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Fermion: DS3231M MEMS Precise RTC (Breakout)

$6.90
SKU: DFR0641
Volume Discount
  • $6.70 3+ items
  • $6.50 5+ items
  • $6.30 10+ items
A MEMS RTC module using DS3231M chip for high-vibration environments, offering precise timing, programmable alarms, and compatibility with coin cell batteries.
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Introduction

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.

Selection Guide

RTC Module Selection Guide

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SKU
DFR0641
DFR0819
DFR0821
DFR0998
Storage
None
None
236Byte
70Byte
Integrated Resonator
MEMS
XTAL
XTAL
XTAL
Timing Current
2000nA
840nA
1500nA
1800nA
Timing Precision
±5ppm (±0.432s/d)
±3.5ppm (±0.3024s/d)
±3.5ppm (±0.3024s/d)
±3.8ppm (0.32832s/d) @ 25℃
Operating Voltage
3.3V-5.5V
3.3V-5.5V
3.3V-5.5V
3.3V
Operating Temperature
-45℃ to 85℃
-40℃ to 85℃
-40℃ to 85℃
-10℃ to 70℃
Introduction
A real-time clock (RTC) module with integrated MEMS resonator, reducing the risk of mechanical failure, suitable for scenarios with strong and frequent vibration.
A real-time clock (RTC) module with integrated crystal oscillator, featuring higher precision and lower power consumption, suitable for scenarios requiring high precision and low power.
A real-time clock (RTC) module with integrated crystal oscillator, featuring built-in 236Byte SRAM storage, capable of storing data with ultra-low power consumption, suitable for low-power loT applications requiring real-time clock.
A cost-effective RTC module with integrated crystal oscillator, featuring built-in 70Byte SRAM storage, capable of storing data with ultra-low power consumption, suitable for low-power loT applications requiring real-time clock.
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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

Documents

Shipping List

  • DS3231M MEMS Precise RTC x1
  • 2.54-7P Pin x1
  • Fermion: DS3231M MEMS Precise RTC (Breakout)
    $0.00