Real Time Clock – Mouser Japan

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Real-Time Clock (RTC) Modules

Micro Crystal Real-Time Clock (RTC) Modules combine a 32.768kHz tuning fork crystal resonator with a CMOS-based oscillator and an RTC IC housed in a miniature SMD ceramic package. The RTC modules offer high accuracy, temperature compensation, and low current consumption. These cost-effective Micro Crystal modules have an extended operating temperature and are AEC-Q200 qualified. Applications include the Internet of Things (IoT), smart metering, energy harvesting solutions, battery management systems, automotive, industrial, computing, embedded systems, wearables, healthcare, and more.

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Image	Part #	Mfr.	Description	Datasheet	Availability	Pricing (JPY) Filter the results in the table by unit price based on your quantity.	Qty.	Interface Type	Date Format	Time Format	Package / Case	Battery Backup Switching	Supply Voltage - Min	Supply Voltage - Max	Minimum Operating Temperature	Maximum Operating Temperature	Series	Mounting Style	Time Keeping Current	Packaging
Real Time Clock 32.768kHz SPI Time Acc. 25ppm AEC RV-3149-C3 32.768kHz OPTION B TB QA Micro Crystal 1: ¥598 1,381In Stock	Mfr. Part # RV-3149-C3 32.768kHz OPTION B TB QA Mouser Part # 428-203684-MG01	Micro Crystal	Real Time Clock 32.768kHz SPI Time Acc. 25ppm AEC Learn More about Micro Crystal real time clock modules	Datasheet	1,381In Stock	Cut Tape ¥598 ¥450.1 ¥413.6 ¥372.1 Reel ¥337.2 View ¥352.1 ¥347.1 ¥333.9 ¥328.9 MouseReel Available	Min.: 1 Mult.: 1 : 1,000	SPI	YY-MM-DD-dd	HH:MM:SS (24 hr)		Backup Switching	1.3 V	5.5 V	- 40 C	+ 125 C	RV-3149	SMD/SMT	800 nA	Reel, Cut Tape, MouseReel
Real Time Clock 32.768kHz SPI Time Acc. 6ppm RV-3149-C3 32.768kHz OPTION A TA QC Micro Crystal 1: ¥719.2 19In Stock 1,000On Order	Mfr. Part # RV-3149-C3 32.768kHz OPTION A TA QC Mouser Part # 428-203658-MG01	Micro Crystal	Real Time Clock 32.768kHz SPI Time Acc. 6ppm Learn More about Micro Crystal real time clock modules	Datasheet	19In Stock 1,000On Order	Cut Tape ¥719.2 ¥541.5 ¥498.3 ¥448.5 Reel ¥408.6 View ¥426.9 ¥423.6 ¥403.6 MouseReel Available	Min.: 1 Mult.: 1 : 1,000	SPI	YY-MM-DD-dd	HH:MM:SS (24 hr)		Backup Switching	1.3 V	5.5 V	- 40 C	+ 85 C	RV-3149	SMD/SMT	800 nA	Reel, Cut Tape, MouseReel
Real Time Clock 32.768kHz SPI Time Acc. 25ppm RV-3149-C3 32.768kHz OPTION B TA QC Micro Crystal 1: ¥614.6 717In Stock	Mfr. Part # RV-3149-C3 32.768kHz OPTION B TA QC Mouser Part # 428-203605-MG01	Micro Crystal	Real Time Clock 32.768kHz SPI Time Acc. 25ppm Learn More about Micro Crystal real time clock modules	Datasheet	717In Stock	Cut Tape ¥614.6 ¥461.8 ¥425.2 ¥382 Reel ¥333.9 View ¥360.4 ¥352.1 ¥323.9 ¥317.3 MouseReel Available	Min.: 1 Mult.: 1 : 1,000	SPI	YY-MM-DD-dd	HH:MM:SS (24 hr)		Backup Switching	1.3 V	5.5 V	- 40 C	+ 85 C	RV-3149	SMD/SMT	800 nA	Reel, Cut Tape, MouseReel
Real Time Clock 32.768kHz I2C Time Acc. 25ppm RV-3129-C3 32.768kHz OPTION B TA QC Micro Crystal 1: ¥526.5 1,287In Stock	Mfr. Part # RV-3129-C3 32.768kHz OPTION B TA QC Mouser Part # 428-203634-MG01	Micro Crystal	Real Time Clock 32.768kHz I2C Time Acc. 25ppm Learn More about Micro Crystal real time clock modules	Datasheet	1,287In Stock	Cut Tape ¥526.5 ¥395.3 ¥362.1 ¥325.6 Reel ¥300.6 View ¥308.9 ¥295.7 ¥292.3 MouseReel Available	Min.: 1 Mult.: 1 : 1,000	I2C	YY-MM-DD-dd	HH:MM:SS (24 hr)		Backup Switching	1.3 V	5.5 V	- 40 C	+ 85 C	RV-3129	SMD/SMT	800 nA	Reel, Cut Tape, MouseReel
Real Time Clock 32.768 kHz +/-20 PPM SPI -40/+85C RV-8063-C7-32.768KHZ-20PPM-TA-QC Micro Crystal 1: ¥262.4 1,470In Stock	Mfr. Part # RV-8063-C7-32.768KHZ-20PPM-TA-QC Mouser Part # 428-203119-MG01	Micro Crystal	Real Time Clock 32.768 kHz +/-20 PPM SPI -40/+85C Learn More about Micro Crystal real time clock modules	Datasheet	1,470In Stock	Cut Tape ¥262.4 ¥192.7 ¥174.4 ¥153.5 Reel ¥138.4 View ¥144.2 ¥140.4 ¥131.7 ¥129.2 MouseReel Available	Min.: 1 Mult.: 1 : 1,000	Serial, I2C, SPI	YY-MM-DD-dd	HH:MM:SS (24 hr)		No Backup Switching	900 mV	5.5 V	- 40 C	+ 85 C	RV-8063-C7	SMD/SMT	190 nA	Reel, Cut Tape, MouseReel
Real Time Clock 32.768kHz SPI Time Acc. 6ppm AEC RV-3149-C3 32.768kHz OPTION A TB QA Micro Crystal 1: ¥774 52In Stock 1,000Expected 6/18/2027	Mfr. Part # RV-3149-C3 32.768kHz OPTION A TB QA Mouser Part # 428-203641-MG01	Micro Crystal	Real Time Clock 32.768kHz SPI Time Acc. 6ppm AEC Learn More about Micro Crystal real time clock modules	Datasheet	52In Stock 1,000Expected 6/18/2027	Cut Tape ¥774 ¥588 ¥541.5 ¥490 View Reel ¥446.8 ¥465.1 ¥460.1 ¥446.8 MouseReel Available	Min.: 1 Mult.: 1 : 1,000	SPI	YY-MM-DD-dd	HH:MM:SS (24 hr)		Backup Switching	1.3 V	5.5 V	- 40 C	+ 125 C	RV-3149	SMD/SMT	800 nA	Reel, Cut Tape, MouseReel
Real Time Clock 32.768kHz SPI 20ppm 2.0x1.2x0.7 AEC-Q200 RV-8063-C8 32.768kHz-20PPM-TA-QA Micro Crystal 1: ¥262.4 26In Stock 1,000Expected 2/5/2027	Mfr. Part # RV-8063-C8 32.768kHz-20PPM-TA-QA Mouser Part # 428-204290-MC01	Micro Crystal	Real Time Clock 32.768kHz SPI 20ppm 2.0x1.2x0.7 AEC-Q200 Learn More about Micro Crystal rv 8063 c8 rtc modules	Datasheet	26In Stock 1,000Expected 2/5/2027	Cut Tape ¥262.4 ¥192.7 ¥174.4 ¥153.5 Reel ¥138.4 View ¥144.2 ¥140.4 ¥131.7 ¥129.2 MouseReel Available	Min.: 1 Mult.: 1 : 1,000	Serial 3-Wire, SPI	YY-MM-DD-dd	HH:MM:SS:hh (12 hr, 24 hr)	SON-8		900 mV	5.5 V	- 40 C	+ 85 C	RV-8063-C8	SMD/SMT	190 nA	Reel, Cut Tape, MouseReel
Real Time Clock 32.768kHz I2C Time Acc. 25ppm AEC RV-3129-C3 32.768kHz OPTION B TB QA Micro Crystal 1: ¥657.8 8,230On Order	Mfr. Part # RV-3129-C3 32.768kHz OPTION B TB QA Mouser Part # 428-203639-MG01	Micro Crystal	Real Time Clock 32.768kHz I2C Time Acc. 25ppm AEC Learn More about Micro Crystal real time clock modules	Datasheet	8,230On Order On Order Ship Dates Mfr. #: RV-3129-C3 32.768kHz OPTION B TB QA Stock: 0 On Order: 3,230 Expected 11/17/2026 5,000 Expected 12/4/2026 Factory Lead-Time: 6 Weeks	Cut Tape ¥657.8 ¥496.6 ¥456.8 ¥411.9 Reel ¥378.7 View ¥390.3 ¥385.4 ¥370.4 MouseReel Available	Min.: 1 Mult.: 1 : 1,000	I2C	YY-MM-DD-dd	HH:MM:SS (24 hr)		Backup Switching	1.3 V	5.5 V	- 40 C	+ 125 C	RV-3129	SMD/SMT	800 nA	Reel, Cut Tape, MouseReel
Real Time Clock 32.768 kHz +/-20 PPM I2C -40/+85C RV-4162-C7-32.768kHz-20PPM-TA-QC Micro Crystal 1: ¥433.5 30,062Expected 11/13/2026	Mfr. Part # RV-4162-C7-32.768kHz-20PPM-TA-QC Mouser Part # 428-200007-MG01	Micro Crystal	Real Time Clock 32.768 kHz +/-20 PPM I2C -40/+85C Learn More about Micro Crystal real time clock modules	Datasheet	30,062Expected 11/13/2026	Cut Tape ¥433.5 ¥322.2 ¥294 ¥264.1 Reel ¥230.9 View ¥249.2 ¥242.5 ¥225.9 ¥224.2 MouseReel Available	Min.: 1 Mult.: 1 : 1,000	Serial 2-Wire, I2C	YY-MM-DD-dd	HH:MM:SS:hh (12 hr, 24 hr)		No Backup Switching	1 V	4.4 V	- 40 C	+ 85 C	RV-4162-C7	SMD/SMT	350 nA	Reel, Cut Tape, MouseReel
Real Time Clock 32.768 kHz +/-3 PPM I2C -40/+85C RV-8803-C7-32.768KHZ-3PPM-TA-QC Micro Crystal 1: ¥486.7 93,760On Order	Mfr. Part # RV-8803-C7-32.768KHZ-3PPM-TA-QC Mouser Part # 428-202677-MG01	Micro Crystal	Real Time Clock 32.768 kHz +/-3 PPM I2C -40/+85C Learn More about Micro Crystal real time clock modules	Datasheet	93,760On Order On Order Ship Dates Mfr. #: RV-8803-C7-32.768KHZ-3PPM-TA-QC Stock: 0 On Order: 13,760 Expected 11/11/2026 36,000 Expected 3/5/2027 44,000 Expected 4/30/2027 Factory Lead-Time: 29 Weeks	Cut Tape ¥486.7 ¥397 ¥373.7 ¥337.2 View Reel ¥255.8 ¥265.8 ¥260.8 ¥255.8 MouseReel Available	Min.: 1 Mult.: 1 : 1,000	Serial 2-Wire, I2C	YY-MM-DD-dd	HH:MM:SS:hh (12 hr, 24 hr)		No Backup Switching	1.5 V	5.5 V	- 40 C	+ 85 C	RV-8803-C7	SMD/SMT	240 nA	Reel, Cut Tape, MouseReel
Real Time Clock 32.768kHz I2C Time Acc. 1ppm RV-3028-C7 32.768kHz 1ppm TA QC Micro Crystal 1: ¥400.3 180,900On Order	Mfr. Part # RV-3028-C7 32.768kHz 1ppm TA QC Mouser Part # 428-203591-MG01	Micro Crystal	Real Time Clock 32.768kHz I2C Time Acc. 1ppm Learn More about Micro Crystal rv 3028 c7	Datasheet	180,900On Order On Order Ship Dates Mfr. #: RV-3028-C7 32.768kHz 1ppm TA QC Stock: 0 On Order: 76,900 Expected 4/23/2027 104,000 Expected 5/21/2027 Factory Lead-Time: 41 Weeks	Cut Tape ¥400.3 ¥297.3 ¥272.4 ¥244.2 View Reel ¥220.9 ¥229.2 ¥225.9 ¥220.9 MouseReel Available	Min.: 1 Mult.: 1 : 1,000	I2C	YY-MM-DD-dd	HH:MM:SS (24 hr)		Backup Switching	1.2 V	5.5 V	- 40 C	+ 85 C	RV-3028	SMD/SMT	45 nA	Reel, Cut Tape, MouseReel
Real Time Clock 32.768kHz I2C Time Acc. 1ppm RV-3028-C7 32.768kHz 1ppm TA QA Micro Crystal 1: ¥430.2 69,293On Order	Mfr. Part # RV-3028-C7 32.768kHz 1ppm TA QA Mouser Part # 428-203603-MG01	Micro Crystal	Real Time Clock 32.768kHz I2C Time Acc. 1ppm Learn More about Micro Crystal rv 3028 c7	Datasheet	69,293On Order On Order Ship Dates Mfr. #: RV-3028-C7 32.768kHz 1ppm TA QA Stock: 0 On Order: 2,293 Expected 4/16/2027 21,000 Expected 5/14/2027 18,000 Expected 5/28/2027 28,000 Expected 6/28/2027 Factory Lead-Time: 37 Weeks	Cut Tape ¥430.2 ¥318.9 ¥292.3 ¥260.8 View Reel ¥232.5 ¥247.5 ¥239.2 ¥232.5 MouseReel Available	Min.: 1 Mult.: 1 : 1,000	I2C	YY-MM-DD-dd	HH:MM:SS (24 hr)		Backup Switching	1.2 V	5.5 V	- 40 C	+ 85 C	RV-3028	SMD/SMT	45 nA	Reel, Cut Tape, MouseReel
Real Time Clock 32.768kHz I2C Time Acc. 6ppm AEC RV-3129-C3 32.768kHz OPTION A TB QA Micro Crystal 1: ¥770.7 18,738On Order	Mfr. Part # RV-3129-C3 32.768kHz OPTION A TB QA Mouser Part # 428-203618-MG01	Micro Crystal	Real Time Clock 32.768kHz I2C Time Acc. 6ppm AEC Learn More about Micro Crystal real time clock modules	Datasheet	18,738On Order On Order Ship Dates Mfr. #: RV-3129-C3 32.768kHz OPTION A TB QA Stock: 0 On Order: 2,738 Expected 6/18/2027 16,000 Expected 7/23/2027 Factory Lead-Time: 45 Weeks	Cut Tape ¥770.7 ¥581.4 ¥534.8 ¥483.4 View Reel ¥421.9 ¥458.4 ¥453.5 ¥421.9 MouseReel Available	Min.: 1 Mult.: 1 : 1,000	I2C	YY-MM-DD-dd	HH:MM:SS (24 hr)		Backup Switching	1.3 V	5.5 V	- 40 C	+ 125 C	RV-3129	SMD/SMT	800 nA	Reel, Cut Tape, MouseReel
Real Time Clock 32.768kHz I2C Time Acc. 6ppm RV-3129-C3 32.768kHz OPTION A TA QC Micro Crystal 1: ¥719.2 6,643On Order	Mfr. Part # RV-3129-C3 32.768kHz OPTION A TA QC Mouser Part # 428-203688-MG01	Micro Crystal	Real Time Clock 32.768kHz I2C Time Acc. 6ppm Learn More about Micro Crystal real time clock modules	Datasheet	6,643On Order On Order Ship Dates Mfr. #: RV-3129-C3 32.768kHz OPTION A TA QC Stock: 0 On Order: 1,643 Expected 11/6/2026 5,000 Expected 4/30/2027 Factory Lead-Time: 29 Weeks	Cut Tape ¥719.2 ¥541.5 ¥498.3 ¥448.5 ¥426.9 Reel ¥426.9 MouseReel Available	Min.: 1 Mult.: 1 : 1,000	I2C	YY-MM-DD-dd	HH:MM:SS (24 hr)		Backup Switching	1.3 V	5.5 V	- 40 C	+ 85 C	RV-3129	SMD/SMT	800 nA	Reel, Cut Tape, MouseReel
Real Time Clock 32.768kHz I2C 20ppm 2.0x1.2x0.6 AEC-Q200 RV-3028-C8-32.768kHz-1PPM-TA-QA Micro Crystal 1: ¥503.3 1,324On Order New Product	Mfr. Part # RV-3028-C8-32.768kHz-1PPM-TA-QA Mouser Part # 428-RV3028C81PPMTAQA New Product	Micro Crystal	Real Time Clock 32.768kHz I2C 20ppm 2.0x1.2x0.6 AEC-Q200 Learn More about Micro Crystal rv 3028 c8 rtc modules	Datasheet	1,324On Order On Order Ship Dates Mfr. #: RV-3028-C8-32.768kHz-1PPM-TA-QA Stock: 0 On Order: 324 Expected 11/27/2026 1,000 Expected 1/8/2027 Factory Lead-Time: 11 Weeks	Cut Tape ¥503.3 ¥375.4 ¥342.2 ¥307.3 Reel ¥292.3 View ¥292.3 ¥270.7 ¥267.4 MouseReel Available	Min.: 1 Mult.: 1 : 1,000	I2C	YY-MM-DD-dd	HH:MM:SS (24 hr)	SON-8	Backup Switching	1.1 V	5.5 V	- 40 C	+ 85 C	RV-3028-C8	SMD/SMT	70 nA	Reel, Cut Tape, MouseReel
Real Time Clock 32.768kHz I2C 20ppm 2.0x1.2x0.6mm RV-3028-C8-32.768kHz-1PPM-TA-QC Micro Crystal 1: ¥481.7 5,985On Order New Product	Mfr. Part # RV-3028-C8-32.768kHz-1PPM-TA-QC Mouser Part # 428-RV3028C81PPMTAQC New Product	Micro Crystal	Real Time Clock 32.768kHz I2C 20ppm 2.0x1.2x0.6mm Learn More about Micro Crystal rv 3028 c8 rtc modules	Datasheet	5,985On Order On Order Ship Dates Mfr. #: RV-3028-C8-32.768kHz-1PPM-TA-QC Stock: 0 On Order: 2,985 Expected 2/9/2027 1,000 Expected 2/12/2027 2,000 Expected 2/26/2027 Factory Lead-Time: 15 Weeks	Cut Tape ¥481.7 ¥358.8 ¥328.9 ¥295.7 Reel ¥262.4 View ¥279 ¥270.7 ¥257.5 ¥255.8 MouseReel Available	Min.: 1 Mult.: 1 : 1,000	I2C	YY-MM-DD-dd	HH:MM:SS (24 hr)	SON-8	Backup Switching	1.1 V	5.5 V	- 40 C	+ 85 C	RV-3028-C8	SMD/SMT	70 nA	Reel, Cut Tape, MouseReel
Real Time Clock 32.768kHz, 20PPM, Real-Time Clock Module with SPI-Bus RV-8063-C8 32.768kHz-20PPM-TA-QC Micro Crystal 1: ¥250.8 1,000Expected 2/5/2027	Mfr. Part # RV-8063-C8 32.768kHz-20PPM-TA-QC Mouser Part # 428-204233-MC01	Micro Crystal	Real Time Clock 32.768kHz, 20PPM, Real-Time Clock Module with SPI-Bus Learn More about Micro Crystal rv 8063 c8 rtc modules	Datasheet	1,000Expected 2/5/2027	Cut Tape ¥250.8 ¥184.4 ¥164.6 ¥146 Reel ¥131.9 View ¥137.2 ¥135.9 ¥125.4 ¥122.7 MouseReel Available	Min.: 1 Mult.: 1 : 1,000	SPI	YY-MM-DD-dd	HH:MM:SS:hh (12 hr, 24 hr)	SON-8		900 mV	5.5 V	- 40 C	+ 85 C	RV-8063-C8	SMD/SMT	190 nA	Reel, Cut Tape, MouseReel

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Real-Time Clock (RTC) Modules

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