-pi-rtc-expansion-module-v1-1-seeed-studio.html ([markdown](https://core-electronics.com.au/raspberry-pi-rtc-expansion-module-v1-1-seeed-studio.html.md))

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...

## Pricing

- **Price:** $16.05 (inc GST) — $14.59 AUD, exc GST
- **Quantity discounts:** 10+ $14.01 (exc GST) · 25+ $13.57 (exc GST)

## Availability & dispatch

- Available with a lead time — expect dispatch between Sep 07 and Sep 07.

## Restrictions

Restrictions apply to this equipment as it uses button/coin cell batteries:

- The equipment is intended to be used in trades, professions or industries
- The equipment is not intended for sale to the general public
- The equipment is not intended to be used where children are present
- You are aware that this equipment may not meet child safety testing requirements as it is not intended to be used by consumers or general public, but rather, is intended to be used in trades, professions or industries in conjunction with the limitations and restrictions listed above
- You are aware that these restrictions are due to a change in [A](https://www.accc.gov.au/media-release/businesses-on-notice-as-mandatory-button-battery-laws-commence)[ustralian legislation in 2022](https://www.accc.gov.au/media-release/businesses-on-notice-as-mandatory-button-battery-laws-commence) for button/coin cell batteries
 
![Button Battery Warning](https://core-electronics.com.au/attachments/uploads/iec-button-battery.png)

A declaration of use will need to be submitted during checkout.

## 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 it's power off. In order to offering a convenient way to debug, there are five pin has been setup which are 5v, 3.3v, Rxd,Txd on borad.

**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
 
**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

## Images

- [Product image 1](https://core-electronics.com.au/media/catalog/product/i/m/imrp3bm3egcqrlpznf9t0cj6.jpg)