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Maxim > Solutions > Cardiac Monitor

Real-Time Clock (RTC)

DATA SHEETS
Display Title/Parts Key Advantages
QV  PDF I²C, 32-Bit, Binary Counter Clock with 64-Bit ID
DS1372

Ideal Clock for Portable Media Players
QV  PDF Accurate I²C RTC with Integrated TCXO/Crystal/FRAM
DS32B35, DS32C35

Nonvolatile Memory Has No Backup Supply and No Write Cycle Limits
QV  PDF I²C RTC with Trickle Charger
DS1340, DS1340C

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

RTC Provides System Flexibility with Multiple Programmable Features



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
DS32B35  32.768kHz TCXO Digital CMOS Open-Drain 2 3.5 1 (typ) 5 (0-10 Years)
2.7 to 3.63
3.3
DS32C35 
See All Oscillator Modules (28)

Key Specifications:  Timekeeping & Real-Time Clocks
Part Number Functions 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
DS32B35  - YY-MM-DD/ HH:MM:SS I2C
2.7 to 3.63
3.3
840 - FRAM
2K
8K
-
DS32C35  - YY-MM-DD/ HH:MM:SS
2.7 to 3.63
3.3
840 - FRAM
2K
8K
-
DS1340  - YY-MM-DD/ HH:MM:SS
1.8
3
3.3
5
800 12.5 None - 0
DS1372  Elapsed Time Counter Binary
3
3.3
5
400 12.5 None - 1
DS1339  - YY-MM-DD/ HH:MM:SS
2
3
3.3
5
400 6 None - 2
See All Timekeeping & Real-Time Clocks (80)



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