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Real-Time Clocks



DATA SHEETS
Part Number Description Key Advantages
DS1341, DS1342 Low-Current I²C RTCs for High-ESR Crystals

Compatible with High-ESR Crystals While Offering the Lowest Possible Current
DS1390, DS1391, DS1392,
...
Low-Voltage SPI/3-Wire RTCs with Trickle Charger

Low-Voltage SPI/3-Wire RTCs with Trickle Charger have the Broadest Feature Set and the Smallest Footprint in Their Class
DS1340, DS1340C I²C RTC with Trickle Charger

I²C Real-Time Clock with Trickle Charger Offers Software Clock Calibration
DS1339, DS1339C, DS1339U I²C Serial Real-Time Clock

RTC Provides System Flexibility with Multiple Programmable Features
DS1337, DS1337C I²C Serial Real-Time Clock

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



Key Specifications:

Timekeeping & Real-Time Clocks
Part Number Date/ Time Format Interface VSUPPLY
(V)
Time Keeping Current
(nA)
CL
(pF)
Memory Type Time of Day Alarms Integrated Resonator
hh = sec/100 typ
DS1341  YY-MM-DD/ HH:MM:SS I2C
1.8
5.5
220 6 None 2 -
DS1342  YY-MM-DD/ HH:MM:SS I2C
1.8
5.5
250 12.5 2 -
DS1394  YY-MM-DD/ HH:MM:SS:hh SPI
3.3
5
500 6 1 -
DS1390  YY-MM-DD/ HH:MM:SS:hh SPI
1.8
3
3.3
5
500 6 1 -
DS1391  YY-MM-DD/ HH:MM:SS:hh SPI
1.8
3
3.3
5
500 6 1 -
DS1392  YY-MM-DD/ HH:MM:SS:hh 3-Wire
1.8
3
3.3
5
500 6 1 -
DS1393  YY-MM-DD/ HH:MM:SS:hh 3-Wire
1.8
3
3.3
5
500 6 1 -
DS1340  YY-MM-DD/ HH:MM:SS I2C
1.8
3
3.3
5
800 12.5 0 -
DS1339  YY-MM-DD/ HH:MM:SS I2C
2
3
3.3
5
400 6 2 -
DS1337  YY-MM-DD/ HH:MM:SS I2C
2
3
3.3
5
425 6 2 -
DS1337C  YY-MM-DD/ HH:MM:SS I2C
2
3
3.3
5
425 6 2 XTAL
See All Timekeeping & Real-Time Clocks (87)





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