Real Time Clock – Mouser Japan

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Real-Time Clocks

Microchip Real-Time Clocks are offered from basic low-cost devices to various mid-range devices. These highly integrated devices have a usable amount of non-volatile memory and a combination of features that are very effective when operating within a single battery-backed clock device. With I2C and SPI RTCCs, various applications can be supported with fewer features and lower performance.

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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	Package / Case	Battery Backup Switching	Supply Voltage - Min	Supply Voltage - Max	Minimum Operating Temperature	Maximum Operating Temperature	Mounting Style	Packaging
Real Time Clock I2C GP RTCC 1Kb EE 64B SRAM ID MCP79410-I/ST Microchip Technology 1: ¥179.4 934In Stock	Mfr. Part # MCP79410-I/ST Mouser Part # 579-MCP79410-I/ST	Microchip Technology	Real Time Clock I2C GP RTCC 1Kb EE 64B SRAM ID Learn More about Microchip Technology microchip mcp794xx calendars	Datasheet	934In Stock	¥179.4 ¥167.8 ¥164.1	Min.: 1 Mult.: 1	I2C	YY-MM-DD-dd	HH:MM:SS:hh (12 hr, 24 hr)	TSSOP-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 MCP79411-I/MS Microchip Technology 1: ¥196 711In Stock	Mfr. Part # MCP79411-I/MS Mouser Part # 579-MCP79411IMS	Microchip Technology	Real Time Clock I2C GP RTCC 1Kb EE 64B SRAM EUI-48 Learn More about Microchip Technology microchip mcp794xx calendars	Datasheet	711In Stock	¥196 ¥179.4 ¥176.1	Min.: 1 Mult.: 1	I2C	YY-MM-DD-dd	HH:MM:SS:hh (12 hr, 24 hr)	MSOP-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/MNY Microchip Technology 1: ¥217.6 18In Stock 13,200On Order	Mfr. Part # MCP79411T-I/MNY Mouser Part # 579-MCP79411TIMNY	Microchip Technology	Real Time Clock I2C GP RTCC 1Kb EE 64B SRAM EUI-48 Learn More about Microchip Technology microchip mcp794xx calendars	Datasheet	18In Stock 13,200On Order On Order Ship Dates Mfr. #: MCP79411T-I/MNY Stock: 18 Can Ship Immediately On Order: 6,600 Expected 1/21/2027 6,600 Expected 1/29/2027 Factory Lead-Time: 12 Weeks	Cut Tape ¥217.6 Reel ¥181 MouseReel Available	Min.: 1 Mult.: 1 : 3,300	I2C	YY-MM-DD-dd	HH:MM:SS (24 hr)	TDFN-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 1Kb EE 64B SRAM ID MCP79510-I/MS Microchip Technology 1: ¥214.3 844In Stock 1,500Expected 10/26/2026	Mfr. Part # MCP79510-I/MS Mouser Part # 579-MCP79510-I/MS	Microchip Technology	Real Time Clock SPI GP RTCC 1Kb EE 64B SRAM ID Learn More about Microchip Technology microchip mcp795xx	Datasheet	844In Stock 1,500Expected 10/26/2026	¥214.3 ¥199.3 ¥192.7	Min.: 1 Mult.: 1	SPI	YY-MM-DD-dd	HH:MM:SS:hh (12 hr, 24 hr)	MSOP-10	Backup Switching	1.8 V	3.6 V	- 40 C	+ 85 C	SMD/SMT	Tube
Real Time Clock SPI GP RTCC 1Kb EE 64B SRAM EUI-48 MCP79511-I/MS Microchip Technology 1: ¥230.9 544In Stock	Mfr. Part # MCP79511-I/MS Mouser Part # 579-MCP79511-I/MS	Microchip Technology	Real Time Clock SPI GP RTCC 1Kb EE 64B SRAM EUI-48 Learn More about Microchip Technology microchip mcp795xx	Datasheet	544In Stock	¥230.9 ¥212.6 ¥207.6	Min.: 1 Mult.: 1	SPI	YY-MM-DD-dd	HH:MM:SS:hh (12 hr, 24 hr)	MSOP-10	Backup Switching	1.8 V	3.6 V	- 40 C	+ 85 C	SMD/SMT	Tube
Real Time Clock SPI GP RTCC 1Kb EE 64B SRAM EUI-64 MCP79512-I/MS Microchip Technology 1: ¥230.9 609In Stock	Mfr. Part # MCP79512-I/MS Mouser Part # 579-MCP79512-I/MS	Microchip Technology	Real Time Clock SPI GP RTCC 1Kb EE 64B SRAM EUI-64 Learn More about Microchip Technology microchip mcp795xx	Datasheet	609In Stock	¥230.9 ¥212.6 ¥207.6	Min.: 1 Mult.: 1	SPI	YY-MM-DD-dd	HH:MM:SS:hh (12 hr, 24 hr)	MSOP-10	Backup Switching	1.8 V	3.6 V	- 40 C	+ 85 C	SMD/SMT	Tube
Real Time Clock 1Kb EE 64B SRAM WD TED ID MCP795W10-I/SL Microchip Technology 1: ¥290.7 438In Stock	Mfr. Part # MCP795W10-I/SL Mouser Part # 579-MCP795W10-I/SL	Microchip Technology	Real Time Clock 1Kb EE 64B SRAM WD TED ID Learn More about Microchip Technology microchip mcp795xx	Datasheet	438In Stock	¥290.7 ¥270.7 ¥262.4	Min.: 1 Mult.: 1	SPI	YY-MM-DD-dd	HH:MM:SS:hh (12 hr, 24 hr)	SOIC-14	Backup Switching	1.8 V	5.5 V	- 40 C	+ 85 C	SMD/SMT	Tube
Real Time Clock 1Kb EE 64B SRAM WD TED EUI-48 MCP795W11-I/ST Microchip Technology 1: ¥313.9 5In Stock 192Expected 10/2/2026	Mfr. Part # MCP795W11-I/ST Mouser Part # 579-MCP795W11-I/ST	Microchip Technology	Real Time Clock 1Kb EE 64B SRAM WD TED EUI-48 Learn More about Microchip Technology microchip mcp795xx	Datasheet	5In Stock 192Expected 10/2/2026	¥313.9 ¥290.7 ¥284	Min.: 1 Mult.: 1	SPI	YY-MM-DD-dd	HH:MM:SS:hh (12 hr, 24 hr)	TSSOP-14	Backup Switching	1.8 V	5.5 V	- 40 C	+ 85 C	SMD/SMT	Tube
Real Time Clock 2Kb EE 64B SRAM WD TED ID MCP795W20-I/SL Microchip Technology 1: ¥307.3 338In Stock	Mfr. Part # MCP795W20-I/SL Mouser Part # 579-MCP795W20-I/SL	Microchip Technology	Real Time Clock 2Kb EE 64B SRAM WD TED ID Learn More about Microchip Technology microchip mcp795xx	Datasheet	338In Stock	¥307.3 ¥284 ¥275.7	Min.: 1 Mult.: 1	SPI	YY-MM-DD-dd	HH:MM:SS:hh (12 hr, 24 hr)	SOIC-14	Backup Switching	1.8 V	5.5 V	- 40 C	+ 85 C	SMD/SMT	Tube
Real Time Clock 2Kb EE 64B SRAM WD TED ID MCP795W20-I/ST Microchip Technology 1: ¥313.9 192In Stock	Mfr. Part # MCP795W20-I/ST Mouser Part # 579-MCP795W20-I/ST	Microchip Technology	Real Time Clock 2Kb EE 64B SRAM WD TED ID Learn More about Microchip Technology microchip mcp795xx	Datasheet	192In Stock	¥313.9 ¥290.7 ¥284	Min.: 1 Mult.: 1	SPI	YY-MM-DD-dd	HH:MM:SS:hh (12 hr, 24 hr)	TSSOP-14	Backup Switching	1.8 V	5.5 V	- 40 C	+ 85 C	SMD/SMT	Tube
Real Time Clock 2Kb EE 64B SRAM WD TED EUI-48 MCP795W21-I/SL Microchip Technology 1: ¥322.2 270In Stock	Mfr. Part # MCP795W21-I/SL Mouser Part # 579-MCP795W21-I/SL	Microchip Technology	Real Time Clock 2Kb EE 64B SRAM WD TED EUI-48 Learn More about Microchip Technology microchip mcp795xx	Datasheet	270In Stock	¥322.2 ¥299 ¥292.3	Min.: 1 Mult.: 1	SPI	YY-MM-DD-dd	HH:MM:SS:hh (12 hr, 24 hr)	SOIC-14	Backup Switching	1.8 V	5.5 V	- 40 C	+ 85 C	SMD/SMT	Tube
Real Time Clock 2Kb EE 64B SRAM WD TED EUI-48 MCP795W21-I/ST Microchip Technology 1: ¥328.9 121In Stock	Mfr. Part # MCP795W21-I/ST Mouser Part # 579-MCP795W21-I/ST	Microchip Technology	Real Time Clock 2Kb EE 64B SRAM WD TED EUI-48 Learn More about Microchip Technology microchip mcp795xx	Datasheet	121In Stock	¥328.9 ¥305.6 ¥297.3	Min.: 1 Mult.: 1	SPI	YY-MM-DD-dd	HH:MM:SS:hh (12 hr, 24 hr)	TSSOP-14	Backup Switching	1.8 V	5.5 V	- 40 C	+ 85 C	SMD/SMT	Tube
Real Time Clock 2Kb EE 64B SRAM WD TED EUI-64 MCP795W22-I/SL Microchip Technology 1: ¥322.2 5In Stock	Mfr. Part # MCP795W22-I/SL Mouser Part # 579-MCP795W22-I/SL	Microchip Technology	Real Time Clock 2Kb EE 64B SRAM WD TED EUI-64 Learn More about Microchip Technology microchip mcp795xx	Datasheet	5In Stock	¥322.2 ¥299 ¥292.3	Min.: 1 Mult.: 1	SPI	YY-MM-DD-dd	HH:MM:SS:hh (12 hr, 24 hr)	SOIC-14	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 ID MCP79410T-I/MNY Microchip Technology 1: ¥204.3 6In Stock 3,300Expected 10/5/2026	Mfr. Part # MCP79410T-I/MNY Mouser Part # 579-MCP79410T-I/MNY	Microchip Technology	Real Time Clock I2C GP RTCC 1Kb EE 64B SRAM ID Learn More about Microchip Technology microchip mcp794xx calendars	Datasheet	6In Stock 3,300Expected 10/5/2026	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)	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/ST Microchip Technology 1: ¥196 608In Stock	Mfr. Part # MCP79411-I/ST Mouser Part # 579-MCP79411IST	Microchip Technology	Real Time Clock I2C GP RTCC 1Kb EE 64B SRAM EUI-48 Learn More about Microchip Technology microchip mcp794xx calendars	Datasheet	608In Stock	¥196 ¥179.4 ¥176.1	Min.: 1 Mult.: 1	I2C	YY-MM-DD-dd	HH:MM:SS:hh (12 hr, 24 hr)	TSSOP-8	Backup Switching	1.8 V	5.5 V	- 40 C	+ 85 C	SMD/SMT	Tube
Real Time Clock SPI GP RTCC 2Kb EE 64B SRAM ID MCP79520T-I/MN Microchip Technology 1: ¥247.5 2,905In Stock	Mfr. Part # MCP79520T-I/MN Mouser Part # 579-MCP79520T-I/MN	Microchip Technology	Real Time Clock SPI GP RTCC 2Kb EE 64B SRAM ID Learn More about Microchip Technology microchip mcp795xx	Datasheet	2,905In Stock	Cut Tape ¥247.5 Reel ¥207.6	Min.: 1 Mult.: 1 : 3,300											Reel, Cut Tape
Real Time Clock SPI GP RTCC 2Kb EE 64B SRAM EUI-48 MCP79521-I/MS Microchip Technology 1: ¥245.8 150In Stock	Mfr. Part # MCP79521-I/MS Mouser Part # 579-MCP79521-I/MS	Microchip Technology	Real Time Clock SPI GP RTCC 2Kb EE 64B SRAM EUI-48 Learn More about Microchip Technology microchip mcp795xx	Datasheet	150In Stock	¥245.8 ¥227.6 ¥222.6	Min.: 1 Mult.: 1	SPI	YY-MM-DD-dd	HH:MM:SS:hh (12 hr, 24 hr)	MSOP-10	Backup Switching	1.8 V	3.6 V	- 40 C	+ 85 C	SMD/SMT	Tube
Real Time Clock SPI GP RTCC 2Kb EE 64B SRAM EUI-48 MCP79521T-I/MS Microchip Technology 1: ¥265.8 730In Stock	Mfr. Part # MCP79521T-I/MS Mouser Part # 579-MCP79521T-I/MS	Microchip Technology	Real Time Clock SPI GP RTCC 2Kb EE 64B SRAM EUI-48 Learn More about Microchip Technology microchip mcp795xx	Datasheet	730In Stock	Cut Tape ¥265.8 Reel ¥222.6 MouseReel Available	Min.: 1 Mult.: 1 : 2,500	Serial, I2C, SPI	YY-MM-DD-dd	HH:MM:SS:hh (12 hr, 24 hr)		Backup Switching	1.8 V	3.6 V	- 40 C	+ 85 C	SMD/SMT	Reel, Cut Tape, MouseReel
Real Time Clock 1Kb EE 64B SRAM WD TED ID MCP795W10-I/ST Microchip Technology 1: ¥300.6 3,240On Order	Mfr. Part # MCP795W10-I/ST Mouser Part # 579-MCP795W10-I/ST	Microchip Technology	Real Time Clock 1Kb EE 64B SRAM WD TED ID Learn More about Microchip Technology microchip mcp795xx	Datasheet	3,240On Order On Order Ship Dates Mfr. #: MCP795W10-I/ST Stock: 0 On Order: 360 Expected 9/28/2026 2,880 Expected 10/6/2026 Factory Lead-Time: 11 Weeks	¥300.6 ¥275.7 ¥269.1	Min.: 1 Mult.: 1	SPI	YY-MM-DD-dd	HH:MM:SS:hh (12 hr, 24 hr)	TSSOP-14	Backup Switching	1.8 V	5.5 V	- 40 C	+ 85 C	SMD/SMT	Tube
Real Time Clock I2C GP RTCC 64B SRAM ID MCP79400T-I/MNY Microchip Technology 1: ¥184.4 Non-Stocked Lead-Time 12 Weeks	Mfr. Part # MCP79400T-I/MNY Mouser Part # 579-MCP79400TIMNY	Microchip Technology	Real Time Clock I2C GP RTCC 64B SRAM ID Learn More about Microchip Technology microchip mcp7940n calendar	Datasheet	Non-Stocked Lead-Time 12 Weeks	Cut Tape ¥184.4 Reel ¥153.5	Min.: 1 Mult.: 1 : 3,300											Reel, Cut Tape
Real Time Clock I2C GP RTCC 64B SRAM ID MCP79400T-I/ST Microchip Technology 2,500: ¥147 Non-Stocked Lead-Time 10 Weeks	Mfr. Part # MCP79400T-I/ST Mouser Part # 579-MCP79400TIST	Microchip Technology	Real Time Clock I2C GP RTCC 64B SRAM ID Learn More about Microchip Technology microchip mcp7940n calendar	Datasheet	Non-Stocked Lead-Time 10 Weeks	Reel ¥147	Min.: 2,500 Mult.: 2,500 : 2,500											Reel
Real Time Clock I2C GP RTCC 64B SRAM EUI-48 MCP79401T-I/MS Microchip Technology 2,500: ¥164.1 Non-Stocked Lead-Time 9 Weeks	Mfr. Part # MCP79401T-I/MS Mouser Part # 579-MCP79401TIMS	Microchip Technology	Real Time Clock I2C GP RTCC 64B SRAM EUI-48 Learn More about Microchip Technology microchip mcp7940n calendar	Datasheet	Non-Stocked Lead-Time 9 Weeks	Reel ¥164.1	Min.: 2,500 Mult.: 2,500 : 2,500											Reel
Real Time Clock I2C GP RTCC 64B SRAM EUI-48 MCP79401T-I/SN Microchip Technology 3,300: ¥153.5 Non-Stocked Lead-Time 10 Weeks	Mfr. Part # MCP79401T-I/SN Mouser Part # 579-MCP79401TISN	Microchip Technology	Real Time Clock I2C GP RTCC 64B SRAM EUI-48 Learn More about Microchip Technology microchip mcp7940n calendar	Datasheet	Non-Stocked Lead-Time 10 Weeks	Reel ¥153.5	Min.: 3,300 Mult.: 3,300 : 3,300											Reel
Real Time Clock I2C GP RTCC 64B SRAM EUI-48 MCP79401T-I/ST Microchip Technology 2,500: ¥164.1 Non-Stocked Lead-Time 10 Weeks	Mfr. Part # MCP79401T-I/ST Mouser Part # 579-MCP79401TIST	Microchip Technology	Real Time Clock I2C GP RTCC 64B SRAM EUI-48 Learn More about Microchip Technology microchip mcp7940n calendar	Datasheet	Non-Stocked Lead-Time 10 Weeks	Reel ¥164.1	Min.: 2,500 Mult.: 2,500 : 2,500											Reel
Real Time Clock I2C GP RTCC 64B SRAM EUI-64 MCP79402-I/ST Microchip Technology 1: ¥179.4 Non-Stocked Lead-Time 10 Weeks	Mfr. Part # MCP79402-I/ST Mouser Part # 579-MCP79402IST	Microchip Technology	Real Time Clock I2C GP RTCC 64B SRAM EUI-64 Learn More about Microchip Technology microchip mcp7940n calendar	Datasheet	Non-Stocked Lead-Time 10 Weeks	¥179.4 ¥167.8 ¥164.1	Min.: 1 Mult.: 1	Serial 2-Wire, I2C	YY-MM-DD-dd	HH:MM:SS:hh (12 hr, 24 hr)	TSSOP-8	Backup Switching	1.8 V	5.5 V	- 40 C	+ 85 C	SMD/SMT	Tube