DS3231S# by Analog Devices

Extremely Accurate I²C-Integrated RTC/TCXO/Crystal

Status: Active
Series: DS3231
RoHS: Unknown
Download Datasheet Visit Manufacturer Site View Pricing & Stock
The DS3231 is a low-cost, extremely accurate I²C real-time clock (RTC) with an integrated temperature-compensated crystal oscillator (TCXO) and crystal. The device incorporates a battery input, and maintains accurate timekeeping when main power to the device is interrupted. The integration of the crystal resonator enhances the long-term accuracy of the device as well as reduces the piece-part count in a manufacturing line. The DS3231 is available in commercial and industrial temperature ranges, and is offered in a 16-pin, 300-mil SO package. 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 for leap year. The clock operates in either the 24-hour or 12-hour format with an active-low AM/PM indicator. Two programmable time-of-day alarms and a programmable square-wave output are provided. Address and data are transferred serially through an I²C bidirectional bus. A precision temperature-compensated voltage reference and comparator circuit monitors the status of VCC to detect power failures, to provide a reset output, and to automatically switch to the backup supply when necessary. Additionally, the active-low RST pin is monitored as a pushbutton input for generating a µP reset.

Where to Buy

Prices starting from US$5.48

Distributor Stock
Logo for Farnell
Farnell
from US$6.79
578
in stock
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Logo for Newark Electronics
Newark Electronics
from US$7.50
617
in stock
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Logo for element14
element14
from US$7.06
578
in stock
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Logo for Chip One Stop
Chip One Stop
from US$5.48
38
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Features

Highly Accurate RTC Completely Manages All Timekeeping Functions Real-Time Clock Counts Seconds, Minutes, Hours, Date of the Month, Month, Day of the Week, and Year, with Leap-Year Compensation Valid Up to 2100 Accuracy ±2ppm from 0°C to +40°C Accuracy ±3.5ppm from -40°C to +85°C Digital Temp Sensor Output: ±3°C Accuracy Register for Aging Trim Active-Low RST Output/Pushbutton Reset Debounce Input Two Time-of-Day Alarms Programmable Square-Wave Output Signal
Real-Time Clock Counts Seconds, Minutes, Hours, Date of the Month, Month, Day of the Week, and Year, with Leap-Year Compensation Valid Up to 2100
Accuracy ±2ppm from 0°C to +40°C
Accuracy ±3.5ppm from -40°C to +85°C
Digital Temp Sensor Output: ±3°C Accuracy
Register for Aging Trim
Active-Low RST Output/Pushbutton Reset Debounce Input
Two Time-of-Day Alarms
Programmable Square-Wave Output Signal
Simple Serial Interface Connects to Most Microcontrollers Fast (400kHz) I2C Interface
Fast (400kHz) I2C Interface
Battery-Backup Input for Continuous Timekeeping Low Power Operation Extends Battery-Backup Run Time 3.3V Operation
Low Power Operation Extends Battery-Backup Run Time
3.3V Operation
Operating Temperature Ranges: Commercial (0°C to +70°C) and Industrial (-40°C to +85°C)
Underwriters Laboratories® (UL) Recognized

Specifications

Frequency 32.768kHz
Osc. Type TCXO
Tuning Adjustment Type Digital
Frequency Output Type CMOS Open-Drain
Frequency Stability (±ppm/yr) (0 to +40°C) 2
Frequency Stability (±ppm/yr) (-40 to 0°C/ +40 to +85°C) 3.5
Frequency Stability (±ppm/yr) (vs. VCC) 1 (typ)
Frequency Stability (±ppm) (vs. Aging) 5 (0-10 Years)
VSUPPLY (V) 2.3 to 5.5
Package/Pins SOIC (W)/16
BudgetaryPrice (See Notes) 4.71

DS3231S# Semiconductors - ICs by Analog Devices

RTC TCXO +/-2PPM I2C 16SOIC

Semiconductors - ICs
> Clock,Timing & Frequency Management
> Real Time Clocks
Status: Unknown
Series: -
RoHS: Unknown
Download Datasheet Visit Manufacturer Site View Pricing & Stock
The DS3231 is a low-cost, extremely accurate I2C real-time clock (RTC) with an integrated temperature- compensated crystal oscillator (TCXO) and crystal. The device incorporates a battery input, and maintains accurate timekeeping when main power to the device is interrupted. The integration of the crystal resonator enhances the long-term accuracy of the device as well as reduces the piece-part count in a manufacturing line. The DS3231 is available in commercial and industrial temperature ranges, and is offered in a 16-pin, 300-mil SO package. 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 for leap year. The clock operates in either the 24-hour or 12-hour format with an AM/PM indicator. Two programmable time-of-day alarms and a programmable square-wave output are provided. Address and data are transferred serially through an I2C bidirectional bus. A precision temperature-compensated voltage reference and comparator circuit monitors the status of VCC to detect power failures, to provide a reset output, and to automatically switch to the backup supply when necessary. Additionally, the RST pin is monitored as a pushbutton input for generating a μP reset.

Specifications

Date Format YY-MM-DD
Clock Format HH
Clock IC Type RTC
Supply Voltage Min 2.3V
Supply Voltage Max 5.5V
Clock IC Case Style WSOIC
No. of Pins 16Pins
IC Interface Type I2C
Operating Temperature Min 0°C
Operating Temperature Max 70°C
Product Range -
Automotive Qualification Standard -
RoHS Phthalates Compliant To Be Advised
MSL MSL 1 - Unlimited
SVHC No SVHC (15-Jan-2018)
Operating Temperature Range 0°C to +70°C
Supply Voltage Range 2.3V to 5.5V

Alternative Descriptions

Rtc, 0 To 70Deg C | Newark Electronics
RTC, TCXO, +/-2PPM, I2C, 16SOIC | element14

Frequently Asked Questions

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Is the DS3231S# RoHS compliant?

This part has not been flagged as RoHS Compliant.

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