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Real Time Clock

Real Time Clocks are in stock with same-day shipping at Mouser from industry leading manufacturers. Mouser is an authorized distributor for many real time clock manufacturers including Analog Devices, Epson, Microchip, Micro Crystal, NXP, Renesas Electronics, STMicroelectronics & more.
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Image	Part #	Mfr.	Description	Datasheet	Availability	Pricing (USD) 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	Packaging
Real Time Clock 16K (2Kx8) 70ns M48T12-70PC1 STMicroelectronics 1: $41.26 844In Stock	Mfr. Part # M48T12-70PC1 Mouser Part # 511-M48T1270PC1	STMicroelectronics	Real Time Clock 16K (2Kx8) 70ns	Datasheet	844In Stock	$41.26 $30.35 $29.13 $27.99 View $26.98 Quote	Min.: 1 Mult.: 1	Parallel	YY-MM-DD-dd	HH:MM:SS (24 hr)	PCDIP-24	Integrated Battery	4.5 V	5.5 V	0 C	+ 70 C	M48T12	Through Hole	Tube
Real Time Clock 64K (8Kx8) 150ns M48T18-150PC1 STMicroelectronics 1: $50.47 408In Stock	Mfr. Part # M48T18-150PC1 Mouser Part # 511-M48T1815PC1	STMicroelectronics	Real Time Clock 64K (8Kx8) 150ns	Datasheet	408In Stock	$50.47 $38.12 $36.45 $35.78 View $35.63 Quote	Min.: 1 Mult.: 1	Parallel	YY-MM-DD-dd	HH:MM:SS (24 hr)	PCDIP-28	Integrated Battery	4.5 V	5.5 V	0 C	+ 70 C	M48T18	Through Hole	Tube
Real Time Clock 64K (8Kx8) 100ns M48T08Y-10MH1F STMicroelectronics 1: $41.13 937In Stock	Mfr. Part # M48T08Y-10MH1F Mouser Part # 511-M48T08Y-10MH1F	STMicroelectronics	Real Time Clock 64K (8Kx8) 100ns	Datasheet	937In Stock	Cut Tape $41.13 $33.30 $31.34 $30.04 View Reel $27.13 $28.16 $27.15 $27.13 Quote MouseReel Available	Min.: 1 Mult.: 1 : 936	Parallel	YY-MM-DD-dd	HH:MM:SS (24 hr)	SOX-28	Backup Switching	4.5 V	5.5 V	0 C	+ 70 C	M48T08Y	SMD/SMT	Reel, Cut Tape, MouseReel
Real Time Clock RTC IC with 400 kHz I2C interface featuring 64 byte SRAM in HXSON10 package. PCF85363ATL/AX NXP Semiconductors 1: $1.42 81,394In Stock	Mfr. Part # PCF85363ATL/AX Mouser Part # 771-PCF85363ATL/AX	NXP Semiconductors	Real Time Clock RTC IC with 400 kHz I2C interface featuring 64 byte SRAM in HXSON10 package.	Datasheet	81,394In Stock	Cut Tape $1.42 $1.11 $1.04 $0.95 View Reel $0.807 $0.91 $0.886 $0.878 $0.857 $0.807 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	PCF85363A	SMD/SMT	Reel, Cut Tape, MouseReel
Real Time Clock 2Kb EE 64B SRAM WD TED EUI-64 MCP795W22-I/ST Microchip Technology 1: $1.98 4,775In Stock	Mfr. Part # MCP795W22-I/ST Mouser Part # 579-MCP795W22-I/ST	Microchip Technology	Real Time Clock 2Kb EE 64B SRAM WD TED EUI-64 Learn More about Microchip Technology microchip mcp795xx	Datasheet	4,775In Stock	$1.98 $1.84	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 4-wire Real Time Clock Module R2045S-E2-FE Nisshinbo 1: $4.72 3,638In Stock	Mfr. Part # R2045S-E2-FE Mouser Part # 848-R2045S-E2-FE	Nisshinbo	Real Time Clock 4-wire Real Time Clock Module	Datasheet	3,638In Stock	Cut Tape $4.72 $3.57 $3.28 $2.96 Reel $2.53 View $2.81 $2.62 $2.50 MouseReel Available	Min.: 1 Mult.: 1 : 1,000	Serial 4-Wire	YY-MM-DD-dd	HH:MM:SS:hh (12 hr, 24 hr)		No Backup Switching	1.7 V	5.5 V	- 40 C	+ 85 C	R2045S/D	SMD/SMT	Reel, Cut Tape, MouseReel
Real Time Clock 2-Wire Real Time Clock IC R2051S02-E2-F Nisshinbo 1: $1.73 2,000In Stock	Mfr. Part # R2051S02-E2-F Mouser Part # 848-R2051S02E2F	Nisshinbo	Real Time Clock 2-Wire Real Time Clock IC	Datasheet	2,000In Stock	Cut Tape $1.73 $1.26 $1.15 $1.06 $0.802 Reel $0.801 MouseReel Available	Min.: 1 Mult.: 1 : 2,000	Serial 2-Wire, I2C	YY-MM-DD-dd	HH:MM:SS:hh (12 hr, 24 hr)	SSOP-16	Backup Switching	750 mV	5.5 V	- 40 C	+ 85 C	R2051S	SMD/SMT	Reel, Cut Tape, MouseReel
Real Time Clock I2C GP RTCC 1Kb EE 64B SRAM EUI-64 MCP79412-I/MS Microchip Technology 1: $1.18 3,720In Stock	Mfr. Part # MCP79412-I/MS Mouser Part # 579-MCP79412IMS	Microchip Technology	Real Time Clock I2C GP RTCC 1Kb EE 64B SRAM EUI-64 Learn More about Microchip Technology microchip mcp794xx calendars	Datasheet	3,720In Stock	$1.18 $1.17 $1.08 $1.02	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 64B SRAM ID MCP79400-I/MS Microchip Technology 1: $1.00 5,400In Stock	Mfr. Part # MCP79400-I/MS Mouser Part # 579-MCP79400IMS	Microchip Technology	Real Time Clock I2C GP RTCC 64B SRAM ID Learn More about Microchip Technology microchip mcp7940n calendar	Datasheet	5,400In Stock	$1.00 $0.92 $0.87	Min.: 1 Mult.: 1	Serial 2-Wire, 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 RTCC 64B SRAM No VBAT MCP7940MT-I/MS Microchip Technology 1: $0.75 6,834In Stock	Mfr. Part # MCP7940MT-I/MS Mouser Part # 579-MCP7940MT-I/MS	Microchip Technology	Real Time Clock I2C RTCC 64B SRAM No VBAT Learn More about Microchip Technology microchip real time clocks	Datasheet	6,834In Stock	Cut Tape $0.75 $0.683 $0.682 Reel $0.612 MouseReel Available	Min.: 1 Mult.: 1 : 2,500	I2C	YY-MM-DD-dd	HH:MM:SS:hh (12 hr, 24 hr)	MSOP-8	No Backup Switching	1.8 V	5.5 V	- 40 C	+ 85 C		SMD/SMT	Reel, Cut Tape, MouseReel
Real Time Clock I2C GP RTCC 64B SRAM EUI-48 MCP79401-I/SN Microchip Technology 1: $1.04 12,519In Stock	Mfr. Part # MCP79401-I/SN Mouser Part # 579-MCP79401ISN	Microchip Technology	Real Time Clock I2C GP RTCC 64B SRAM EUI-48 Learn More about Microchip Technology microchip mcp7940n calendar	Datasheet	12,519In Stock	$1.04 $0.96 $0.91 $0.906	Min.: 1 Mult.: 1	Serial 2-Wire, I2C	YY-MM-DD-dd	HH:MM:SS:hh (12 hr, 24 hr)	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-64 MCP79412-I/ST Microchip Technology 1: $1.18 4,615In Stock	Mfr. Part # MCP79412-I/ST Mouser Part # 579-MCP79412IST	Microchip Technology	Real Time Clock I2C GP RTCC 1Kb EE 64B SRAM EUI-64 Learn More about Microchip Technology microchip mcp794xx calendars	Datasheet	4,615In Stock	$1.18 $1.08 $1.03	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 I C RTC with Trickle Charger DS1340C-3# Analog Devices / Maxim Integrated 1: $6.90 13,268In Stock	Mfr. Part # DS1340C-3# Mouser Part # 700-DS1340C-3#-	Analog Devices / Maxim Integrated	Real Time Clock I C RTC with Trickle Charger Learn More about Analog Devices / Maxim Integrated maximds1343	Datasheet	13,268In Stock	$6.90 $6.75 $6.60 $6.47 View $6.37 $6.27 $6.18 Quote	Min.: 1 Mult.: 1 Max.: 10,614	Serial 2-Wire, I2C	YY-MM-DD-dd	HH:MM:SS (24 hr)	SO-16	Backup Switching	2.7 V	3.3 V	- 40 C	+ 85 C	DS1340C	SMD/SMT	Tube
Real Time Clock I C RTC with 56-Byte NV RAM DS1338Z-33+ Analog Devices / Maxim Integrated 1: $6.64 23,420In Stock	Mfr. Part # DS1338Z-33+ Mouser Part # 700-DS1338Z-33	Analog Devices / Maxim Integrated	Real Time Clock I C RTC with 56-Byte NV RAM	Datasheet	23,420In Stock	$6.64 $5.09 $4.70 $4.27 View $4.06 $3.94 $3.90 $3.85	Min.: 1 Mult.: 1 Max.: 18,913	I2C	YY-MM-DD-dd	HH:MM:SS:hh (12 hr, 24 hr)	SOIC-8	Backup Switching	3 V	5.5 V	- 40 C	+ 85 C	DS1338Z	SMD/SMT	Tube
Real Time Clock Y2K-Compliant, Nonvolatile Timekeeping R DS1744WP-120IND+ Analog Devices / Maxim Integrated 1: $65.21 627In Stock	Mfr. Part # DS1744WP-120IND+ Mouser Part # 700-DS1744WP-120IND	Analog Devices / Maxim Integrated	Real Time Clock Y2K-Compliant, Nonvolatile Timekeeping R	Datasheet	627In Stock	$65.21 $55.88 $52.05 $50.88 Quote Quote	Min.: 1 Mult.: 1 Max.: 501	Parallel	YY-MM-DD-dd	HH:MM:SS (24 hr)	PowerCap Module-34	Backup Switching	2.97 V	3.63 V	- 40 C	+ 85 C	DS1744WP	SMD/SMT	Tray
Real Time Clock Extremely Accurate SPI Bus RTC with Inte DS3234SN# Analog Devices / Maxim Integrated 1: $17.68 18,356In Stock	Mfr. Part # DS3234SN# Mouser Part # 700-DS3234SN#	Analog Devices / Maxim Integrated	Real Time Clock Extremely Accurate SPI Bus RTC with Inte	Datasheet	18,356In Stock	$17.68 $14.01 $12.97 $12.08 View $11.52 $11.32 Quote	Min.: 1 Mult.: 1 Max.: 14,770	SPI	YY-MM-DD-dd	HH:MM:SS:hh (12 hr, 24 hr)	SO-20	Backup Switching	2 V	5.5 V	- 40 C	+ 85 C	DS3234SN	SMD/SMT	Tube
Real Time Clock Y2K-Compliant, Nonvolatile Timekeeping R DS1744P-70IND+ Analog Devices / Maxim Integrated 1: $43.71 912In Stock	Mfr. Part # DS1744P-70IND+ Mouser Part # 700-DS1744P-70IND	Analog Devices / Maxim Integrated	Real Time Clock Y2K-Compliant, Nonvolatile Timekeeping R	Datasheet	912In Stock	$43.71 $42.74 $41.82 $40.98 View $40.35 Quote	Min.: 1 Mult.: 1 Max.: 729	Parallel	YY-MM-DD-dd	HH:MM:SS (24 hr)	PowerCap Module-34	Backup Switching	4.5 V	5.5 V	- 40 C	+ 85 C	DS1744P	SMD/SMT	Tray
Real Time Clock Ultra-Low power 12C Real Time clock w/ p MAX31331EWC+T Analog Devices / Maxim Integrated 1: $3.15 9,454In Stock	Mfr. Part # MAX31331EWC+T Mouser Part # 700-MAX31331EWC+T	Analog Devices / Maxim Integrated	Real Time Clock Ultra-Low power 12C Real Time clock w/ p Learn More about Analog Devices / Maxim Integrated maxim max31331 real time clock	Datasheet	9,454In Stock	Cut Tape $3.15 $2.35 $2.15 $1.93 Reel $1.63 View $1.82 $1.78 $1.69 $1.60 MouseReel Available	Min.: 1 Mult.: 1 Max.: 7,563 : 2,500	I2C	BCD	BCD	WLP-12	Backup Switching	1.1 V	5.5 V	- 40 C	+ 85 C		SMD/SMT	Reel, Cut Tape, MouseReel
Real Time Clock I C RTC with Trickle Charger DS1340Z-18+ Analog Devices / Maxim Integrated 1: $8.28 5,864In Stock	Mfr. Part # DS1340Z-18+ Mouser Part # 700-DS1340Z-18	Analog Devices / Maxim Integrated	Real Time Clock I C RTC with Trickle Charger Learn More about Analog Devices / Maxim Integrated maximds1343	Datasheet	5,864In Stock	$8.28 $6.39 $5.75 $5.26 View $4.99 $4.91 $4.82 $4.63	Min.: 1 Mult.: 1 Max.: 4,691	I2C	YY-MM-DD-dd	HH:MM:SS (24 hr)	SO-8	Backup Switching	1.71 V	1.89 V	- 40 C	+ 85 C	DS1340Z	SMD/SMT	Tube
Real Time Clock LW PWR RTC W/RESEAL 8LD ISL12008IB8Z-T Renesas / Intersil 1: $3.23 1,154In Stock	Mfr. Part # ISL12008IB8Z-T Mouser Part # 968-ISL12008IB8Z-T	Renesas / Intersil	Real Time Clock LW PWR RTC W/RESEAL 8LD	Datasheet	1,154In Stock	Cut Tape $3.23 $2.41 $2.20 $1.98 Reel $1.67 View $1.87 $1.83 $1.73 $1.64 MouseReel Available	Min.: 1 Mult.: 1 : 2,500	Serial 2-Wire, I2C	YY-MM-DD-dd	HH:MM:SS:hh (12 hr, 24 hr)	SOIC-8	Backup Switching	2.7 V	5.5 V	- 40 C	+ 85 C	ISL12008	SMD/SMT	Reel, Cut Tape, MouseReel
Real Time Clock I2C GP RTCC 1Kb EE 64B SRAM EUI-48 MCP79411T-I/MS Microchip Technology 1: $1.25 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 $1.25 Reel $1.03 MouseReel Available	Min.: 1 Mult.: 1 : 2,500	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	Reel, Cut Tape, MouseReel
Real Time Clock REAL TIME CLKRTC IN ISL1219IUZ-T Renesas / Intersil 1: $4.06 2,180In Stock	Mfr. Part # ISL1219IUZ-T Mouser Part # 968-ISL1219IUZ-T	Renesas / Intersil	Real Time Clock REAL TIME CLKRTC IN	Datasheet	2,180In Stock	Cut Tape $4.06 $3.06 $2.81 $2.54 View Reel $2.24 $2.41 $2.39 $2.25 $2.24 MouseReel Available	Min.: 1 Mult.: 1 : 2,500	I2C	YY-MM-DD-dd	HH:MM:SS (24 hr)	MSOP-10	Backup Switching	2.7 V	5.5 V	- 40 C	+ 85 C	ISL1219	SMD/SMT	Reel, Cut Tape, MouseReel
Real Time Clock Real Time Clock S-35190A-J8T1U ABLIC 1: $1.50 4,632In Stock	Mfr. Part # S-35190A-J8T1U Mouser Part # 628-35190A-G	ABLIC	Real Time Clock Real Time Clock	Datasheet	4,632In Stock	Cut Tape $1.50 $1.19 $1.11 $1.02 View Reel $0.853 $0.974 $0.949 $0.941 $0.854 $0.853 MouseReel Available	Min.: 1 Mult.: 1 : 4,000	Serial 3-Wire	YY-MM-DD-dd	HH:MM:SS (24 hr)	SOP-8	Backup Switching	1.3 V	5.5 V	- 40 C	+ 85 C	S-35190	SMD/SMT	Reel, Cut Tape, MouseReel
Real Time Clock REAL TIME CLK & TEMP COMPENSATED CRYSTAL ISL12022MIBZ Renesas / Intersil 1: $7.52 333In Stock	Mfr. Part # ISL12022MIBZ Mouser Part # 968-ISL12022MIBZ	Renesas / Intersil	Real Time Clock REAL TIME CLK & TEMP COMPENSATED CRYSTAL	Datasheet	333In Stock	$7.52 $5.80 $4.91 $4.58 View $4.47 $4.35 $4.24 Quote	Min.: 1 Mult.: 1	Serial 2-Wire, I2C	YY-MM-DD-dd	HH:MM:SS (24 hr)	SOIC-20	Backup Switching	2.7 V	5.5 V	- 40 C	+ 85 C	ISL12022	SMD/SMT	Tube
Real Time Clock 3-wire Real Time Clock S-35190A-I8T1U ABLIC 1: $1.36 2,889In Stock	Mfr. Part # S-35190A-I8T1U Mouser Part # 628-S-35190A-I8T1U	ABLIC	Real Time Clock 3-wire Real Time Clock	Datasheet	2,889In Stock	Cut Tape $1.36 $1.11 $1.05 $0.979 View Reel $0.853 $0.947 $0.928 $0.925 $0.854 $0.853 MouseReel Available	Min.: 1 Mult.: 1 : 5,000	Serial 3-Wire	YY-MM-DD-dd	HH:MM:SS (24 hr)	SNT-A-8	Backup Switching	1.3 V	5.5 V	- 40 C	+ 85 C	S-35190	SMD/SMT	Reel, Cut Tape, MouseReel