Fermion: DS3231 Precise RTC (Breakout)

SKU: DFR0819 Brand: DFRobot

This real-time clock module (RTC) uses the DS3231 chip that integrates a crystal resonator and a temperature compensator, which improves the long-term accuracy of...

$15.25 AUD, inc GST

$13.86 AUD, exc GST

In stock, ships same business day if ordered before 2PM
Delivered by Mon, 2nd of Dec

Quantity Discounts:

10-25 $13.45 (exc GST)
25+ $13.17 (exc GST)

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 ustralian legislation in 2022 for button/coin cell batteries

Button Battery Warning

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

This real-time clock module (RTC) uses the DS3231 chip that integrates a crystal resonator and a temperature compensator, which improves the long-term accuracy of the module. In the range of -40°C to +85°C, the accuracy of DS3231 remains at ±3.5ppm (±0.3024 seconds/day).

The device incorporates a battery input, and maintains high precision timing when main power to the device is interrupted. The RTC provides information of seconds, minutes, hours, week, day, month and year, and it can automatically adjust the date at the end of the month, including corrections for 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. In addition, the RST pin can be used as a push-button input for microprocessor reset.

NOTE: Due to the latest air cargo regulations, the transport audit of special items such as batteries, magnets and liquids will become very strict, so this RTC module does not come with batteries anymore, please buy them locally. The button cell battery model that goes with the module is CR1220.

Connection-Diagram

Board-Overview

DS323X Selection Guide

Product Name	Fermion: DS3231M MEMS Precise RTC Module	Fermion: DS3231 Precision RTC Module	Fermion: DS3232 Precision RTC Module
SKU	DFR0641	DFR0819	DFR0821
Storage	None	None	236Byte
Integrated Resonator	MEMS	XTAL	XTAL
Timing Current	2000nA	840nA	1500nA
Timing Precision	±5ppm (±0.432s/d)	±3.5ppm (±0.3024s/d)	±3.5ppm (±0.3024s/d)
Operating Voltage	3.3V-5.5V	3.3V-5.5V	3.3V-5.5V
Operating Temperature	-45°C ~ 85°C	-40°C ~ 85°C	-40°C ~ 85°C
	Integrated MEMS resonatr, reducing the risk of mechanical failure, suitable for use in strong and frequent vibration.	A RTC module with integrated crystal resonator, featuring a higher precision and a lower power consumption, suitable for use in the occasion in demand of high precision and low power.	A RTC module with integrated crystal resonator, equipped with 236Byte SRAM storage inside, enabling it to store data at an extremely low power consumption, suitable for low-power loT applications requiring real-time clock.

Features

Internal integrated crystal resonator, small deviation
Internal integrated temperature compensator, small temperature drift
Complete clock calendar function
Two programmable Time-of-Day alarms

Applications

Event reminder
MCU external wakeup source
Clock and alarm output

Specification

Power Supply Voltage: 3.3V-5.5V
I2C Address: 0x68
Timing Range: 1970 ~ 2100
Working Temperature: -40°C ~ +85°C
Timing Accuracy: ±3.5ppm (±0.3024 seconds/day)
Product Size: 22.5*21mm / 0.89*0.83 inch

Documents

Product wiki

Parts List

Fermion: DS3231 Precise RTC (Breakout) x1
2.54-7P Black Single Row Connector x1

Product Comments

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Products that weigh more than 0.5 KG may cost more than what's shown (for example, test equipment, machines, >500mL liquids, etc).

We deliver Australia-wide with these options (depends on the final destination - you can get a quote on the view cart page):

$3+ for Stamped Mail (typically 10+ business days, not tracked, only available on selected small items)
$7+ for Standard Post (typically 6+ business days, tracked)
$11+ for Express Post (typically 2+ business days, tracked)
Pickup - Free! Only available to customers who live in the Newcastle region (must order online and only pickup after we email to notify you the order is ready). Orders placed after 2PM may not be ready until the following business day.

Non-metro addresses in WA, NT, SA & TAS can take 2+ days in addition to the above information.

Some batteries (such as LiPo) can't be shipped by Air. During checkout, Express Post and International Methods will not be an option if you have that type of battery in your shopping cart.

International Orders - the following rates are for New Zealand and will vary for other countries:

$12+ for Pack and Track (3+ days, tracked)
$16+ for Express International (2-5 days, tracked)

If you order lots of gear, the postage amount will increase based on the weight of your order.

Our physical address (here's a PDF which includes other key business details):

Unit 18, 132 Garden Grove Parade
Adamstown
NSW, 2289
Australia

Take a look at our customer service page if you have other questions such as "do we do purchase orders" (yes!) or "are prices GST inclusive" (yes they are!). We're here to help - get in touch with us to talk shop.

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