Part Number Manufacturer / Brand Brife Description Part StatusTypeFeaturesMemory SizeTime FormatDate FormatInterfaceVoltage - SupplyVoltage - Supply, BatteryCurrent - Timekeeping (Max)Operating TemperatureMounting TypePackage / CaseSupplier Device Package
STMicroelectronics IC RTC CLOCK/CALENDAR I2C 16-QFN ActiveClock/CalendarAlarm, Leap Year, Square Wave Output, Watchdog Timer
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HH:MM:SS:hh (24 hr)YY-MM-DD-ddI²C, 2-Wire Serial1.3 V ~ 4.4 V
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0.7µA ~ 0.95µA @ 1.3V ~ 4.4V-40°C ~ 85°CSurface Mount16-VFQFN Exposed Pad16-QFN (3x3)
STMicroelectronics IC RTC CLOCK/CALENDAR I2C 16-QFN ActiveClock/CalendarAlarm, Leap Year, Watchdog Timer
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HH:MM:SS:hh (24 hr)YY-MM-DD-ddI²C, 2-Wire Serial1.3 V ~ 4.4 V
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0.7µA ~ 0.95µA @ 1.3V ~ 4.4V-40°C ~ 85°CSurface Mount16-VFQFN Exposed Pad16-QFN (3x3)
STMicroelectronics IC RTC CLOCK/CALENDAR I2C 8-SOIC ActiveClock/Calendar
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HH:MM:SSYY-MM-DD-ddI²C, 2-Wire Serial2 V ~ 5.5 V
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1.2µA ~ 31µA @ 3V ~ 5.5V-40°C ~ 85°CSurface Mount8-SOIC (0.154", 3.90mm Width)8-SO
STMicroelectronics IC RTC CLOCK/CALENDAR I2C 8-SOIC ActiveClock/CalendarAlarm, Leap Year, Square Wave Output
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HH:MM:SS:hh (24 hr)YY-MM-DD-ddI²C, 2-Wire Serial2 V ~ 5.5 V
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2.4µA ~ 31µA @ 2V ~ 5.5V-40°C ~ 85°CSurface Mount8-SOIC (0.154", 3.90mm Width)8-SO
STMicroelectronics IC RTC CLOCK/CALENDAR I2C 8-SOIC ActiveClock/CalendarAlarm, Leap Year, SRAM, Watchdog Timer7BHH:MM:SS:hh (24 hr)YY-MM-DD-ddI²C, 2-Wire Serial2.7 V ~ 5.5 V2 V ~ 5.5 V10µA @ 5.5V-40°C ~ 85°CSurface Mount8-SOIC (0.154", 3.90mm Width)8-SO
STMicroelectronics IC RTC CLOCK/CALENDAR I2C 8-SOIC ActiveClock/CalendarAlarm, Leap Year, SRAM, Watchdog Timer7BHH:MM:SS:hh (24 hr)YY-MM-DD-ddI²C, 2-Wire Serial3 V ~ 5.5 V2 V ~ 5.5 V10µA @ 5.5V-40°C ~ 85°CSurface Mount8-SOIC (0.154", 3.90mm Width)8-SO
STMicroelectronics IC RTC CLOCK/CALENDAR I2C 8-SOIC ActiveClock/CalendarAlarm, Leap Year, SRAM, Watchdog Timer7BHH:MM:SS:hh (24 hr)YY-MM-DD-ddI²C, 2-Wire Serial2.38 V ~ 5.5 V2 V ~ 5.5 V10µA @ 5.5V-40°C ~ 85°CSurface Mount8-SOIC (0.154", 3.90mm Width)8-SO
STMicroelectronics IC RTC CLOCK/CALENDAR I2C 8-SOIC ActiveClock/CalendarAlarm, Leap Year, Square Wave Output, Watchdog Timer
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HH:MM:SS:hh (24 hr)YY-MM-DD-ddI²C, 2-Wire Serial2.7 V ~ 5.5 V2 V ~ 3.5 V100µA @ 2.7V ~ 5.5V-40°C ~ 85°CSurface Mount8-SOIC (0.154", 3.90mm Width)8-SO
STMicroelectronics IC RTC CLOCK/CALENDAR I2C 8-SOIC ActiveClock/CalendarLeap Year, NVSRAM56BHH:MM:SS (24 hr)YY-MM-DD-ddI²C, 2-Wire Serial4.5 V ~ 5.5 V2.5 V ~ 3.5 V100µA (Typ) @ 4.5V ~ 5.5V-40°C ~ 85°CSurface Mount8-SOIC (0.154", 3.90mm Width)8-SO
STMicroelectronics IC RTC CLOCK/CALENDAR I2C 16-QFN ActiveClock/CalendarAlarm, Leap Year, Square Wave Output, SRAM, Watchdog Timer7BHH:MM:SS:hh (24 hr)YY-MM-DD-ddI²C, 2-Wire Serial3 V ~ 5.5 V2 V ~ 5.5 V10µA @ 5.5V-40°C ~ 85°CSurface Mount16-VQFN Exposed Pad16-QFN (4x4)
STMicroelectronics IC RTC CLOCK/CALENDAR I2C 8-SOIC ActiveClock/CalendarLeap Year, NVSRAM56BHH:MM:SSYY-MM-DD-ddI²C, 2-Wire Serial2 V ~ 5.5 V2.5 V ~ 3.5 V70µA @ 2V ~ 5.5V-40°C ~ 85°CSurface Mount8-SOIC (0.154", 3.90mm Width)8-SO
STMicroelectronics IC RTC CLOCK/CALENDAR SPI 16-SOIC ActiveClock/CalendarAlarm, Leap Year, NVRAM, Square Wave Output, Watchdog Timer44BHH:MM:SS:hh (24 hr)YY-MM-DD-ddSPI2.7 V ~ 5.5 V2.5 V ~ 3.5 V1.4mA @ 2.7V ~ 5.5V-40°C ~ 85°CSurface Mount16-SOIC (0.154", 3.90mm Width)16-SO
STMicroelectronics IC RTC CLOCK/CALENDAR I2C 8LCC ActiveClock/CalendarAlarm, Leap Year, Square Wave Output, Watchdog Timer
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HH:MM:SS:hh (24 hr)YY-MM-DD-ddI²C, 2-Wire Serial1.3 V ~ 4.4 V
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0.7µA ~ 0.95µA @ 1.3V ~ 4.4V-40°C ~ 85°CSurface Mount8-LCC8-LCC (1.5x3.2)
STMicroelectronics IC RTC CLOCK/CALENDAR I2C 18-SOX ActiveClock/CalendarAlarm, Leap Year, Square Wave Output, SRAM, Watchdog Timer7BHH:MM:SS:hh (24 hr)YY-MM-DD-ddI²C, 2-Wire Serial3 V ~ 5.5 V2 V ~ 5.5 V10µA @ 5.5V-40°C ~ 85°CSurface Mount18-SOX, 18-SOIC with Crystal (7.5mm Width)18-SOX
STMicroelectronics IC RTC CLOCK/CALENDAR I2C 18-SOX ActiveClock/CalendarAlarm, Leap Year, Square Wave Output, SRAM, Watchdog Timer7BHH:MM:SS:hh (24 hr)YY-MM-DD-ddI²C, 2-Wire Serial2.7 V ~ 5.5 V2 V ~ 5.5 V10µA @ 5.5V-40°C ~ 85°CSurface Mount18-SOX, 18-SOIC with Crystal (7.5mm Width)18-SOX
STMicroelectronics IC RTC CLOCK/CALENDAR I2C 18-SOX ActiveClock/CalendarAlarm, Leap Year, Square Wave Output, SRAM, Watchdog Timer7BHH:MM:SS:hh (24 hr)YY-MM-DD-ddI²C, 2-Wire Serial2.38 V ~ 5.5 V2 V ~ 5.5 V10µA @ 5.5V-40°C ~ 85°CSurface Mount18-SOX, 18-SOIC with Crystal (7.5mm Width)18-SOX
STMicroelectronics IC RTC CLOCK/CALENDAR SPI 18-SOX ActiveClock/CalendarAlarm, Leap Year, Square Wave Output, SRAM, Watchdog Timer7BHH:MM:SS:hh (24 hr)YY-MM-DD-ddSPI2.7 V ~ 5.5 V1.8 V ~ 5.5 V10µA @ 5.5V-40°C ~ 85°CSurface Mount18-SOX, 18-SOIC with Crystal (7.5mm Width)18-SOX
STMicroelectronics IC RTC CLOCK/CALENDAR SPI 28-SOIC ActiveClock/CalendarAlarm, Leap Year, NVRAM, Square Wave Output, Watchdog Timer44BHH:MM:SS:hh (24 hr)YY-MM-DD-ddSPI2.7 V ~ 5.5 V2.5 V ~ 3.5 V1.4mA @ 2.7V ~ 5.5V-40°C ~ 85°CSurface Mount28-SOP (0.350", 8.89mm Width) with SNAPHAT Sockets28-SOH
STMicroelectronics IC RTC CLOCK/CALENDAR I2C 28-SOIC ActiveClock/CalendarAlarm, Leap Year, NVSRAM, Square Wave Output, Supervisor, Watchdog Timer128BHH:MM:SS:hh (24 hr)YY-MM-DD-ddI²C, 2-Wire Serial2.7 V ~ 3.6 V2.5 V ~ 3.6 V0.5mA @ 2.7V ~ 3.6V-40°C ~ 85°CSurface Mount28-SOIC (0.295", 7.50mm Width)28-SOX
STMicroelectronics IC RTC CLOCK/CALENDAR PAR 28-SOH ActiveClock/CalendarLeap Year
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HH:MM:SS (24 hr)YY-MM-DD-ddParallel4.5 V ~ 5.5 V
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3mA @ 4.5V ~ 5.5V0°C ~ 70°CSurface Mount28-SOIC (0.337", 8.56mm Width) with SNAPHAT Sockets28-SOH
STMicroelectronics IC RTC CLOCK/CALENDAR PAR 24DIP ActiveClock/CalendarLeap Year
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HH:MM:SS (24 hr)YY-MM-DD-ddParallel4.75 V ~ 5.5 V
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3mA @ 4.7V ~ 5.5V0°C ~ 70°CThrough Hole24-DIP Module (0.600", 15.24mm)24-PCDIP, CAPHAT®
STMicroelectronics IC RTC CLOCK/CALENDAR PAR 24DIP ActiveClock/CalendarLeap Year
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HH:MM:SS (24 hr)YY-MM-DD-ddParallel4.5 V ~ 5.5 V
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3mA @ 4.5V ~ 5.5V0°C ~ 70°CThrough Hole24-DIP Module (0.600", 15.24mm)24-PCDIP, CAPHAT®
STMicroelectronics IC RTC CLOCK/CALENDAR PAR 28DIP ActiveClock/CalendarLeap Year, Watchdog Timer
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HH:MM:SS (24 hr)YY-MM-DD-ddParallel4.5 V ~ 5.5 V
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3mA @ 4.5V ~ 5.5V0°C ~ 70°CThrough Hole28-DIP Module (0.600", 15.24mm)28-PCDIP, CAPHAT®
STMicroelectronics IC RTC CLOCK/CALENDAR PAR 28DIP ActiveClock/CalendarLeap Year, Watchdog Timer
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HH:MM:SS (24 hr)YY-MM-DD-ddParallel4.75 V ~ 5.5 V
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3mA @ 4.7V ~ 5.5V0°C ~ 70°CThrough Hole28-DIP Module (0.600", 15.24mm)28-PCDIP, CAPHAT®
STMicroelectronics IC RTC CLOCK/CALENDAR PAR 28DIP ActiveClock/CalendarLeap Year
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HH:MM:SS (24 hr)YY-MM-DD-ddParallel4.5 V ~ 5.5 V
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2mA @ 4.75V ~ 5.5V0°C ~ 70°CThrough Hole28-DIP Module (0.600", 15.24mm)28-PCDIP, CAPHAT®
STMicroelectronics IC RTC CLOCK/CALENDAR PAR 28DIP ActiveClock/CalendarLeap Year
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HH:MM:SS (24 hr)YY-MM-DD-ddParallel4.75 V ~ 5.5 V
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2mA @ 4.75V ~ 5.5V0°C ~ 70°CThrough Hole28-DIP Module (0.600", 15.24mm)28-PCDIP, CAPHAT®
STMicroelectronics IC RTC CLOCK/CALENDAR SPI 16-QFN ActiveClock/CalendarAlarm, Leap Year, Square Wave Output, SRAM, Watchdog Timer7BHH:MM:SS:hh (24 hr)YY-MM-DD-ddSPI3 V ~ 5.5 V1.8 V ~ 5.5 V10µA @ 5.5V-40°C ~ 85°CSurface Mount16-VQFN Exposed Pad16-QFN (4x4)
STMicroelectronics IC RTC CLOCK/CAL I2C 16-VFQFPN ActiveClock/CalendarAlarm, Leap Year, Square Wave Output, SRAM, Watchdog Timer7BHH:MM:SS:hh (24 hr)YY-MM-DD-ddI²C, 2-Wire Serial2.7 V ~ 5.5 V2 V ~ 5.5 V10µA @ 5.5V-40°C ~ 85°CSurface Mount16-VQFN Exposed Pad16-QFN (4x4)
STMicroelectronics IC RTC CLOCK/CALENDAR I2C 24-DIP ActiveClock/CalendarLeap Year
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HH:MM:SS (24 hr)YY-MM-DD-ddI²C, 2-Wire Serial2.7 V ~ 5.5 VIntegrated70µA @ 2.7V ~ 5.5V0°C ~ 70°CThrough Hole24-DIP (0.600", 15.24mm)24-PCDIP, CAPHAT®
STMicroelectronics IC RTC CLOCK/CALENDAR PAR 24DIP ActiveClock/CalendarLeap Year
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HH:MM:SS (24 hr)YY-MM-DD-ddParallel4.75 V ~ 5.5 V
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3mA @ 4.7V ~ 5.5V0°C ~ 70°CThrough Hole24-DIP Module (0.600", 15.24mm)24-PCDIP, CAPHAT®
STMicroelectronics IC RTC CLOCK/CALENDAR PAR 24DIP ActiveClock/CalendarLeap Year
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HH:MM:SS (24 hr)YY-MM-DD-ddParallel4.5 V ~ 5.5 V
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3mA @ 4.5V ~ 5.5V0°C ~ 70°CThrough Hole24-DIP Module (0.600", 15.24mm)24-PCDIP, CAPHAT®
STMicroelectronics IC RTC CLOCK/CALENDAR PAR 28DIP ActiveClock/CalendarLeap Year
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HH:MM:SS (24 hr)YY-MM-DD-ddParallel4.75 V ~ 5.5 V
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3mA @ 4.75V ~ 5.5V0°C ~ 70°CThrough Hole28-DIP Module (0.600", 15.24mm)28-PCDIP, CAPHAT®
STMicroelectronics IC RTC CLOCK/CALENDAR SPI 16-QFN ActiveClock/CalendarAlarm, Leap Year, Square Wave Output, SRAM, Watchdog Timer7BHH:MM:SS:hh (24 hr)YY-MM-DD-ddSPI2.7 V ~ 5.5 V1.8 V ~ 5.5 V10µA @ 5.5V-40°C ~ 85°CSurface Mount16-VQFN Exposed Pad16-QFN (4x4)
STMicroelectronics IC RTC CLOCK/CALENDAR I2C 16-QFN ActiveClock/CalendarAlarm, Leap Year, Square Wave Output, Watchdog Timer
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HH:MM:SS:hh (24 hr)YY-MM-DD-ddI²C, 2-Wire Serial1.3 V ~ 4.4 V
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0.7µA ~ 0.95µA @ 1.3V ~ 4.4V-40°C ~ 85°CSurface Mount16-VFQFN Exposed Pad16-QFN (3x3)
STMicroelectronics IC RTC CLOCK/CALENDAR I2C 16-QFN ActiveClock/CalendarAlarm, Leap Year, Square Wave Output, Watchdog Timer
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HH:MM:SS:hh (24 hr)YY-MM-DD-ddI²C, 2-Wire Serial1.5 V ~ 4.4 V
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0.9µA ~ 1.1µA @ 1.5V ~ 4.4V-40°C ~ 85°CSurface Mount16-VFQFN Exposed Pad16-QFN (3x3)
STMicroelectronics IC RTC CLOCK/CALENDAR I2C 8-SOIC ActiveClock/CalendarLeap Year
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HH:MM:SSYY-MM-DD-ddI²C, 2-Wire Serial2 V ~ 5.5 V2.5 V ~ 3.5 V70µA @ 2V ~ 5.5V-40°C ~ 85°CSurface Mount8-SOIC (0.154", 3.90mm Width)8-SO
STMicroelectronics IC RTC CLOCK/CALENDAR I2C 8-SOIC ActiveClock/CalendarLeap Year
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HH:MM:SS (24 hr)YY-MM-DD-ddI²C, 2-Wire Serial2.7 V ~ 5.5 V2 V ~ 3.5 V70µA @ 2.7V ~ 5.5V-40°C ~ 85°CSurface Mount8-SOIC (0.154", 3.90mm Width)8-SO
STMicroelectronics IC RTC CLOCK/CALENDAR SPI 16-QFN ActiveClock/CalendarAlarm, Leap Year, Square Wave Output, SRAM, Watchdog Timer7BHH:MM:SS:hh (24 hr)YY-MM-DD-ddSPI2.38 V ~ 5.5 V1.8 V ~ 5.5 V10µA @ 5.5V-40°C ~ 85°CSurface Mount16-VQFN Exposed Pad16-QFN (4x4)
STMicroelectronics IC RTC CLOCK/CALENDAR SPI 18-SOX ActiveClock/CalendarAlarm, Leap Year, Square Wave Output, SRAM, Watchdog Timer7BHH:MM:SS:hh (24 hr)YY-MM-DD-ddSPI2.38 V ~ 5.5 V1.8 V ~ 5.5 V10µA @ 5.5V-40°C ~ 85°CSurface Mount18-SOX, 18-SOIC with Crystal (7.5mm Width)18-SOX
STMicroelectronics IC RTC CLOCK/CALENDAR I2C 28-SOIC ActiveClock/CalendarLeap Year, NVSRAM56BHH:MM:SSYY-MM-DD-ddI²C, 2-Wire Serial2 V ~ 5.5 V2.5 V ~ 3.5 V70µA @ 2V ~ 5.5V-40°C ~ 85°CSurface Mount28-SOP (0.350", 8.89mm Width) with SNAPHAT Sockets28-SOH
STMicroelectronics IC RTC CLOCK/CALENDAR I2C 28-SOIC ActiveClock/CalendarAlarm, Leap Year, NVSRAM, Square Wave Output, Supervisor, Watchdog Timer44BHH:MM:SS:hh (24 hr)YY-MM-DD-ddI²C, 2-Wire Serial2.7 V ~ 3.6 V2.5 V ~ 3.5 V0.5mA @ 2.7V ~ 3.6V-40°C ~ 85°CSurface Mount28-SOIC (0.295", 7.50mm Width)28-SOX
STMicroelectronics IC RTC CLOCK/CALENDAR I2C 28-SOIC ActiveClock/CalendarAlarm, Leap Year, NVSRAM, Square Wave Output, Supervisor, Watchdog Timer44BHH:MM:SS:hh (24 hr)YY-MM-DD-ddI²C, 2-Wire Serial2.7 V ~ 3.6 V2.5 V ~ 3.5 V0.5mA @ 2.7V ~ 3.6V-40°C ~ 85°CSurface Mount28-SOP (0.350", 8.89mm Width) with SNAPHAT Sockets28-SOH
STMicroelectronics IC RTC CLOCK/CALENDAR PAR 44-SOH ActiveClock/CalendarAlarm, Leap Year, Square Wave Output, Supervisor, Watchdog Timer, Y2K
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HH:MM:SS (24 hr)YY-MM-DD-ddParallel4.5 V ~ 5.5 V3V3mA @ 4.5V ~ 5.5V0°C ~ 70°CSurface Mount44-BSOP (0.337", 8.56mm Width) requires SNAPHAT44-SOH
STMicroelectronics IC RTC CLOCK/CALENDAR PAR 44-SOH ActiveClock/CalendarAlarm, Leap Year, Square Wave Output, Supervisor, Watchdog Timer, Y2K
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HH:MM:SS (24 hr)YY-MM-DD-ddParallel3 V ~ 3.6 V3V2mA @ 3V ~ 3.6V0°C ~ 70°CSurface Mount44-BSOP (0.337", 8.56mm Width) requires SNAPHAT44-SOH
STMicroelectronics IC RTC CLOCK/CALENDAR PAR 28SOH ActiveClock/CalendarLeap Year
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HH:MM:SS (24 hr)YY-MM-DD-ddParallel3 V ~ 3.6 V
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2mA @ 3V ~ 3.6V0°C ~ 70°CSurface Mount28-SOP (0.350", 8.89mm Width) with SNAPHAT Sockets28-SOH
STMicroelectronics IC RTC CLOCK/CALENDAR PAR 44-SOH ActiveClock/CalendarAlarm, Leap Year, Watchdog Timer
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HH:MM:SS (24 hr)YY-MM-DD-ddParallel3 V ~ 3.6 V
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2mA @ 3V ~ 3.6V0°C ~ 70°CSurface Mount44-BSOP (0.337", 8.56mm Width) requires SNAPHAT44-SOH
STMicroelectronics IC RTC CLOCK/CALENDAR PAR 28SOH ActiveClock/CalendarLeap Year
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HH:MM:SS (24 hr)YY-MM-DD-ddParallel4.5 V ~ 5.5 V
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2mA @ 4.75V ~ 5.5V0°C ~ 70°CSurface Mount28-SOP (0.350", 8.89mm Width) with SNAPHAT Sockets28-SOH
STMicroelectronics IC RTC CLOCK/CALENDAR PAR 28DIP ActiveClock/CalendarLeap Year
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HH:MM:SS (24 hr)YY-MM-DD-ddParallel3 V ~ 3.6 V
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2mA @ 3V ~ 3.6V0°C ~ 70°CThrough Hole28-DIP Module (0.600", 15.24mm)28-PCDIP, CAPHAT®
STMicroelectronics IC RTC CLOCK/CALENDAR PAR 28DIP ActiveClock/CalendarLeap Year, Watchdog Timer
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HH:MM:SS (24 hr)YY-MM-DD-ddParallel4.5 V ~ 5.5 V
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3mA @ 4.5V ~ 5.5V0°C ~ 70°CThrough Hole28-DIP Module (0.600", 15.24mm)28-PCDIP, CAPHAT®
STMicroelectronics IC RTC CLOCK/CALENDAR I2C 16-QFN ActiveClock/CalendarLeap Year
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HH:MM:SS (24 hr)YY-MM-DD-ddI²C, 2-Wire Serial1.3 V ~ 4.4 V
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0.7µA ~ 0.95µA @ 3.6V ~ 4.4V-40°C ~ 85°CSurface Mount16-VFQFN Exposed Pad16-QFN (3x3)
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