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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 Frequency Oscillator Type Tuning Adjustment Type Frequency Output Type Freq. Stability vs. Temp. @0 to +40°C (±ppm) Freq. Stab. vs.Temp. @-40 to 0/ +40 to 85°C (±ppm) Frequency Stability vs. Supply Voltage (±ppm/V) Frequency Stability vs. Aging (±ppm) Supply Voltage (V)
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  32.768kHz TCXO Digital CMOS Open-Drain 2 3.5 1 (typ) 5 (0-10 Years) 2.3 to 5.5
3
3.3
5
DS32KHZ  32.768kHz TCXO  -  CMOS Push-Pull 2 7.5 2.5 (typ) 1 (First Year) 4.5 to 5.5
See All Oscillator Modules (26)

Key Specifications:   Timekeeping & Real-Time Clocks
Part Number Time Format (hh = sec/100) Date Format Interface Supply Voltage (V) Time- keeping Current (typ) (nA) CL, Load Capacitance (pF) Memory Type Memory Size (Bytes) Number of Time of Day Alarms
DS3234  HH:MM:SS YY-MM-DD SPI 2.7 to 5.5
3
3.3
5
1,500  -  NV SRAM 256 2
DS3231  HH:MM:SS YY-MM-DD I2C 2.3 to 5.5
3
3.3
5
840  -  None  -  2
DS1340  HH:MM:SS YY-MM-DD I2C 1.8
3
3.3
5
800 12.5 None  -  0
See All Timekeeping & Real-Time Clocks (86)




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