Key facts
- Brand
- Maxim
- Model
- DS3231
- Industry
- Industrial
- Documents
- 2
- Languages
- EN · JA
- Last added
- 2012-03-21
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MAXIM DS3231 Extremely Accurate I2C-Integrated RTC/TCXO/Crystal Manual
The DS3231 provides a highly accurate real‑time clock (RTC) with an integrated temperature‑compensated crystal oscillator (TCXO). It maintains seconds, minutes, hours, day, date, month and year, automatically adjusting for leap years and month length. The device operates over a wide temperature range and includes two programmable time‑of‑day alarms and a programmable square‑wave output.
The chip is supplied in a 16‑pin SO package, supports 3.3 V operation, and includes a push‑button reset pin, a low‑power standby mode, and a voltage‑reference/comparator that switches to backup battery power when VCC fails. Detailed electrical characteristics, pin functions, and timing diagrams are provided for designers.
Maxim DS3231 specifications
| Accuracy (Commercial Temp Range) | ±2 ppm (0 °C to +40 °C) |
|---|---|
| Accuracy (Industrial Temp Range) | ±3.5 ppm (‑40 °C to +85 °C) |
| Operating Temperature (Commercial) | 0 °C to +70 °C |
| Active Supply Current (VCC = 5.5 V) | 300 µA |
| Standby Supply Current (VCC = 5.5 V) | 170 µA |
| Number of Alarms | 2 programmable time‑of‑day alarms |
Source: MAXIM DS3231 Extremely Accurate I2C-Integrated RTC/TCXO/Crystal Manual
All Maxim DS3231 documents by type
Ratings, dimensions and ordering codes, for selection and design work.
Questions answered in these manuals
How many programmable alarms does the DS3231 provide?
It provides two programmable time‑of‑day alarms.
From: MAXIM DS3231 Extremely Accurate I2C-Integrated RTC/TCXO/Crystal Manual
What is the accuracy of the DS3231 in the industrial temperature range?
The accuracy is ±3.5 ppm from –40 °C to +85 °C.
From: MAXIM DS3231 Extremely Accurate I2C-Integrated RTC/TCXO/Crystal Manual
What is the allowed supply voltage range for the DS3231?
The DS3231 operates from 2.3 V to 5.5 V on the VCC pin.