# DeadOn RTC - DS3234 Breakout

**Type:** Product page · **SKU:** BOB-10160 · **Brand:** [Sparkfun](https://core-electronics.com.au/brands/sparkfun-australia)
**Page:** https://core-electronics.com.au/deadon-rtc-ds3234-breakout.html ([markdown](https://core-electronics.com.au/deadon-rtc-ds3234-breakout.html.md))

Here is a real time clock based on the DS3234 Real Time Clock IC. The DS3234 is a low-cost, extremely accurate SPI bus real-time clock with an integrated temperature-compensated crystal oscillator and crystal.

## Pricing

- **Price:** $45.20 (inc GST) — $41.09 AUD, exc GST
- **Quantity discounts:** 5+ $39.85 (exc GST) · 25+ $39.04 (exc GST) · 100+ $37.39 (exc GST)

## Availability & dispatch

- Available with a lead time — expect dispatch between Aug 17 and Aug 24.

## 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

Here is a real time clock based on the DS3234 Real Time Clock IC. The DS3234 is a low-cost, extremely accurate SPI bus real-time clock with an integrated temperature-compensated crystal oscillator and crystal.

The RTC maintains seconds, minutes, hours, day, date, month, and year information. The date at the end of the month is automatically adjusted for months with fewer than 31 days, including corrections of leap year. The clock operates in either the 24-hour or 12-hour format with AM/PM indicator. Two programmable time-of-day alarms and a programmable square-wave output are provided.

The underside of the board holds a [12mm coin-cell battery](https://core-electronics.com.au/coin-cell-battery-12mm-cr1225-sf.html) holder for battery backup.

**Note:** These do not include a battery.

**Features:**

- +-2ppm accuracy
- Two alarms
- SPI output
- Low power consumption
- Accurate calendar up to year 2100
- Battery backup included
 
**Documents:**

- Schematic
- Eagle Files
- Datasheet (DS3234)
- Example Sketch
- [Github](https://github.com/sparkfun/DeadOn_RTC/tree/v1.1)

## Images

- [Product image 1](https://core-electronics.com.au/media/catalog/product/d/e/deadon_rtc_-_ds3234_breakout__bob-10160__01.jpg)