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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.	RTC Bus Interface	Date Format	Time Format	Memory Size	Package / Case	Battery Backup Switching	Supply Voltage - Min	Supply Voltage - Max	Minimum Operating Temperature	Maximum Operating Temperature	Series	Mounting Style	Packaging
Real Time Clock Built-In TXCO Real Time Clock Module with I2C Bus AB-RTC-TC-32.768kHz-2-T ABRACON 1: ¥609.6 2,049In Stock New Product	Mfr. Part # AB-RTC-TC-32.768kHz-2-T Mouser Part # 815-ABRTCTC32768K2T3 New Product	ABRACON	Real Time Clock Built-In TXCO Real Time Clock Module with I2C Bus Learn More about ABRACON ab rtc tx 32 modules	Datasheet	2,049In Stock	Cut Tape ¥609.6 ¥460.1 ¥421.9 ¥382 Reel ¥337.2 View ¥362.1 ¥350.5 ¥323.9 MouseReel Available	Min.: 1 Mult.: 1 : 1,300	I2C					Backup Switching	1.6 V	5.5 V	- 40 C	+ 85 C	AB-RTC-TC-32.768kHz-2	SMD/SMT	Reel, Cut Tape, MouseReel
Real Time Clock Built-In XO Real Time Clock Module with I2C Bus AB-RTC-XB-32.768kHz-2-T3 ABRACON 1: ¥440.2 1,968In Stock New Product	Mfr. Part # AB-RTC-XB-32.768kHz-2-T3 Mouser Part # 815-ABRTCXB32768K2T3 New Product	ABRACON	Real Time Clock Built-In XO Real Time Clock Module with I2C Bus Learn More about ABRACON ab rtc xb 32 module	Datasheet	1,968In Stock	Cut Tape ¥440.2 ¥327.2 ¥299 ¥267.4 Reel ¥239.2 View ¥254.1 ¥244.2 ¥240.8 ¥235.9 MouseReel Available	Min.: 1 Mult.: 1 : 3,000	I2C					Backup Switching	1.2 V	5.5 V	- 40 C	+ 85 C	AB-RTC-XB-32.768kHz-2	SMD/SMT	Reel, Cut Tape, MouseReel
Real Time Clock 32.768kHz I2C 20ppm 2.0x1.2x0.7mm RV-8263-C8 32.768kHz-20PPM-TA-QC Micro Crystal 1: ¥250.8 4,421In Stock	Mfr. Part # RV-8263-C8 32.768kHz-20PPM-TA-QC Mouser Part # 428-204208-MC01	Micro Crystal	Real Time Clock 32.768kHz I2C 20ppm 2.0x1.2x0.7mm Learn More about Micro Crystal rv 8263 c8 rtc modules	Datasheet	4,421In Stock	Cut Tape ¥250.8 ¥184.4 ¥164.6 ¥146 Reel ¥131.6 View ¥137.2 ¥131.7 ¥124.4 MouseReel Available	Min.: 1 Mult.: 1 : 1,000	I2C	YY-MM-DD-dd	HH:MM:SS:hh (12 hr, 24 hr)		SON-8		900 mV	5.5 V	- 40 C	+ 85 C	RV-8263-C8	SMD/SMT	Reel, Cut Tape, MouseReel
Real Time Clock 32.768kHz I2C 2.5ppm 3.2x1.5x0.8mm Temperature Sensor & Real Time Clock RV-3032-C7 32.768kHz-2.5PPM-TA-QC Micro Crystal 1: ¥549.8 18,820In Stock 36,000Expected 11/4/2026	Mfr. Part # RV-3032-C7 32.768kHz-2.5PPM-TA-QC Mouser Part # 428-203803-MG01	Micro Crystal	Real Time Clock 32.768kHz I2C 2.5ppm 3.2x1.5x0.8mm Temperature Sensor & Real Time Clock Learn More about Micro Crystal rv 3032 c7 rtc module	Datasheet	18,820In Stock 36,000Expected 11/4/2026	Cut Tape ¥549.8 ¥411.9 ¥378.7 ¥340.5 Reel ¥310.6 View ¥322.2 ¥315.6 ¥305.6 ¥277.4 MouseReel Available	Min.: 1 Mult.: 1 : 1,000	Serial 2-Wire, I2C	YY-MM-DD-dd	HH:MM:SS:hh (12 hr, 24 hr)	16 B		Backup Switching	1.3 V	5.5 V	- 40 C	+ 105 C	RV-3032-C7	SMD/SMT	Reel, Cut Tape, MouseReel
Real Time Clock 32.768 KHZ IC RTC CLK AB-RTCMC-32.768kHz-EOA9-S3-DBT ABRACON 1: ¥1,408.5 3,378In Stock	Mfr. Part # AB-RTCMC-32.768kHz-EOA9-S3-DBT Mouser Part # 815-ABMC-327EOA9S3DB	ABRACON	Real Time Clock 32.768 KHZ IC RTC CLK Learn More about ABRACON Abracon ABRTC MC	Datasheet	3,378In Stock	Cut Tape ¥1,408.5 ¥1,091.3 ¥990 ¥916.9 Reel ¥825.5 View ¥877 ¥857.1 ¥795.6 MouseReel Available	Min.: 1 Mult.: 1 : 1,000	SPI	YY-MM-DD-dd	HH:MM:SS (24 hr)			Backup Switching	1.4 V	5.5 V	- 40 C	+ 125 C	AB-RTCMC	SMD/SMT	Reel, Cut Tape, MouseReel
Real Time Clock Trickle-Charge Timekeeping Chip DS1302ZN+T&R Analog Devices / Maxim Integrated 1: ¥1,066.4 4,691In Stock	Mfr. Part # DS1302ZN+T&R Mouser Part # 700-DS1302ZNT&R	Analog Devices / Maxim Integrated	Real Time Clock Trickle-Charge Timekeeping Chip Learn More about Analog Devices / Maxim Integrated maxim ds1302 timekeeping chip	Datasheet	4,691In Stock	Cut Tape ¥1,066.4 ¥817.2 ¥755.8 ¥687.7 ¥674.4 Reel ¥578 MouseReel Available	Min.: 1 Mult.: 1 Max.: 3,888 : 2,500	Serial 3-Wire	YY-MM-DD-dd	HH:MM:SS (24 hr)	31 B	SOIC-8	Backup Switching	2 V	5.5 V	- 40 C	+ 85 C	DS1302ZN	SMD/SMT	Reel, Cut Tape, MouseReel
Real Time Clock 64 x 8, Serial, I C Real-Time Clock DS1307Z+ Analog Devices / Maxim Integrated 1: ¥946.8 4,249In Stock	Mfr. Part # DS1307Z+ Mouser Part # 700-DS1307Z	Analog Devices / Maxim Integrated	Real Time Clock 64 x 8, Serial, I C Real-Time Clock Learn More about Analog Devices / Maxim Integrated maxim ds1307	Datasheet	4,249In Stock	¥946.8 ¥722.5 ¥667.7 ¥602.9 View ¥571.4 ¥554.8 ¥544.8 ¥539.8	Min.: 1 Mult.: 1 Max.: 3,399	I2C	YY-MM-DD	HH:MM:SS:hh (12 hr, 24 hr)	56 B	SOIC-8	Backup Switching	4.5 V	5.5 V	0 C	+ 70 C	DS1307Z	SMD/SMT	Tube
Real Time Clock 64 x 8, Serial, I C Real-Time Clock DS1307Z+T&R Analog Devices / Maxim Integrated 1: ¥971.7 10,949In Stock	Mfr. Part # DS1307Z+T&R Mouser Part # 700-DS1307ZT&R	Analog Devices / Maxim Integrated	Real Time Clock 64 x 8, Serial, I C Real-Time Clock Learn More about Analog Devices / Maxim Integrated maxim ds1307	Datasheet	10,949In Stock	Cut Tape ¥971.7 ¥740.8 ¥682.7 ¥619.6 ¥607.9 Reel ¥514.9 MouseReel Available	Min.: 1 Mult.: 1 Max.: 8,759 : 2,500	I2C	YY-MM-DD	HH:MM:SS:hh (12 hr, 24 hr)	56 B	SOIC-8	Backup Switching	4.5 V	5.5 V	0 C	+ 70 C	DS1307Z	SMD/SMT	Reel, Cut Tape, MouseReel
Real Time Clock I C RTC with Trickle Charger DS1340U-33+T&R Analog Devices / Maxim Integrated 1: ¥1,081.3 5,993In Stock	Mfr. Part # DS1340U-33+T&R Mouser Part # 700-DS1340U-33T&R	Analog Devices / Maxim Integrated	Real Time Clock I C RTC with Trickle Charger Learn More about Analog Devices / Maxim Integrated maximds1343	Datasheet	5,993In Stock	Cut Tape ¥1,081.3 ¥828.8 ¥765.7 ¥697.6 ¥679.3 Reel ¥596.3 MouseReel Available	Min.: 1 Mult.: 1 Max.: 4,866 : 3,000	Serial 2-Wire, I2C	YY-MM-DD-dd	HH:MM:SS (24 hr)		uSOP-8	Backup Switching	2.97 V	5.5 V	- 40 C	+ 85 C	DS1340U	SMD/SMT	Reel, Cut Tape, MouseReel
Real Time Clock Low-Voltage SPI/3-Wire RTCs with Trickle DS1394U-33+T&R Analog Devices / Maxim Integrated 1: ¥1,076.3 5,088In Stock	Mfr. Part # DS1394U-33+T&R Mouser Part # 700-DS1394U-33T&R	Analog Devices / Maxim Integrated	Real Time Clock Low-Voltage SPI/3-Wire RTCs with Trickle	Datasheet	5,088In Stock	Cut Tape ¥1,076.3 ¥823.9 ¥762.4 ¥692.6 View Reel ¥614.6 ¥659.4 ¥647.8 ¥644.5 ¥614.6 MouseReel Available	Min.: 1 Mult.: 1 Max.: 4,070 : 3,000	Serial 3-Wire, SPI	YY-MM-DD-dd	HH:MM:SS:hh (12 hr, 24 hr)		uSOP-10	Backup Switching	2.97 V	5.5 V	- 40 C	+ 85 C	DS1394U	SMD/SMT	Reel, Cut Tape, MouseReel
Real Time Clock Y2K-Compliant, Nonvolatile Timekeeping R DS1746-70+ Analog Devices / Maxim Integrated 1: ¥11,663.5 487In Stock	Mfr. Part # DS1746-70+ Mouser Part # 700-DS1746-70	Analog Devices / Maxim Integrated	Real Time Clock Y2K-Compliant, Nonvolatile Timekeeping R	Datasheet	487In Stock	¥11,663.5 ¥9,633.8 ¥9,125.5 ¥9,010.9 Quote Quote	Min.: 1 Mult.: 1 Max.: 389	Parallel	YY-MM-DD-dd	HH:MM:SS (24 hr)	128 kB	EDIP-32	Integrated Battery	4.5 V	5.5 V	0 C	+ 70 C	DS1746	Through Hole	Tube
Real Time Clock 5ppm, I C Real-Time Clock with SRAM DS3232MZ+TRL Analog Devices / Maxim Integrated 1: ¥2,332 5,111In Stock	Mfr. Part # DS3232MZ+TRL Mouser Part # 700-DS3232MZ+TRL	Analog Devices / Maxim Integrated	Real Time Clock 5ppm, I C Real-Time Clock with SRAM	Datasheet	5,111In Stock	Cut Tape ¥2,332 ¥1,832.1 ¥1,705.8 ¥1,569.6 View Reel ¥1,375.3 ¥1,544.7 ¥1,498.2 ¥1,480 ¥1,375.3 MouseReel Available	Min.: 1 Mult.: 1 Max.: 4,091 : 2,500	Serial 2-Wire, I2C	YY-MM-DD-dd	HH:MM:SS:hh (12 hr, 24 hr)	236 B	SO-8	Backup Switching	2.3 V	4.5 V	- 40 C	+ 85 C	DS3232MZ	SMD/SMT	Reel, Cut Tape, MouseReel
Real Time Clock Extremely Accurate I C RTC with Integrat DS3232SN#T&R Analog Devices / Maxim Integrated 1: ¥2,689.2 9,003In Stock	Mfr. Part # DS3232SN#T&R Mouser Part # 700-DS3232SN#T&R-	Analog Devices / Maxim Integrated	Real Time Clock Extremely Accurate I C RTC with Integrat	Datasheet	9,003In Stock	Cut Tape ¥2,689.2 ¥2,129.4 ¥1,984.9 ¥1,822.1 View Reel ¥1,659.3 ¥1,805.5 ¥1,699.2 ¥1,659.3 Quote MouseReel Available	Min.: 1 Mult.: 1 Max.: 7,197 : 1,000	I2C	YY-MM-DD-dd	HH:MM:SS:hh (12 hr, 24 hr)	236 B	SO-20	Backup Switching	2.3 V	5.5 V	- 40 C	+ 85 C	DS3232SN	SMD/SMT	Reel, Cut Tape, MouseReel
Real Time Clock Automotive high-spee d CMOS timer with i TLC3555QDRQ1 Texas Instruments 1: ¥179.4 4,853In Stock	Mfr. Part # TLC3555QDRQ1 Mouser Part # 595-TLC3555QDRQ1	Texas Instruments	Real Time Clock Automotive high-spee d CMOS timer with i Learn More about Texas Instruments ti tlc3555 q1 high speed cmos timer	Datasheet	4,853In Stock	Cut Tape ¥179.4 ¥127.9 ¥115.1 ¥101.3 View Reel ¥87.7 ¥94.7 ¥90.7 ¥87.7 ¥87.7 MouseReel Available	Min.: 1 Mult.: 1 Max.: 1,001 : 3,000					SOIC-8	No Backup Switching	1.5 V	18 V	- 40 C	+ 125 C	TLC3555	SMD/SMT	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: ¥441.8 15,472In Stock	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	15,472In Stock	Cut Tape ¥441.8 ¥328.9 ¥299 ¥269.1 Reel ¥235.9 View ¥254.1 ¥245.8 ¥230.9 ¥225.9 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	Reel, Cut Tape, MouseReel
Real Time Clock Serial I2C bus RTC M41T82ZM6F STMicroelectronics 1: ¥589.7 7,928In Stock	Mfr. Part # M41T82ZM6F Mouser Part # 511-M41T82ZM6F	STMicroelectronics	Real Time Clock Serial I2C bus RTC	Datasheet	7,928In Stock	Cut Tape ¥589.7 ¥443.5 ¥406.9 ¥365.4 Reel ¥322.2 View ¥345.5 ¥337.2 ¥327.2 ¥317.3 MouseReel Available	Min.: 1 Mult.: 1 : 2,500	Serial	YY-MM-DD-dd	HH:MM:SS:hh (12 hr, 24 hr)	32 B	SOIC-8	Backup Switching	2.38 V	5.5 V	- 40 C	+ 85 C	M41T82	SMD/SMT	Reel, Cut Tape, MouseReel
Real Time Clock Serial SPI bus RTC M41T93RMY6F STMicroelectronics 1: ¥1,772.3 2,229In Stock 4,000Expected 10/13/2026	Mfr. Part # M41T93RMY6F Mouser Part # 511-M41T93RMY6F	STMicroelectronics	Real Time Clock Serial SPI bus RTC	Datasheet	2,229In Stock 4,000Expected 10/13/2026	Cut Tape ¥1,772.3 ¥1,383.6 ¥1,287.3 ¥1,181 View Reel ¥1,071.3 ¥1,129.5 ¥1,117.9 ¥1,071.3 Quote MouseReel Available	Min.: 1 Mult.: 1 : 1,000	SPI	YY-MM-DD-dd	HH:MM:SS:hh (12 hr, 24 hr)	32 B	SOX-18	Backup Switching	2.7 V	5.5 V	- 40 C	+ 85 C	M41T93	SMD/SMT	Reel, Cut Tape, MouseReel
Real Time Clock 64K (8Kx8) 100ns M48T18-100PC1 STMicroelectronics 1: ¥7,800.1 907In Stock 480Expected 10/8/2026	Mfr. Part # M48T18-100PC1 Mouser Part # 511-M48T1810PC1	STMicroelectronics	Real Time Clock 64K (8Kx8) 100ns	Datasheet	907In Stock 480Expected 10/8/2026	¥7,800.1 ¥6,305.2 ¥5,918.1 ¥5,798.6	Min.: 1 Mult.: 1	Parallel	YY-MM-DD-dd	HH:MM:SS (24 hr)	8 kB	PCDIP-28	Integrated Battery	4.5 V	5.5 V	0 C	+ 70 C	M48T18	Through Hole	Tube
Real Time Clock 64K (8Kx8) 70ns M48T58Y-70MH1F STMicroelectronics 1: ¥3,886.7 1,040In Stock	Mfr. Part # M48T58Y-70MH1F Mouser Part # 511-M48T58Y-70MH1F	STMicroelectronics	Real Time Clock 64K (8Kx8) 70ns	Datasheet	1,040In Stock	Cut Tape ¥3,886.7 ¥3,107.7 ¥2,913.4 ¥2,699.1 View Reel ¥2,511.4 ¥2,614.4 ¥2,511.4 ¥2,511.4 Quote MouseReel Available	Min.: 1 Mult.: 1 : 936	Parallel	YY-MM-DD-dd	HH:MM:SS (24 hr)	64 kB	SOX-28	Backup Switching	4.5 V	5.5 V	0 C	+ 70 C	M48T58Y	SMD/SMT	Reel, Cut Tape, MouseReel
Real Time Clock RTC Module with I2C or SPI interface featuring backup battery switch-over function in HLSON16 package. PCF2131TFY NXP Semiconductors 1: ¥607.9 21,046In Stock 68,000On Order	Mfr. Part # PCF2131TFY Mouser Part # 771-PCF2131TFY	NXP Semiconductors	Real Time Clock RTC Module with I2C or SPI interface featuring backup battery switch-over function in HLSON16 package. Learn More about NXP Semiconductors nxp pcf2131 rtc	Datasheet	21,046In Stock 68,000On Order On Order Ship Dates Mfr. #: PCF2131TFY Stock: 21,046 Can Ship Immediately On Order: 36,000 Expected 11/9/2026 32,000 Expected 8/16/2027 Factory Lead-Time: 16 Weeks	Cut Tape ¥607.9 ¥458.4 ¥420.2 ¥378.7 View Reel ¥312.3 ¥357.1 ¥348.8 ¥338.8 ¥333.9 ¥312.3 MouseReel Available	Min.: 1 Mult.: 1 : 4,000	Serial, I2C, SPI	YY-MM-DD-dd	HH:MM:SS:hh (12 hr, 24 hr)			Backup Switching	1.2 V	5.5 V	- 40 C	+ 85 C	PCF2131	SMD/SMT	Reel, Cut Tape, MouseReel
Real Time Clock RTC IC with 400 kHz I2C interface in SO8 package. PCF85063AT/AY NXP Semiconductors 1: ¥149.5 50,539In Stock	Mfr. Part # PCF85063AT/AY Mouser Part # 771-PCF85063AT/AY	NXP Semiconductors	Real Time Clock RTC IC with 400 kHz I2C interface in SO8 package. Learn More about NXP Semiconductors nxp pcf85063 clocks	Datasheet	50,539In Stock	Cut Tape ¥149.5 ¥106.8 ¥96.2 ¥84.5 Reel ¥69.1 View ¥78.7 ¥75.2 ¥72.3 ¥67.3 MouseReel Available	Min.: 1 Mult.: 1 : 2,500	I2C	YY-MM-DD-dd	HH:MM:SS:hh (12 hr, 24 hr)		SOIC-8	No Backup Switching	900 mV	5.5 V	- 40 C	+ 85 C	PCF85063A	SMD/SMT	Reel, Cut Tape, MouseReel
Real Time Clock RTC IC with 400 kHz I2C interface in HXSON10 package. PCF85063ATL/1,118 NXP Semiconductors 1: ¥141.2 61,059In Stock	Mfr. Part # PCF85063ATL/1,118 Mouser Part # 771-PCF85063ATL1118	NXP Semiconductors	Real Time Clock RTC IC with 400 kHz I2C interface in HXSON10 package. Learn More about NXP Semiconductors nxp pcf85063 clocks	Datasheet	61,059In Stock	Cut Tape ¥141.2 ¥101 ¥91 ¥79.7 View Reel ¥62.3 ¥74.1 ¥70.8 ¥68.1 ¥66.8 ¥62.3 MouseReel Available	Min.: 1 Mult.: 1 : 4,000	I2C	YY-MM-DD-dd	HH:MM:SS:hh (12 hr, 24 hr)		DFN2626-10	No Backup Switching	900 mV	5.5 V	- 40 C	+ 85 C	PCF85063A	SMD/SMT	Reel, Cut Tape, MouseReel
Real Time Clock RTC IC with 400 kHz I2C interface featuring backup battery switch-over function in SO8 package. PCF85263AT/AJ NXP Semiconductors 1: ¥227.6 161,461In Stock	Mfr. Part # PCF85263AT/AJ Mouser Part # 771-PCF85263AT/AJ	NXP Semiconductors	Real Time Clock RTC IC with 400 kHz I2C interface featuring backup battery switch-over function in SO8 package. Learn More about NXP Semiconductors nxp pcf85263a rtc	Datasheet	161,461In Stock	Cut Tape ¥227.6 ¥169.4 ¥149 ¥131.7 Reel ¥111.6 View ¥123.6 ¥118.6 ¥114.9 ¥109 MouseReel Available	Min.: 1 Mult.: 1 : 2,500	Serial 2-Wire, I2C	YY-MM-DD-dd	HH:MM:SS:hh (12 hr, 24 hr)		SO-8	Backup Switching	900 mV	5.5 V	- 40 C	+ 85 C	PCF85263A	SMD/SMT	Reel, Cut Tape, MouseReel
Real Time Clock RTC IC with 400 kHz I2C interface featuring backup battery switch-over function in HXSON10 package. PCF85263ATL/AX NXP Semiconductors 1: ¥220.9 81,323In Stock	Mfr. Part # PCF85263ATL/AX Mouser Part # 771-PCF85263ATL/AX	NXP Semiconductors	Real Time Clock RTC IC with 400 kHz I2C interface featuring backup battery switch-over function in HXSON10 package. Learn More about NXP Semiconductors nxp pcf85263a rtc	Datasheet	81,323In Stock	Cut Tape ¥220.9 ¥158.6 ¥143.5 ¥126.9 View Reel ¥104.5 ¥118.9 ¥114.1 ¥110.3 ¥108.6 ¥104.5 MouseReel Available	Min.: 1 Mult.: 1 : 4,000	Serial 2-Wire, I2C	YY-MM-DD-dd	HH:MM:SS:hh (12 hr, 24 hr)		DFN2626-10	Backup Switching	900 mV	5.5 V	- 40 C	+ 85 C	PCF85263A	SMD/SMT	Reel, Cut Tape, MouseReel
Real Time Clock RTC IC with 400 kHz I2C interface in SO8 package. PCF8563T/5,518 NXP Semiconductors 1: ¥199.3 27,087In Stock 24,390Expected 10/21/2026	Mfr. Part # PCF8563T/5,518 Mouser Part # 771-PCF8563T/5518	NXP Semiconductors	Real Time Clock RTC IC with 400 kHz I2C interface in SO8 package.	Datasheet	27,087In Stock 24,390Expected 10/21/2026	Cut Tape ¥199.3 ¥154.8 ¥135.7 ¥121.9 Reel ¥103.5 View ¥114.3 ¥111.3 ¥107.6 ¥99.3 MouseReel Available	Min.: 1 Mult.: 1 : 2,500	I2C	YY-MM-DD-dd	HH:MM:SS (24 hr)		SOIC-8	No Backup Switching	1.8 V	5.5 V	- 40 C	+ 85 C	PCF8563	SMD/SMT	Reel, Cut Tape, MouseReel