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Maxim > Solutions > Set-Top Boxes

System Clock

DATA SHEETS
Display Title/Parts Key Advantages
QV  PDF Extremely Accurate I²C-Integrated RTC/TCXO/Crystal
DS3231

QV  PDF Extremely Accurate SPI Bus RTC with Integrated Crystal and SRAM
DS3234

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

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

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)
2.7 to 5.5
3
3.3
5
DS3231  Digital CMOS Open-Drain 3.5 1 (typ) 5 (0-10 Years)
2.3 to 5.5
3
3.3
5
DS32KHZ  - CMOS Push-Pull 7.5 2.5 (typ) 1 (First Year) 4.5 to 5.5
See All Oscillator Modules (28)

Key Specifications:  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
hh = sec/100 typ
DS3234  YY-MM-DD/ HH:MM:SS SPI
2.7 to 5.5
3
3.3
5
1500 - NV SRAM 256 2
DS3231  I2C
2.3 to 5.5
3
3.3
5
840 - None - 2
DS1340  I2C
1.8
3
3.3
5
800 12.5 None - 0
See All Timekeeping & Real-Time Clocks (80)



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