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Real Time Clock

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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	Qualification	Packaging
Real Time Clock Serial SPI bus RTC M41T93ZMY6F STMicroelectronics 1: ¥1,772.3 757In Stock	Mfr. Part # M41T93ZMY6F Mouser Part # 511-M41T93ZMY6F	STMicroelectronics	Real Time Clock Serial SPI bus RTC	Datasheet	757In Stock	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	2.38 V	5.5 V	- 40 C	+ 85 C	M41T93	SMD/SMT		Reel, Cut Tape, MouseReel
Real Time Clock Serial 512 (64x8) M41T94MH6F STMicroelectronics 1: ¥1,842 1,226In Stock 1,872Expected 10/13/2026	Mfr. Part # M41T94MH6F Mouser Part # 511-M41T94MH6F	STMicroelectronics	Real Time Clock Serial 512 (64x8)	Datasheet	1,226In Stock 1,872Expected 10/13/2026	Cut Tape ¥1,842 ¥1,455 ¥1,353.7 ¥1,242.4 Reel ¥1,089.6 View ¥1,204.2 ¥1,132.8 ¥1,054.7 MouseReel Available	Min.: 1 Mult.: 1 : 936	SPI	YY-MM-DD-dd	HH:MM:SS:hh (12 hr, 24 hr)	64 B	SOX-28	Backup Switching	2.7 V	5.5 V	- 40 C	+ 85 C	M41T94	SMD/SMT		Reel, Cut Tape, MouseReel
Real Time Clock Serial 512 (64x8) M41T94MQ6F STMicroelectronics 1: ¥906.9 2,959In Stock 5,000Expected 4/28/2027	Mfr. Part # M41T94MQ6F Mouser Part # 511-M41T94MQ6F	STMicroelectronics	Real Time Clock Serial 512 (64x8)	Datasheet	2,959In Stock 5,000Expected 4/28/2027	Cut Tape ¥906.9 ¥674.4 ¥621.2 ¥563.1 View Reel ¥496.6 ¥536.5 ¥519.9 ¥513.2 ¥496.6 MouseReel Available	Min.: 1 Mult.: 1 : 2,500	Serial	YY-MM-DD-dd	HH:MM:SS:hh (12 hr, 24 hr)	64 B	SO-16	Backup Switching	2.7 V	5.5 V	- 40 C	+ 85 C	M41T94	SMD/SMT		Reel, Cut Tape, MouseReel
Real Time Clock 16K (2Kx8) 150ns M48T02-150PC1 STMicroelectronics 1: ¥5,198.9 641In Stock	Mfr. Part # M48T02-150PC1 Mouser Part # 511-M48T0215PC1	STMicroelectronics	Real Time Clock 16K (2Kx8) 150ns	Datasheet	641In Stock	¥5,198.9 ¥4,132.6 ¥3,778.8 ¥3,579.5 ¥3,443.3	Min.: 1 Mult.: 1	Parallel	YY-MM-DD-dd	HH:MM:SS (24 hr)	2 kB	PCDIP-24	Integrated Battery	4.75 V	5.5 V	0 C	+ 70 C	M48T02	Through Hole		Tube
Real Time Clock 16K (2Kx8) 70ns M48T02-70PC1 STMicroelectronics 1: ¥4,978 443In Stock	Mfr. Part # M48T02-70PC1 Mouser Part # 511-M48T0270PC1	STMicroelectronics	Real Time Clock 16K (2Kx8) 70ns	Datasheet	443In Stock	¥4,978 ¥3,953.2 ¥3,730.6 ¥3,463.2 View ¥3,341.9 ¥3,224 Quote	Min.: 1 Mult.: 1	Parallel	YY-MM-DD-dd	HH:MM:SS (24 hr)	2 kB	PCDIP-24	Integrated Battery	4.75 V	5.5 V	0 C	+ 70 C	M48T02	Through Hole		Tube
Real Time Clock 64K (8Kx8) 150ns M48T08-150PC1 STMicroelectronics 1: ¥6,494.5 339In Stock 240Expected 10/27/2026	Mfr. Part # M48T08-150PC1 Mouser Part # 511-M48T0815PC1	STMicroelectronics	Real Time Clock 64K (8Kx8) 150ns	Datasheet	339In Stock 240Expected 10/27/2026	¥6,494.5 ¥5,233.8 ¥4,913.2 ¥4,740.5 View ¥4,411.6 Quote	Min.: 1 Mult.: 1	Parallel	YY-MM-DD-dd	HH:MM:SS (24 hr)	8 kB	PCDIP-28	Integrated Battery	4.75 V	5.5 V	0 C	+ 70 C	M48T08	Through Hole		Tube
Real Time Clock 16K (2Kx8) 150ns M48T12-150PC1 STMicroelectronics 1: ¥7,321.7 386In Stock 560Expected 10/13/2026	Mfr. Part # M48T12-150PC1 Mouser Part # 511-M48T1215PC1	STMicroelectronics	Real Time Clock 16K (2Kx8) 150ns	Datasheet	386In Stock 560Expected 10/13/2026	¥7,321.7 ¥5,913.2 ¥5,632.5 ¥5,459.7 View ¥5,247.1 Quote	Min.: 1 Mult.: 1	Parallel	YY-MM-DD-dd	HH:MM:SS (24 hr)	8 kB	PCDIP-24	Integrated Battery	4.5 V	5.5 V	0 C	+ 70 C	M48T12	Through Hole		Tube
Real Time Clock 256K (32Kx8) 70ns M48T35-70PC1 STMicroelectronics 1: ¥9,074 239In Stock	Mfr. Part # M48T35-70PC1 Mouser Part # 511-M48T3570PC1	STMicroelectronics	Real Time Clock 256K (32Kx8) 70ns	Datasheet	239In Stock	¥9,074 ¥7,383.1 ¥6,933 ¥6,541 View ¥6,537.7 Quote	Min.: 1 Mult.: 1	Parallel	YY-MM-DD-dd	HH:MM:SS (24 hr)	32 kB	PCDIP-28	Integrated Battery	4.75 V	5.5 V	0 C	+ 70 C	M48T35	Through Hole		Tube
Real Time Clock 256K (32Kx8) 70ns M48T35Y-70MH1F STMicroelectronics 1: ¥4,019.6 520In Stock	Mfr. Part # M48T35Y-70MH1F Mouser Part # 511-M48T35Y-70MH1F	STMicroelectronics	Real Time Clock 256K (32Kx8) 70ns	Datasheet	520In Stock	Cut Tape ¥4,019.6 ¥3,219 ¥3,018 ¥2,798.8 View Reel ¥2,567.9 ¥2,739 ¥2,569.6 ¥2,567.9 Quote MouseReel Available	Min.: 1 Mult.: 1 : 936	Parallel	YY-MM-DD-dd	HH:MM:SS (24 hr)	256 kB	SOX-28	Backup Switching	4.5 V	5.5 V	0 C	+ 70 C	M48T35Y	SMD/SMT		Reel, Cut Tape, MouseReel
Real Time Clock 64K (8Kx8) 70ns M48T58-70PC1 STMicroelectronics 1: ¥7,949.5 191In Stock	Mfr. Part # M48T58-70PC1 Mouser Part # 511-M48T5870PC1	STMicroelectronics	Real Time Clock 64K (8Kx8) 70ns	Datasheet	191In Stock	¥7,949.5 ¥6,467.9 ¥6,077.6 ¥5,944.7 View ¥5,592.6 Quote	Min.: 1 Mult.: 1	Parallel	YY-MM-DD-dd	HH:MM:SS (24 hr)	8 kB	PCDIP-28	Integrated Battery	4.75 V	5.5 V	0 C	+ 70 C	M48T58	Through Hole		Tube
Real Time Clock 64K (8Kx8) 70ns M48T58Y-70PC1 STMicroelectronics 1: ¥6,247 180In Stock 240Expected 10/2/2026	Mfr. Part # M48T58Y-70PC1 Mouser Part # 511-M48T58Y70PC1	STMicroelectronics	Real Time Clock 64K (8Kx8) 70ns	Datasheet	180In Stock 240Expected 10/2/2026	¥6,247 ¥5,039.5 ¥4,730.5 ¥4,458.1 View ¥4,297 Quote	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	M48T58Y	Through Hole		Tube
Real Time Clock I2C GP RTCC 64B SRAM MCP7940NT-I/MNY Microchip Technology 1: ¥167.8 9,738In Stock	Mfr. Part # MCP7940NT-I/MNY Mouser Part # 579-MCP7940NT-I/MNY	Microchip Technology	Real Time Clock I2C GP RTCC 64B SRAM Learn More about Microchip Technology microchip mcp7940n calendar	Datasheet	9,738In Stock	Cut Tape ¥167.8 Reel ¥140.7 MouseReel Available	Min.: 1 Mult.: 1 : 3,300	Serial 2-Wire, I2C	YY-MM-DD-dd	HH:MM:SS:hh (12 hr, 24 hr)	64 B	TDFN-8	Backup Switching	1.8 V	5.5 V	- 40 C	+ 85 C		SMD/SMT		Reel, Cut Tape, MouseReel
Real Time Clock I2C GP RTCC 1Kb EE 64B SRAM EUI-48 MCP79411-I/SN Microchip Technology 1: ¥187.7 12,156In Stock	Mfr. Part # MCP79411-I/SN Mouser Part # 579-MCP79411ISN	Microchip Technology	Real Time Clock I2C GP RTCC 1Kb EE 64B SRAM EUI-48 Learn More about Microchip Technology microchip mcp794xx calendars	Datasheet	12,156In Stock	¥187.7 ¥174.4 ¥171.1	Min.: 1 Mult.: 1	I2C	YY-MM-DD-dd	HH:MM:SS:hh (12 hr, 24 hr)	64 B	SOIC-8	Backup Switching	1.8 V	5.5 V	- 40 C	+ 85 C		SMD/SMT		Tube
Real Time Clock I2C GP RTCC 1Kb EE 64B SRAM EUI-48 MCP79411T-I/MS Microchip Technology 1: ¥209.3 4,734In Stock	Mfr. Part # MCP79411T-I/MS Mouser Part # 579-MCP79411TIMS	Microchip Technology	Real Time Clock I2C GP RTCC 1Kb EE 64B SRAM EUI-48 Learn More about Microchip Technology microchip mcp794xx calendars	Datasheet	4,734In Stock	Cut Tape ¥209.3 Reel ¥176.1 MouseReel Available	Min.: 1 Mult.: 1 : 2,500	I2C	YY-MM-DD-dd	HH:MM:SS:hh (12 hr, 24 hr)	64 B	MSOP-8	Backup Switching	1.8 V	5.5 V	- 40 C	+ 85 C		SMD/SMT		Reel, Cut Tape, MouseReel
Real Time Clock I2C GP RTCC 1Kb EE 64B SRAM EUI-48 MCP79411T-I/SN Microchip Technology 1: ¥204.3 5,564In Stock	Mfr. Part # MCP79411T-I/SN Mouser Part # 579-MCP79411TISN	Microchip Technology	Real Time Clock I2C GP RTCC 1Kb EE 64B SRAM EUI-48 Learn More about Microchip Technology microchip mcp794xx calendars	Datasheet	5,564In Stock	Cut Tape ¥204.3 Reel ¥171.1 MouseReel Available	Min.: 1 Mult.: 1 : 3,300	I2C	YY-MM-DD-dd	HH:MM:SS:hh (12 hr, 24 hr)	64 B	SOIC-8	Backup Switching	1.8 V	5.5 V	- 40 C	+ 85 C		SMD/SMT		Reel, Cut Tape, MouseReel
Real Time Clock SPI GP RTCC 2Kb EE 64B SRAM ID MCP79520T-I/MS Microchip Technology 1: ¥247.5 2,515In Stock	Mfr. Part # MCP79520T-I/MS Mouser Part # 579-MCP79520T-I/MS	Microchip Technology	Real Time Clock SPI GP RTCC 2Kb EE 64B SRAM ID Learn More about Microchip Technology microchip mcp795xx	Datasheet	2,515In Stock	Cut Tape ¥247.5 Reel ¥207.6 MouseReel Available	Min.: 1 Mult.: 1 : 2,500	Serial, I2C, SPI	YY-MM-DD-dd	HH:MM:SS:hh (12 hr, 24 hr)	64 B		Backup Switching	1.8 V	3.6 V	- 40 C	+ 85 C		SMD/SMT		Reel, Cut Tape, MouseReel
Real Time Clock Serial RTC A 595-BQ3 2000D A 595-BQ32000 A 595-BQ32000D BQ32000DR Texas Instruments 1: ¥385.4 3,730In Stock 5,000Expected 2/1/2027	Mfr. Part # BQ32000DR Mouser Part # 595-BQ32000DR	Texas Instruments	Real Time Clock Serial RTC A 595-BQ3 2000D A 595-BQ32000 A 595-BQ32000D	Datasheet	3,730In Stock 5,000Expected 2/1/2027	Cut Tape ¥385.4 ¥284 ¥259.1 ¥230.9 Reel ¥197.7 View ¥217.6 ¥210.9 ¥204.3 ¥192.7 MouseReel Available	Min.: 1 Mult.: 1 : 2,500	I2C	YY-MM-DD-dd	HH:MM:SS:hh (12 hr, 24 hr)		SOIC-8	Backup Switching	3 V	3.6 V	- 40 C	+ 85 C	BQ32000	SMD/SMT		Reel, Cut Tape, MouseReel
Real Time Clock 2-wire Real Time Clock S-35390A-I8T1U ABLIC 1: ¥307.3 2,851In Stock	Mfr. Part # S-35390A-I8T1U Mouser Part # 628-S-35390A-I8T1U	ABLIC	Real Time Clock 2-wire Real Time Clock Learn More about ABLIC seiko s 35390a clocks	Datasheet	2,851In Stock	Cut Tape ¥307.3 ¥225.9 ¥206 ¥182.7 View Reel ¥149.2 ¥172.7 ¥163.6 ¥162.8 ¥157.1 ¥149.2 MouseReel Available	Min.: 1 Mult.: 1 : 5,000	Serial 2-Wire, I2C	YY-MM-DD-dd	HH:MM:SS:hh (12 hr, 24 hr)	7 B	SNT-A-8	No Backup Switching	1.3 V	5.5 V	- 40 C	+ 85 C	S-35390	SMD/SMT		Reel, Cut Tape, MouseReel
Real Time Clock Real Time Clock S-35390A-J8T1U ABLIC 1: ¥307.3 2,610In Stock	Mfr. Part # S-35390A-J8T1U Mouser Part # 628-S-35390A-J8T1U	ABLIC	Real Time Clock Real Time Clock Learn More about ABLIC seiko s 35390a clocks	Datasheet	2,610In Stock	Cut Tape ¥307.3 ¥225.9 ¥206 ¥182.7 View Reel ¥150.8 ¥172.7 ¥163.6 ¥162.8 ¥157.1 ¥150.8	Min.: 1 Mult.: 1 : 4,000	Serial 2-Wire, I2C	YY-MM-DD-dd	HH:MM:SS:hh (12 hr, 24 hr)	7 B	SOP-8	No Backup Switching	1.3 V	5.5 V	- 40 C	+ 85 C	S-35390	SMD/SMT		Reel, Cut Tape
Real Time Clock Real Time Clock S-35390A-T8T1U ABLIC 1: ¥307.3 2,586In Stock	Mfr. Part # S-35390A-T8T1U Mouser Part # 628-S-35390A-T8T1U	ABLIC	Real Time Clock Real Time Clock Learn More about ABLIC seiko s 35390a clocks	Datasheet	2,586In Stock	Cut Tape ¥307.3 ¥225.9 ¥206 ¥182.7 View Reel ¥141.7 ¥172.7 ¥163.6 ¥162.8 ¥157.1 ¥141.7 MouseReel Available	Min.: 1 Mult.: 1 : 4,000	Serial 2-Wire, I2C	YY-MM-DD-dd	HH:MM:SS:hh (12 hr, 24 hr)	7 B	TSSOP-8	No Backup Switching	1.3 V	5.5 V	- 40 C	+ 85 C	S-35390	SMD/SMT		Reel, Cut Tape, MouseReel
Real Time Clock Automotive RTC IC with 400 kHz I2C interface in TSSOP8 package. PCA85073ADP/Q900Z NXP Semiconductors 1: ¥274.1 8,904In Stock 32,500On Order	Mfr. Part # PCA85073ADP/Q900Z Mouser Part # 771-PCA85073ADPQ900Z	NXP Semiconductors	Real Time Clock Automotive RTC IC with 400 kHz I2C interface in TSSOP8 package. Learn More about NXP Semiconductors nxp pca85073a cmos rtc	Datasheet	8,904In Stock 32,500On Order On Order Ship Dates Mfr. #: PCA85073ADP/Q900Z Stock: 8,904 Can Ship Immediately On Order: 17,500 Expected 1/11/2027 15,000 Expected 3/15/2027 Factory Lead-Time: 27 Weeks	Cut Tape ¥274.1 ¥199.3 ¥181 ¥159.5 Reel ¥133 View ¥149.8 ¥143.8 ¥142.2 ¥131.4 MouseReel Available	Min.: 1 Mult.: 1 : 2,500	Serial 2-Wire, I2C	YY-MM-DD-dd	HH:MM:SS (24 hr)		TSSOP-8	No Backup Switching	900 mV	5.5 V	- 40 C	+ 105 C	PCA85073A	SMD/SMT	AEC-Q100	Reel, Cut Tape, MouseReel
Real Time Clock RTC IC with 400 kHz I2C interface in TSSOP8 package. PCF85063ATT/AJ NXP Semiconductors 1: ¥161.1 8,546In Stock 27,500On Order	Mfr. Part # PCF85063ATT/AJ Mouser Part # 771-PCF85063ATT/AJ	NXP Semiconductors	Real Time Clock RTC IC with 400 kHz I2C interface in TSSOP8 package. Learn More about NXP Semiconductors nxp pcf85063 clocks	Datasheet	8,546In Stock 27,500On Order On Order Ship Dates Mfr. #: PCF85063ATT/AJ Stock: 8,546 Can Ship Immediately On Order: 12,500 Expected 3/26/2027 15,000 Expected 3/29/2027 Factory Lead-Time: 27 Weeks	Cut Tape ¥161.1 ¥112.9 ¥101.3 ¥89.9 Reel ¥75.6 View ¥83.7 ¥80.1 ¥78.7 ¥73.7 MouseReel Available	Min.: 1 Mult.: 1 : 2,500	I2C	YY-MM-DD-dd	HH:MM:SS:hh (12 hr, 24 hr)		TSSOP-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 SPI Interface in HXSON10 package. PCF85063BTL/1,118 NXP Semiconductors 1: ¥132.9 5,377In Stock 8,000Expected 10/12/2026	Mfr. Part # PCF85063BTL/1,118 Mouser Part # 771-PCF85063BTL1118	NXP Semiconductors	Real Time Clock RTC IC with 400 kHz SPI Interface in HXSON10 package. Learn More about NXP Semiconductors nxp pcf85063 clocks	Datasheet	5,377In Stock 8,000Expected 10/12/2026	Cut Tape ¥132.9 ¥96.2 ¥87.2 ¥79.6 View Reel ¥63.3 ¥74.1 ¥70.8 ¥68.8 ¥67.1 ¥63.3 MouseReel Available	Min.: 1 Mult.: 1 : 4,000	SPI	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	PCF85063B	SMD/SMT		Reel, Cut Tape, MouseReel
Real Time Clock RTC IC with 400 kHz I2C interface featuring backup battery switch-over function in TSSOP8 package. PCF85263ATT/AJ NXP Semiconductors 1: ¥230.9 3,992In Stock 40,000On Order	Mfr. Part # PCF85263ATT/AJ Mouser Part # 771-PCF85263ATT/AJ	NXP Semiconductors	Real Time Clock RTC IC with 400 kHz I2C interface featuring backup battery switch-over function in TSSOP8 package. Learn More about NXP Semiconductors nxp pcf85263a rtc	Datasheet	3,992In Stock 40,000On Order On Order Ship Dates Mfr. #: PCF85263ATT/AJ Stock: 3,992 Can Ship Immediately On Order: 20,000 Expected 4/5/2027 20,000 Expected 4/12/2027 Factory Lead-Time: 27 Weeks	Cut Tape ¥230.9 ¥167.8 ¥151.3 ¥133.7 Reel ¥111.6 View ¥125.4 ¥120.3 ¥114.9 ¥109 MouseReel Available	Min.: 1 Mult.: 1 : 2,500	I2C	YY-MM-DD-dd	HH:MM:SS:hh (12 hr, 24 hr)		TSSOP-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 TSSOP10 package. PCF85263ATT1/AZ NXP Semiconductors 1: ¥240.8 5,642In Stock 7,500Expected 11/30/2026	Mfr. Part # PCF85263ATT1/AZ Mouser Part # 771-PCF85263ATT1/AZ	NXP Semiconductors	Real Time Clock RTC IC with 400 kHz I2C interface featuring backup battery switch-over function in TSSOP10 package. Learn More about NXP Semiconductors nxp pcf85263a rtc	Datasheet	5,642In Stock 7,500Expected 11/30/2026	Cut Tape ¥240.8 ¥176.1 ¥158.6 ¥140.2 Reel ¥118.6 View ¥131.4 ¥126.1 ¥121.8 ¥114.6 MouseReel Available	Min.: 1 Mult.: 1 : 2,500	Serial 2-Wire, I2C	YY-MM-DD-dd	HH:MM:SS:hh (12 hr, 24 hr)		TSSOP-10	Backup Switching	900 mV	5.5 V	- 40 C	+ 85 C	PCF85263A	SMD/SMT		Reel, Cut Tape, MouseReel