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DS3231M MEMS Precise RTC

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DS3231M MEMS Precise RTC

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SKU: DFR0641 Brand: DFRobot

This precise RTC adopts DS3231M chip, which integrates MEMS resonator and temperature compensator. Compared to quartz crystal clock, the real-time clock reduces...

$11.30 AUD, inc GST

$10.27 AUD, exc GST

Available with a lead time
Expect dispatch between Dec 06 and Dec 10

Quantity Discounts:

10-25 $9.96 (exc GST)
25+ $9.76 (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 MEMS Precise RTC Breakout Board adopts DS3231M chip, which integrates MEMS resonator and temperature compensator. Compared to quartz crystal clock, the real-time clock reduces the risk of mechanical failure. Therefore, it can be used in a highly vibrating environment.Within -45°C to +85°C, the accuracy of the DS3231M is ±5ppm (±0.432 s/D).

The RTC based on MEMS has already passed both shock tests and vibration tests that certified by ACE-Q100. It can withstand 2900g mechanical shock (JESD22-B104C Condition-H) and 20g variable frequency vibration (JESD22-B103B Condition-1).

The DS3231M can be powered by a coin cell battery and can still maintain accurate timing even the mains are disconnected. RTC provides information about seconds, minutes, hours, days, months, and years. It can automatically adjust the end date of the month and the leap year correction. The clock format can be 24 hours or 12 hours with AM/PM indication. It provides two programmable calendar alarms and one 1Hz square wave output. In addition, the RST check pin can be used as a key input for microprocessor reset.

Note: According to the latest Air Transport Regulations, the batteries, magnets and liquids transport will be very stringent, so the cell battery CR1220 will not come with the module any more. Please buy it from the local supermarket.

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

High anti-vibration
Internal MEMS resonator and temperature compensator
High precision: ±5ppm (±0.432 s/D) at -45°C to +85°C
Clock calendar
2 programmable calendar alarms

Specification

Operating Voltage: 3.3V-5.5V
I2C Address: 0x68
Timing Range: 1970~2100 year
Operating Temperature: -40°C to +85°C
Timing Precision: ±5ppm (±0.432 s/D)
Dimension: 22.5*21mm / 0.886*0.827inch

Projects

Project 1: Making an Arduino OLED Ring Clock

The hardwares you need to do this project:

0.91”128x32 I2C OLED Displayx1

DS3231M MEMS Precise RTCx1

Beetlex1

3.7V Lithium Battery Charger x1

1000mah 3.7v Lithium Battery x1

Needle x1

A piece of elastic braid tape

Documents

Product wiki

Parts List

DS3231M MEMS Precise RTC x1

2.54-7P Pin x1

Product Comments

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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

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