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Real-Time Clocks (RTCs)
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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
Frequency Stability
Frequency Stability
Frequency Stability
VSUPPLY
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)
DS3232
See All Oscillator Modules (28)
Key Specifications: Timekeeping & Real-Time Clocks
Part Number
Date/ Time Format
Interface
VSUPPLY
Time Keeping Current
CL
Memory Type
Memory Size
Time of Day Alarms
hh = sec/100
typ
DS1394 YY-MM-DD/ HH:MM:SS:hh
SPI
500
6
None
-
1
DS3234 YY-MM-DD/ HH:MM:SS
SPI
1500
-
NV SRAM
256
2
DS3232 YY-MM-DD/ HH:MM:SS
I2 C
1500
-
NV SRAM
236
2
DS1390 YY-MM-DD/ HH:MM:SS:hh
SPI
500
6
None
-
1
DS1391 YY-MM-DD/ HH:MM:SS:hh
SPI
500
6
None
-
1
DS1392 YY-MM-DD/ HH:MM:SS:hh
3-Wire
500
6
None
-
1
DS1393 YY-MM-DD/ HH:MM:SS:hh
3-Wire
500
6
None
-
1
DS1337 YY-MM-DD/ HH:MM:SS
I2 C
425
6
None
-
2
See All Timekeeping & Real-Time Clocks (80)
