Overview

 


Suggested Components

 
Application Notes







System Clock



DATA SHEETS
Part Number Description Key Advantages
DS3231 Extremely Accurate I²C-Integrated RTC/TCXO/Crystal

DS3234 Extremely Accurate SPI Bus RTC with Integrated Crystal and SRAM

Completely Integrated, Accurate Timing Solution Provides Better than ±2.0 Minutes per Year Accuracy Over the Industrial Temperature Range and Requires No User Calibration
DS1340, DS1340C I²C RTC with Trickle Charger

I²C Real-Time Clock with Trickle Charger Offers Software Clock Calibration
DS32kHz 32.768kHz Temperature-Compensated Crystal Oscillator

Industry's Most Accurate Temperature-Compensated Crystal Oscillator (TCXO)



Key Specifications:

Oscillator Modules
Part Number Freq. Osc. Type Tuning Adjustment Type Freq. Output Type Frequency Stability
(±ppm/yr)
Frequency Stability
(±ppm/yr)
Frequency Stability
(±ppm/yr)
Frequency Stability
(±ppm)
VSUPPLY
(V)
0 to +40°C -40 to 0°C/ +40 to +85°C vs. VCC vs. Aging
DS3234  32.768kHz TCXO Digital CMOS Push-Pull 2 3.5 1 (typ) 5 (0-10 Years)
2.0 to 5.5
2.7 to 5.5
DS3231  Digital CMOS Open-Drain 3.5 1 (typ) 5 (0-10 Years) 2.3 to 5.5
DS32KHZ  - CMOS Push-Pull 7.5 2.5 (typ) 1 (First Year) 4.5 to 5.5
See All Oscillator Modules (25)

Timekeeping & Real-Time Clocks
Part Number Date/ Time Format Interface VSUPPLY
(V)
Time Keeping Current
(nA)
CL
(pF)
Memory Type Memory Size
(Bytes)
Time of Day Alarms Integrated XTAL
hh = sec/100 typ
DS3234  YY-MM-DD/ HH:MM:SS SPI
2.0 to 5.5
2.7 to 5.5
1500 - NV SRAM 256 2 Yes
DS3231  I2C 2.3 to 5.5 840 - None - 2 Yes
DS1340  I2C
1.8
3
3.3
5
800 12.5 None - 0 No
See All Timekeeping & Real-Time Clocks (86)





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