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Maxim > Solutions > GPS Solutions

Real-Time Clocks (RTCs)

DATA SHEETS
Display Title/Parts Key Advantages
QV  PDF Extremely Accurate I²C RTC with Integrated Crystal and SRAM
DS3232

QV  PDF Low-Voltage SPI/3-Wire RTCs with Trickle Charger
DS1390, DS1391, DS1392, DS1393, DS1394

Low-Voltage SPI/3-Wire RTCs with Trickle Charger have the Broadest Feature Set and the Smallest Footprint in Their Class
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 Serial Real-Time Clock
DS1337, DS1337C

Industry's Smallest I²C RTC with Two Time-of-Day Alarms



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
DS3232 
2.3 to 5.5
3
3.3
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
DS1394  YY-MM-DD/ HH:MM:SS:hh SPI
3.3
5
500 6 None - 1
DS3234  YY-MM-DD/ HH:MM:SS SPI
2.7 to 5.5
3
3.3
5
1500 - NV SRAM 256 2
DS3232  YY-MM-DD/ HH:MM:SS I2C
2.3 to 5.5
3
3.3
5
1500 - NV SRAM 236 2
DS1390  YY-MM-DD/ HH:MM:SS:hh SPI
1.8
3
3.3
5
500 6 None - 1
DS1391  YY-MM-DD/ HH:MM:SS:hh SPI
1.8
3
3.3
5
500 6 None - 1
DS1392  YY-MM-DD/ HH:MM:SS:hh 3-Wire
1.8
3
3.3
5
500 6 None - 1
DS1393  YY-MM-DD/ HH:MM:SS:hh 3-Wire
1.8
3
3.3
5
500 6 None - 1
DS1337  YY-MM-DD/ HH:MM:SS I2C
2
3
3.3
5
425 6 None - 2
See All Timekeeping & Real-Time Clocks (80)



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