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Manufacturers for Clock/Timing - Real Time Clocks

Abracon LLC.
Ambiq Micro, Inc.
ams
AVX Corporation
Diodes Incorporated
Epson
Integrated Device Technology, Inc.
Intersil (Renesas Electronics America)
Maxim Integrated
Microchip Technology
NJR Corporation/NJRC
NXP Semiconductors
ROHM Semiconductor
ABLIC U.S.A. Inc.
STMicroelectronics
Texas Instruments
Part Number Manufacturer / Brand Brife Description Part StatusTypeFeaturesMemory SizeTime FormatDate FormatInterfaceVoltage - SupplyVoltage - Supply, BatteryCurrent - Timekeeping (Max)Operating TemperatureMounting TypePackage / CaseSupplier Device Package
DS1746P-70IND+
 Maxim Integrated IC RTC CLOCK/CALENDAR PAR 34-PCM ActiveClock/CalendarLeap Year, NVSRAM, Y2K128KBHH:MM:SS (24 hr)YY-MM-DD-ddParallel4.5 V ~ 5.5 V3V4mA @ 5V-40°C ~ 85°CSurface Mount34-PowerCap™ Module34-PowerCap Module
DS1556W-120IND+
 Maxim Integrated IC RTC CLOCK/CALENDAR PAR 32-EDIP ActiveClock/CalendarAlarm, Leap Year, NVSRAM, Watchdog Timer, Y2K128KBHH:MM:SS (24 hr)YY-MM-DD-ddParallel2.97 V ~ 3.63 V
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4mA @ 3.3V-40°C ~ 85°CThrough Hole32-DIP Module (0.600", 15.24mm)32-EDIP
DS1251WP-120+
 Maxim Integrated IC RTC PHANTOM PAR 34-PCM ActivePhantom Time ChipLeap Year, NVSRAM512KBHH:MM:SS:hh (12/24 hr)YY-MM-DD-ddParallel2.97 V ~ 3.63 V3V7mA @ 3.3V0°C ~ 70°CSurface Mount34-PowerCap™ Module34-PowerCap Module
DS1747-70IND+
 Maxim Integrated IC RTC CLOCK/CALENDAR PAR 32-EDIP ActiveClock/CalendarLeap Year, NVSRAM, Y2K512KBHH:MM:SS (24 hr)YY-MM-DD-ddParallel4.5 V ~ 5.5 V
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4mA @ 5V-40°C ~ 85°CThrough Hole32-DIP Module (0.600", 15.24mm)32-EDIP
DS1251W-120IND+
 Maxim Integrated IC RTC PHANTOM PAR 32-DIP ActivePhantom Time ChipLeap Year, NVSRAM512KBHH:MM:SS:hh (12/24 hr)YY-MM-DD-ddParallel2.97 V ~ 3.63 V
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7mA @ 3.3V-40°C ~ 85°CThrough Hole32-DIP Module (0.600", 15.24mm)32-EDIP
DS1251WP-120IND+
 Maxim Integrated IC RTC PHANTOM PAR 34-PCM ActivePhantom Time ChipLeap Year, NVSRAM512KBHH:MM:SS:hh (12/24 hr)YY-MM-DD-ddParallel2.97 V ~ 3.63 V3V7mA @ 3.3V-40°C ~ 85°CSurface Mount34-PowerCap™ Module34-PowerCap Module
DS1251YP-70IND+
 Maxim Integrated IC RTC PHANTOM PAR 34-PCM ActivePhantom Time ChipLeap Year, NVSRAM512kbHH:MM:SS:hh (12/24 hr)YY-MM-DD-ddParallel4.5 V ~ 5.5 V3V10mA @ 5V-40°C ~ 85°CSurface Mount34-PowerCap™ Module34-PowerCap Module
PCF8564AU/5GB/1,01
 NXP USA Inc. IC RTC CLOCK/CALENDAR I2C DIE ActiveClock/CalendarAlarm, Leap Year, Square Wave Output, Watchdog Timer
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HH:MM:SS (24 hr)YY-MM-DD-ddI²C, 2-Wire Serial1 V ~ 5.5 V
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0.6µA ~ 0.75µA @ 2V ~ 5V-40°C ~ 85°CSurface MountDieDie
PCF8564AU/5BB/1,01
 NXP USA Inc. IC RTC CLOCK/CALENDAR I2C DIE ActiveClock/CalendarAlarm, Leap Year, Square Wave Output, Watchdog Timer
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HH:MM:SS (24 hr)YY-MM-DD-ddI²C, 2-Wire Serial1 V ~ 5.5 V
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0.6µA ~ 0.75µA @ 2V ~ 5V-40°C ~ 85°CSurface MountDieDie
PCF2123U/12HA/1,00
 NXP USA Inc. IC RTC CLOCK/CALENDAR SPI DIE ActiveClock/CalendarAlarm, Leap Year, Square Wave Output, Watchdog Timer
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HH:MM:SS (12/24 hr)YY-MM-DD-ddSPI1.6 V ~ 5.5 V
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0.33µA ~ 0.38µA @ 2V ~ 5V-40°C ~ 85°C
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DieDie
PCF8564AU/10AB/1,0
 NXP USA Inc. IC RTC CLOCK/CALENDAR I2C DIE ActiveClock/CalendarAlarm, Leap Year, Square Wave Output, Watchdog Timer
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HH:MM:SS (24 hr)YY-MM-DD-ddI²C, 2-Wire Serial1 V ~ 5.5 V
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0.6µA ~ 0.75µA @ 2V ~ 5V-40°C ~ 85°CSurface MountDieDie
PCF85063AT/AAZ
 NXP USA Inc. IC RTC CLOCK/CALENDAR I2C 8SOIC ActiveClock/CalendarAlarm, Leap Year, Square Wave Output
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HH:MM:SS (12/24 hr)YY-MM-DD-ddI²C, 2-Wire Serial0.9 V ~ 5.5 V
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0.6µA @ 3.3V-40°C ~ 85°CSurface Mount8-SOIC (0.154", 3.90mm Width)8-SO
PCF8564AUG/12HB/1V
 NXP USA Inc. IC RTC CLOCK/CALENDAR I2C DIE ActiveClock/CalendarAlarm, Leap Year, Square Wave Output, Watchdog Timer
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HH:MM:SS (24 hr)YY-MM-DD-ddI²C, 2-Wire Serial1 V ~ 5.5 V
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0.6µA ~ 0.75µA @ 2V ~ 5V-40°C ~ 85°CSurface MountDieDie
PCF8523AUG/HAV
 NXP USA Inc. IC RTC CLOCK/CALENDAR I2C 12WLCSP Active
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PCF2123U/10AA/1,00
 NXP USA Inc. IC RTC CLOCK/CALENDAR SPI DIE ActiveClock/CalendarAlarm, Leap Year, Square Wave Output, Watchdog Timer
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HH:MM:SS (12/24 hr)YY-MM-DD-ddSPI1.6 V ~ 5.5 V
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0.33µA ~ 0.38µA @ 2V ~ 5V-40°C ~ 85°CSurface MountDieDie
PCA8565AU/5BB/1,01
 NXP USA Inc. IC RTC CLOCK/CALENDAR I2C UNCASED ActiveClock/CalendarAlarm, Leap Year, Square Wave Output, Watchdog Timer
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HH:MM:SS (24 hr)YY-MM-DD-ddI²C, 2-Wire Serial1.8 V ~ 5.5 V
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0.9µA ~ 1.8µA @ 2V ~ 5V-40°C ~ 125°CSurface MountDieDie
DS1244W-120IND+
 Maxim Integrated IC RTC PHANTOM PAR 28-DIP ActivePhantom Time ChipLeap Year, NVSRAM32KBHH:MM:SS:hh (12/24 hr)YY-MM-DD-ddParallel2.97 V ~ 3.63 V
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7mA @ 3.3V-40°C ~ 85°CThrough Hole28-DIP Module (0.600", 15.24mm)28-EDIP
DS1554W-120+
 Maxim Integrated IC RTC CLOCK/CALENDAR PAR 32-EDIP ActiveClock/CalendarAlarm, Leap Year, NVSRAM, Watchdog Timer, Y2K32KBHH:MM:SS (24 hr)YY-MM-DD-ddParallel2.97 V ~ 3.63 V
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4mA @ 3.3V0°C ~ 70°CThrough Hole32-DIP Module (0.600", 15.24mm)32-EDIP
DS1746WP-120IND+
 Maxim Integrated IC RTC CLOCK/CALENDAR PAR 34-PCM ActiveClock/CalendarLeap Year, NVSRAM, Y2K128KBHH:MM:SS (24 hr)YY-MM-DD-ddParallel2.97 V ~ 3.63 V3V2mA @ 3.3V-40°C ~ 85°CSurface Mount34-PowerCap™ Module34-PowerCap Module
PCF8583P/F5,112
 NXP USA Inc. IC RTC CLOCK/CALENDAR I2C 8-DIP ObsoleteClock/CalendarAlarm, NVSRAM, Square Wave Output240BHH:MM:SS:hh (12/24 hr)YY-MM-DDI²C, 2-Wire Serial2.5 V ~ 6 V
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10µA ~ 50µA @ 1V ~ 5V-40°C ~ 85°CThrough Hole8-DIP (0.300", 7.62mm)8-DIP
PCF8593P,112
 NXP USA Inc. IC RTC CLOCK/CALENDAR I2C 8-DIP ObsoleteClock/CalendarAlarm, NVSRAM8BHH:MM:SS:hh (12/24 hr)YY-MM-DD-ddI²C, 2-Wire Serial2.5 V ~ 6 V
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8µA ~ 15µA @ 2V ~ 5V-40°C ~ 85°CThrough Hole8-DIP (0.300", 7.62mm)8-DIP
PCF8563P/F4,112
 NXP USA Inc. IC RTC CLOCK/CALENDAR I2C 8-DIP ObsoleteClock/CalendarAlarm, Leap Year, Watchdog Timer
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HH:MM:SS (24 hr)YY-MM-DD-ddI²C, 2-Wire Serial1.8 V ~ 5.5 V
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0.6µA ~ 0.75µA @ 2V ~ 5V-40°C ~ 85°CThrough Hole8-DIP (0.300", 7.62mm)8-DIP
RTC-62421A
 EPSON IC RTC CLOCK/CALENDAR PAR 18-DIP ObsoleteClock/CalendarLeap Year
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HH:MM:SS (12/24 hr)YY-MM-DD-ddParallel4.5 V ~ 5.5 V
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1.8µA ~ 3µA @ 2V ~ 5V-40°C ~ 85°CThrough Hole18-DIP (0.300", 7.62mm)18-DIP
RTC-72421A
 EPSON IC RTC CLOCK/CALENDAR PAR 18-DIP ObsoleteClock/CalendarLeap Year
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HH:MM:SS (12/24 hr)YY-MM-DD-ddParallel4.5 V ~ 5.5 V
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5µA ~ 10µA @ 2V ~ 5V-10°C ~ 70°CThrough Hole18-DIP (0.300", 7.62mm)18-DIP
RTC-72421B
 EPSON IC RTC CLOCK/CALENDAR PAR 18-DIP ObsoleteClock/CalendarLeap Year
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HH:MM:SS (12/24 hr)YY-MM-DD-ddParallel4.5 V ~ 5.5 V
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5µA ~ 10µA @ 2V ~ 5V-10°C ~ 70°CThrough Hole18-DIP (0.300", 7.62mm)18-DIP
RTC-72423A
 EPSON IC RTC CLOCK/CALENDAR PAR 24-SOP ObsoleteClock/CalendarLeap Year
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HH:MM:SS (12/24 hr)YY-MM-DD-ddParallel4.5 V ~ 5.5 V
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5µA ~ 10µA @ 2V ~ 5V-40°C ~ 85°CSurface Mount24-SOIC (0.311", 7.90mm Width)24-SOP
RTC-72423B
 EPSON IC RTC CLOCK/CALENDAR PAR 24-SOP ObsoleteClock/CalendarLeap Year
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HH:MM:SS (12/24 hr)YY-MM-DD-ddParallel4.5 V ~ 5.5 V
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5µA ~ 10µA @ 2V ~ 5V-40°C ~ 85°CSurface Mount24-SOIC (0.311", 7.90mm Width)24-SOP
DP8573AN
 Texas Instruments IC RTC CLOCK/CALENDAR PAR 24-DIP ObsoleteClock/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°CThrough Hole24-DIP (0.300", 7.62mm)24-DIP
RTC-63423B
 EPSON IC RTC CLOCK/CALENDAR PAR 24-SOIC ObsoleteClock/CalendarAlarm
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HH:MM:SS (12/24 hr)YY-MM-DD-ddParallel4.5 V ~ 5.5 V
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-40°C ~ 85°CSurface Mount24-SOIC (0.311", 7.90mm Width)24-SOP
RTC-63421B
 EPSON IC RTC CLOCK/CALENDAR PAR 18-DIP ObsoleteClock/CalendarAlarm
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HH:MM:SS (12/24 hr)YY-MM-DD-ddParallel4.5 V ~ 5.5 V
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-40°C ~ 85°CThrough Hole18-DIP (0.300", 7.62mm)18-DIP
RTC-4553A2
 EPSON IC RTC CLOCK/CALENDAR SER 14-SOIC ObsoleteClock/CalendarLeap Year, SRAM120bHH:MM:SS (12/24 hr)YY-MM-DD-dd4-Wire Serial2.7 V ~ 5.5 V
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3µA @ 5V-30°C ~ 70°CSurface Mount14-SOIC (0.209", 5.30mm Width)14-SOP
RTC-4543SA:A0
 EPSON IC RTC CLOCK/CALENDAR SER 14-SOIC ObsoleteClock/CalendarLeap Year
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HH:MM:SS (24 hr)YY-MM-DD-dd3-Wire Serial2.5 V ~ 5.5 V
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1µA ~ 3µA @ 2V ~ 5V-40°C ~ 85°CSurface Mount14-SOIC (0.209", 5.30mm Width)14-SOP
RTC-4543SB:A
 EPSON IC RTC CLOCK/CALENDAR SER 18-SOP ObsoleteClock/CalendarLeap Year
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HH:MM:SS (24 hr)YY-MM-DD-dd3-Wire Serial2.5 V ~ 5.5 V
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1µA ~ 3µA @ 2V ~ 5V-40°C ~ 85°CSurface Mount18-SOIC (0.209", 5.30mm Width)18-SOP
RTC-72423A:2
 EPSON IC RTC CLOCK/CALENDAR PAR 24-SOP ObsoleteClock/CalendarLeap Year
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HH:MM:SS (12/24 hr)YY-MM-DD-ddParallel4.5 V ~ 5.5 V
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5µA ~ 10µA @ 2V ~ 5V-40°C ~ 85°CSurface Mount24-SOIC (0.311", 7.90mm Width)24-SOP
BQ3285EP
 Texas Instruments IC RTC CLOCK/CALENDAR PAR 24-DIP ObsoleteClock/CalendarAlarm, Daylight Savings, Leap Year, NVSRAM, Square Wave Output242BHH:MM:SS (12/24 hr)YY-MM-DD-ddParallel4.5 V ~ 5.5 V2.5 V ~ 4 V300µA @ 5V0°C ~ 70°CThrough Hole24-DIP (0.600", 15.24mm)24-PDIP
BQ3285ESS
 Texas Instruments IC RTC CLOCK/CALENDAR PAR 24-QSOP ObsoleteClock/CalendarAlarm, Daylight Savings, Leap Year, NVSRAM, Square Wave Output242BHH:MM:SS (12/24 hr)YY-MM-DD-ddParallel4.5 V ~ 5.5 V2.5 V ~ 4 V300µA @ 5V0°C ~ 70°CSurface Mount24-SSOP (0.154", 3.90mm Width)24-SSOP/QSOP
BQ3285LDSS
 Texas Instruments IC RTC CLOCK/CALENDAR PAR 24-QSOP ObsoleteClock/CalendarAlarm, Daylight Savings, NVSRAM242BHH:MM:SS (12/24 hr)YY-MM-DD-ddParallel2.7 V ~ 5.5 V2.4 V ~ 4 V100µA @ 3V0°C ~ 70°CSurface Mount24-SSOP (0.154", 3.90mm Width)24-SSOP/QSOP
BQ3285LFSS-A1
 Texas Instruments IC RTC CLOCK/CALENDAR PAR 24-QSOP ObsoleteClock/CalendarAlarm, Daylight Savings, Leap Year, NVSRAM, Square Wave Output242BHH:MM:SS (12/24 hr)YY-MM-DD-ddParallel2.7 V ~ 5.5 V2.4 V ~ 4 V100µA @ 3V0°C ~ 70°CSurface Mount24-SSOP (0.154", 3.90mm Width)24-SSOP/QSOP
BQ3287EAMT
 Texas Instruments IC RTC CLOCK/CALENDAR PAR 24-DIP ObsoleteClock/CalendarAlarm, Daylight Savings, Leap Year, NVSRAM, Square Wave Output242BHH:MM:SS (12/24 hr)YY-MM-DD-ddParallel4.5 V ~ 5.5 V
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0°C ~ 70°CThrough Hole24-DIP Module (0.61", 15.49mm)24-DIP Module (18.42x18.72)
BQ3287EMT
 Texas Instruments IC RTC CLOCK/CALENDAR PAR 24-DIP ObsoleteClock/CalendarAlarm, Daylight Savings, Leap Year, NVSRAM, Square Wave Output242BHH:MM:SS (12/24 hr)YY-MM-DD-ddParallel4.5 V ~ 5.5 V
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0°C ~ 70°CThrough Hole24-DIP Module (0.61", 15.49mm)24-DIP Module (18.42x18.72)
BQ4285EP
 Texas Instruments IC RTC CLOCK/CALENDAR PAR 24-DIP ObsoleteClock/CalendarAlarm, Daylight Savings, Leap Year, NVSRAM, Square Wave Output114BHH:MM:SS (12/24 hr)YY-MM-DD-ddParallel4.5 V ~ 5.5 V2.5 V ~ 4 V300µA @ 5V0°C ~ 70°CThrough Hole24-DIP (0.600", 15.24mm)24-PDIP
BQ4285P-SB2
 Texas Instruments IC RTC CLOCK/CALENDAR PAR 24-DIP ObsoleteClock/CalendarAlarm, Daylight Savings, Leap Year, NVSRAM, Square Wave Output114BHH:MM:SS (12/24 hr)YY-MM-DD-ddParallel4.5 V ~ 5.5 V2.5 V ~ 4 V
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0°C ~ 70°CThrough Hole24-DIP (0.600", 15.24mm)24-PDIP
BQ4285S-SB2
 Texas Instruments IC RTC CLOCK/CALENDAR PAR 24-SOP ObsoleteClock/CalendarAlarm, Daylight Savings, Leap Year, NVSRAM, Square Wave Output114BHH:MM:SS (12/24 hr)YY-MM-DD-ddParallel4.5 V ~ 5.5 V2.5 V ~ 4 V
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0°C ~ 70°CSurface Mount24-SOIC (0.295", 7.50mm Width)24-SOIC
BQ4822YMA-70
 Texas Instruments IC RTC CLOCK/CALENDAR PAR 28-DIP ObsoleteClock/CalendarAlarm, Leap Year, Supervisor, Watchdog Timer
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HH:MM:SS:hh (24 hr)YY-MM-DD-ddParallel4.5 V ~ 5.5 V
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6mA @ 2.2 V ~ 5.8 V0°C ~ 70°CThrough Hole28-DIP Module (0.61", 15.49mm)28-DIP Module (18.42x37.72)
BQ4832YMA-85
 Texas Instruments IC RTC CLOCK/CALENDAR PAR 32-DIP ObsoleteClock/CalendarAlarm, Supervisor, Watchdog Timer
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HH:MM:SS:hh (24 hr)YY-MM-DD-ddParallel4.5 V ~ 5.5 V
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4mA @ 4.5 V ~ 5.5 V0°C ~ 70°CThrough Hole32-DIP Module (0.61", 15.49mm)32-DIP Module (18.42x42.8)
BQ4842YMA-85
 Texas Instruments IC RTC CLOCK/CALENDAR PAR 32-DIP ObsoleteClock/CalendarAlarm, Supervisor, Watchdog Timer
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HH:MM:SS:hh (24 hr)YY-MM-DD-ddParallel4.5 V ~ 5.5 V
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4mA @ 4.5 V ~ 5.5 V0°C ~ 70°CThrough Hole32-DIP Module (0.61", 15.49mm)32-DIP Module (18.42x42.8)
BQ4845P-A4
 Texas Instruments IC RTC CLOCK/CALENDAR PAR 28-DIP 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 V0°C ~ 70°CThrough Hole28-DIP (0.600", 15.24mm)28-PDIP
BQ4845S-A4
 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 V0°C ~ 70°CSurface Mount28-SOIC (0.295", 7.50mm Width)28-SOIC
BQ4845S-A4N
 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
BQ4845YS-A4
 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 V0°C ~ 70°CSurface Mount28-SOIC (0.295", 7.50mm Width)28-SOIC
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