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Maxim > Solutions > Printers and Faxes

Real-Time Clocks

DATA SHEETS
Display Title / Parts Key Advantages
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 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 RTC with Constant-Voltage Trickle Charger
DS12CR887, DS12R885, DS12R887
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
DS1337, DS1337C

Industry's Smallest I²C RTC with Two Time-of-Day Alarms
QV  PDF Portable System Controller
DS1677
QV  PDF Portable System Controller
DS1673
QV  PDF Portable System Controller
DS1670



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)
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  32.768kHz TCXO Digital CMOS Open-Drain 2 3.5 1 (typ) 5 (0-10 Years) 2.7 to 3.63
3.3
See All Oscillator Modules (26)

Key Specifications:   Timekeeping & Real-Time Clocks
Part Number Functions 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
DS32B35   -  HH:MM:SS YY-MM-DD I2C 2.7 to 3.63
3.3 		840  -  FRAM 2K
8K 		 - 
DS32C35   -  HH:MM:SS YY-MM-DD I2C 2.7 to 3.63
3.3 		840  -  FRAM 2K
8K 		 - 
DS1390   -  HH:MM:SS:hh YY-MM-DD SPI 1.8
3
3.3
5 		500 6 None  -  1
DS1391   -  HH:MM:SS:hh YY-MM-DD SPI 1.8
3
3.3
5 		500 6 None  -  1
DS1392   -  HH:MM:SS:hh YY-MM-DD 3-Wire 1.8
3
3.3
5 		500 6 None  -  1
DS1393   -  HH:MM:SS:hh YY-MM-DD 3-Wire 1.8
3
3.3
5 		500 6 None  -  1
DS12CR887   -  HH:MM:SS YY-MM-DD Multiplexed 3.3
5 		 -   -  NV SRAM 114 1
DS12R885   -  HH:MM:SS YY-MM-DD Multiplexed 3.3
5 		800 12.5 NV SRAM 114 1
DS12R887   -  HH:MM:SS YY-MM-DD Multiplexed 3.3
5 		 -   -  NV SRAM 114 1
DS1340   -  HH:MM:SS YY-MM-DD I2C 1.8
3
3.3
5 		800 12.5 None  -  0
DS1337   -  HH:MM:SS YY-MM-DD I2C 2
3
3.3
5 		425 6 None  -  2
DS1670 
•NV SRAM Control
•Watchdog Timekeeper
 HH:MM:SS YY-MM-DD 3-Wire 3.3 300 6 None  -  1
DS1673 
•NV SRAM Control
•Watchdog Timekeeper
 HH:MM:SS YY-MM-DD 3-Wire 3
5 		300 6 None  -  1
DS1677 
•NV SRAM Control
•Watchdog Timekeeper
 HH:MM:SS YY-MM-DD 3-Wire 5 300 6 None  -  1
See All Timekeeping & Real-Time Clocks (86)


         


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