Part Number Manufacturer / Brand Brife Description Part StatusTypeFeaturesMemory SizeTime FormatDate FormatInterfaceVoltage - SupplyVoltage - Supply, BatteryCurrent - Timekeeping (Max)Operating TemperatureMounting TypePackage / CaseSupplier Device Package
Texas Instruments IC RTC CLOCK/CALENDAR I2C 8-SOIC ActiveClock/CalendarLeap Year, Square Wave Output, Trickle-Charger
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HH:MM:SS (24 hr)YY-MM-DD-ddI²C, 2-Wire Serial3 V ~ 3.6 V1.4 V ~ 3.6 V100µA @ 3.3V-40°C ~ 85°CSurface Mount8-SOIC (0.154", 3.90mm Width)8-SOIC
Texas Instruments IC RTC CLOCK/CALENDAR I2C 8-SOIC ActiveClock/CalendarLeap Year, Square Wave Output, Trickle-Charger
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HH:MM:SS (24 hr)YY-MM-DD-ddI²C, 2-Wire Serial3 V ~ 3.6 V1.4 V ~ 3.6 V100µA @ 3.3V-40°C ~ 85°CSurface Mount8-SOIC (0.154", 3.90mm Width)8-SOIC
Texas Instruments IC RTC CLOCK/CALENDAR I2C 8-SOIC ActiveClock/CalendarLeap Year, Square Wave Output, Trickle-Charger
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HH:MM:SS (24 hr)YY-MM-DD-ddI²C, 2-Wire Serial3 V ~ 3.6 V1.4 V ~ 3.6 V65µA @ 3.3V-40°C ~ 85°CSurface Mount8-SOIC (0.154", 3.90mm Width)8-SOIC
Texas Instruments IC RTC CLOCK/CALENDAR PAR 28-SOIC ObsoleteClock/CalendarAlarm, Daylight Savings, Leap Year, Supervisor, Watchdog Timer
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HH:MM:SS (12/24 hr)YY-MM-DD-ddParallel4.75 V ~ 5.5 V2.3 V ~ 4 V1.5mA (Typ) @ 4.5 V ~ 5.5 V-40°C ~ 85°CSurface Mount28-SOIC (0.295", 7.50mm Width)28-SOIC
Texas Instruments IC RTC CLOCK/CALENDAR PAR 28-SOIC ObsoleteClock/CalendarAlarm, Daylight Savings, Leap Year, Supervisor, Watchdog Timer
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HH:MM:SS (12/24 hr)YY-MM-DD-ddParallel4.75 V ~ 5.5 V2.3 V ~ 4 V1.5mA (Typ) @ 4.5 V ~ 5.5 V-40°C ~ 85°CSurface Mount28-SOIC (0.295", 7.50mm Width)28-SOIC
Texas Instruments IC RTC CLOCK/CALENDAR PAR 28-SOIC ObsoleteClock/CalendarAlarm, Daylight Savings, Leap Year, Supervisor, Watchdog Timer
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HH:MM:SS (12/24 hr)YY-MM-DD-ddParallel4.5 V ~ 5.5 V2.3 V ~ 4 V1.5mA (Typ) @ 4.5 V ~ 5.5 V-40°C ~ 85°CSurface Mount28-SOIC (0.295", 7.50mm Width)28-SOIC
Texas Instruments IC RTC CLOCK/CALENDAR PAR 28-SOIC ObsoleteClock/CalendarAlarm, Daylight Savings, Leap Year, Supervisor, Watchdog Timer
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HH:MM:SS (12/24 hr)YY-MM-DD-ddParallel4.5 V ~ 5.5 V2.3 V ~ 4 V1.5mA (Typ) @ 4.5 V ~ 5.5 V-40°C ~ 85°CSurface Mount28-SOIC (0.295", 7.50mm Width)28-SOIC
Texas Instruments IC RTC CLOCK/CALENDAR PAR 32-DIP ObsoleteClock/CalendarAlarm
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HH:MM:SS (24 hr)YY-MM-DD-ddParallel4.5 V ~ 5.5 V
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1mA @ 4.5V ~ 5.5V-40°C ~ 85°CThrough Hole32-DIP Module (0.61", 15.49mm)32-DIP Module (18.42x52.96)
Texas Instruments IC RTC CLOCK/CALENDAR PAR 28-PLCC ActiveClock/CalendarAlarm, Leap Year
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HH:MM:SS:hh (12/24 hr)YY-MM-DD-ddParallel4.5 V ~ 5.5 V2.2 V ~ 5.1 V1µA @ 5V-40°C ~ 85°CSurface Mount28-LCC (J-Lead)28-PLCC (11.51x11.51)
Maxim Integrated IC RTC CLOCK/CALENDAR I2C 8-SOIC ActiveClock/CalendarLeap Year, NVSRAM, Square Wave Output56BHH:MM:SS (12/24 hr)YY-MM-DD-ddI²C, 2-Wire Serial3 V ~ 5.5 V1.3 V ~ 3.7 V125µA ~ 200µA @ 3.63V ~ 5.5V-40°C ~ 85°CSurface Mount8-SOIC (0.154", 3.90mm Width)8-SOIC
STMicroelectronics IC RTC CLOCK/CALENDAR I2C 28-SOH ObsoleteClock/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 I2C 8-SOIC ObsoleteClock/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/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 ObsoleteClock/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 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 I2C 28-SOIC ObsoleteClock/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/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 PHANTOM SER 28-SOIC ObsoletePhantom Time ChipLeap Year, Supervisor
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HH:MM:SS (12/24 hr)YY-MM-DD-ddSerial3 V ~ 3.6 V2.5 V ~ 3.7 V2mA @ 2.7V ~ 3.6V-40°C ~ 85°CSurface Mount28-SOP (0.350", 8.89mm Width) with SNAPHAT Sockets28-SOH
STMicroelectronics IC RTC CLOCK/CALENDAR I2C 18-SOIC ObsoleteClock/CalendarEEPROM, Leap Year, NVSRAM56B, 8KBHH:MM:SSYY-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 Mount18-SOX, 18-SOIC with Crystal (7.5mm Width)18-SOX
STMicroelectronics IC RTC CLOCK/CALENDAR I2C 8-SOIC ObsoleteClock/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 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/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)
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 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 Serial1.3 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 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/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 Discontinued at -Clock/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 V ~ 5.5 V2.5 V ~ 3.5 V100µA @ 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, Square Wave Output, Watchdog Timer
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HH:MM:SS:hh (24 hr)YY-MM-DD-ddI²C, 2-Wire Serial2 V ~ 5.5 V2.5 V ~ 3.5 V100µA @ 2V ~ 5.5V-40°C ~ 85°CSurface Mount8-SOIC (0.154", 3.90mm Width)8-SO
STMicroelectronics IC RTC CLOCK/CALENDAR I2C 8-SOIC ObsoleteClock/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/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 ObsoleteClock/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 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 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/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 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 ObsoleteClock/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 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 I2C 16-QFN 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 Mount16-VQFN Exposed Pad16-QFN (4x4)
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/CALENDAR SPI 28-SOIC ObsoleteClock/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 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 SPI 16-SOIC ObsoleteClock/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 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 PAR 28SOH ObsoleteClock/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 ~ 5.5V-40°C ~ 85°CSurface Mount28-SOP (0.350", 8.89mm Width) with SNAPHAT Sockets28-SOH
STMicroelectronics IC RTC CLOCK/CALENDAR PAR 44-SOH ObsoleteClock/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 ~ 3.6V-40°C ~ 85°CSurface Mount44-BSOP (0.337", 8.56mm Width) requires SNAPHAT44-SOH
STMicroelectronics IC RTC CLOCK/CALENDAR PAR 28SOH ObsoleteClock/CalendarAlarm, Leap 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 ~ 5.5V-40°C ~ 85°CSurface Mount28-SOP (0.350", 8.89mm Width) with SNAPHAT Sockets28-SOH
Microchip Technology IC RTC CLOCK/CALENDAR I2C 8-TSSOP ActiveClock/CalendarAlarm, Leap Year, Square Wave Output, SRAM, Unique ID64B, 1KbHH:MM:SS (12/24 hr)YY-MM-DD-ddI²C, 2-Wire Serial1.8 V ~ 5.5 V1.3 V ~ 5.5 V1.2µA @ 3.3V-40°C ~ 85°CSurface Mount8-TSSOP (0.173", 4.40mm Width)8-TSSOP
Renesas Electronics America Inc. IC RTC CLOCK/CALENDAR I2C 8-SOIC ObsoleteClock/CalendarAlarm, Leap Year, Supervisor, Watchdog Timer
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HH:MM:SS (12/24 hr)YY-MM-DD-ddI²C, 2-Wire Serial2.7 V ~ 5.5 V1.8 V ~ 5.5 V10µA ~ 20µA @ 2.7V ~ 5V-40°C ~ 85°CSurface Mount8-SOIC (0.154", 3.90mm Width)8-SOIC
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