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Maxim > Solutions > GPS Solutions
Real-Time Clocks (RTCs)
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| Display |
Title / Parts |
Key Advantages |
| QV PDF |
Extremely Accurate I²C RTC with Integrated Crystal and SRAM
DS3232
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| 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 |
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) |
Battery Voltage (V) |
Industry Qualified |
Package |
Operating Temp. Range (°C) |
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DS3234
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32.768kHz
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TCXO
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Digital
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CMOS Push-Pull
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2
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3.5
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1 (typ)
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5 (0-10 Years)
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2.7 to 5.5
3
3.3
5
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2.3 to 3.8
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Automotive - General
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SOIC/20
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-40 to +85
0 to +70
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DS3232
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32.768kHz
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TCXO
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Digital
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CMOS Push-Pull
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2
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3.5
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1 (typ)
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5 (0-10 Years)
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2.3 to 5.5
3
3.3
5
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2.3 to 5.5
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Automotive - General
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SOIC/20
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-40 to +85
0 to +70
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| 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 |
Features |
Industry Qualified |
Package |
Operating Temp. Range (°C) |
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DS3234
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HH:MM:SS
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YY-MM-DD
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SPI
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2.7 to 5.5
3
3.3
5
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1,500
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-
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NV SRAM
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256
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2
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| • | SOIC Package with Integrated Crystal |
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Automotive - General
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SOIC/20
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-40 to +85
0 to +70
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DS3232
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HH:MM:SS
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YY-MM-DD
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I2C
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2.3 to 5.5
3
3.3
5
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1,500
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-
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NV SRAM
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236
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2
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| • | SOIC Package with Integrated Crystal |
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Automotive - General
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SOIC/20
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-40 to +85
0 to +70
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DS1390
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HH:MM:SS:hh
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YY-MM-DD
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SPI
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1.8
3
3.3
5
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500
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6
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None
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-
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1
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-
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uSOP/10
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-40 to +85
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DS1391
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HH:MM:SS:hh
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YY-MM-DD
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SPI
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1.8
3
3.3
5
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500
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6
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None
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-
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1
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-
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uSOP/10
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-40 to +85
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DS1392
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HH:MM:SS:hh
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YY-MM-DD
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3-Wire
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1.8
3
3.3
5
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500
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6
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None
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-
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1
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-
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uSOP/10
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-40 to +85
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DS1393
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HH:MM:SS:hh
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YY-MM-DD
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3-Wire
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1.8
3
3.3
5
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500
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6
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None
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-
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1
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-
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uSOP/10
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-40 to +85
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DS1337
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HH:MM:SS
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YY-MM-DD
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I2C
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2
3
3.3
5
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425
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6
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None
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-
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2
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| • | SOIC Package with Integrated Crystal |
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-
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PDIP/8
SOIC/16
SOIC/8
uSOP/8
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-
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| See All Timekeeping & Real-Time Clocks (86) |
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