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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 (CLP) 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	Qualification	Packaging
Real Time Clock SPI GP RTCC 2Kb EE 64B SRAM ID MCP79520T-I/MS Microchip Technology 1: $1.698 1.890In Stock 2.500Expected 11/10/2026	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	1.890In Stock 2.500Expected 11/10/2026	Cut Tape $1.698 Reel $1.424 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 Serial RTC A 595-BQ3 2000D A 595-BQ32000 A 595-BQ32000D BQ32000DR Texas Instruments 1: $2.643 2.566In Stock 5.000Expected 2/25/2027	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	2.566In Stock 5.000Expected 2/25/2027	Cut Tape $2.643 $1.948 $1.777 $1.584 Reel $1.356 View $1.492 $1.447 $1.401 $1.322 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: $2.108 2.726In 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	2.726In Stock	Cut Tape $2.108 $1.549 $1.413 $1.253 View Reel $1.023 $1.185 $1.122 $1.116 $1.078 $1.023 MouseReel Available	Min.: 1 Mult.: 1 : 5.000	Serial 2-Wire, I2C	YY-MM-DD-dd	HH:MM:SS:hh (12 hr, 24 hr)	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-T8T1U ABLIC 1: $2.108 2.585In 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	2.585In Stock	Cut Tape $2.108 $1.549 $1.413 $1.253 View Reel $972 $1.185 $1.122 $1.116 $1.078 $972 MouseReel Available	Min.: 1 Mult.: 1 : 4.000	Serial 2-Wire, I2C	YY-MM-DD-dd	HH:MM:SS:hh (12 hr, 24 hr)	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 Real-time Clock Mod I2C Bus PT7C4337WEX Diodes Incorporated 1: $1.230 3.983In Stock	Mfr. Part # PT7C4337WEX Mouser Part # 729-PT7C4337WEX	Diodes Incorporated	Real Time Clock Real-time Clock Mod I2C Bus Learn More about Diodes Incorporated diodes timing solutions	Datasheet	3.983In Stock	Cut Tape $1.230 $882 $770 $700 View Reel $584 $674 $661 $649 $584 MouseReel Available	Min.: 1 Mult.: 1 : 2.500	Serial 2-Wire, I2C	YY-MM-DD-dd	HH:MM:SS:hh (12 hr, 24 hr)		No Backup Switching	1.2 V	5.5 V	- 40 C	+ 85 C		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: $1.880 3.225In 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	3.225In Stock 32.500On Order On Order Ship Dates Mfr. #: PCA85073ADP/Q900Z Stock: 3.225 Can Ship Immediately On Order: 17.500 Expected 2/16/2027 15.000 Expected 3/22/2027 Factory Lead-Time: 27 Weeks	Cut Tape $1.880 $1.379 $1.253 $1.109 View Reel $934 $1.042 $1.003 $975 $934 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: $1.082 6.045In 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	6.045In Stock 27.500On Order On Order Ship Dates Mfr. #: PCF85063ATT/AJ Stock: 6.045 Can Ship Immediately On Order: 15.000 Expected 3/1/2027 12.500 Expected 7/5/2027 Factory Lead-Time: 27 Weeks	Cut Tape $1.082 $736 $662 $616 View Reel $518 $574 $549 $540 $518 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: $911 13.377In Stock	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	13.377In Stock	Cut Tape $911 $660 $598 $546 View Reel $434 $508 $485 $472 $460 $434 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: $1.572 7.080In Stock 40.000Expected 2/15/2027	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	7.080In Stock 40.000Expected 2/15/2027	Cut Tape $1.572 $1.151 $1.033 $915 View Reel $774 $859 $825 $808 $774 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: $1.652 5.392In Stock 7.500Expected 12/7/2026	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	5.392In Stock 7.500Expected 12/7/2026	Cut Tape $1.652 $1.208 $1.088 $962 Reel $813 View $901 $865 $835 $786 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
Real Time Clock RTC IC with 400 kHz I2C interface featuring 64 byte SRAM in TSSOP8 package. PCF85363ATT/AJ NXP Semiconductors 1: $1.994 8.231In Stock 5.000Expected 5/3/2027	Mfr. Part # PCF85363ATT/AJ Mouser Part # 771-PCF85363ATT/AJ	NXP Semiconductors	Real Time Clock RTC IC with 400 kHz I2C interface featuring 64 byte SRAM in TSSOP8 package. Learn More about NXP Semiconductors nxp pcf85063 clocks	Datasheet	8.231In Stock 5.000Expected 5/3/2027	Cut Tape $1.994 $1.458 $1.322 $1.173 Reel $981 View $1.099 $1.057 $1.038 $965 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	PCF85363A	SMD/SMT		Reel, Cut Tape, MouseReel
Real Time Clock RTC IC with 400 kHz I2C interface in TSSOP8 package. PCF8563TS/5,118 NXP Semiconductors 1: $2.073 10.139In Stock 6.495Expected 11/10/2026	Mfr. Part # PCF8563TS/5,118 Mouser Part # 771-PCF8563TS/5118	NXP Semiconductors	Real Time Clock RTC IC with 400 kHz I2C interface in TSSOP8 package.	Datasheet	10.139In Stock 6.495Expected 11/10/2026	Cut Tape $2.073 $1.527 $1.390 $1.253 Reel $1.074 View $1.185 $1.151 $1.128 $1.028 MouseReel Available	Min.: 1 Mult.: 1 : 2.500	I2C	YY-MM-DD-dd	HH:MM:SS (24 hr)	TSSOP-8	No Backup Switching	1 V	5.5 V	- 40 C	+ 85 C	PCF8563	SMD/SMT		Reel, Cut Tape, MouseReel
Real Time Clock Hi Prec I2C-Bus Real Time Clock Mod R2025S-E2-FE Nisshinbo 1: $5.104 2.262In Stock	Mfr. Part # R2025S-E2-FE Mouser Part # 848-R2025S-E2-FE	Nisshinbo	Real Time Clock Hi Prec I2C-Bus Real Time Clock Mod Learn More about Nisshinbo ricoh r2025 i2c bus rtc module	Datasheet	2.262In Stock	Cut Tape $5.104 $3.862 $3.555 $3.213 Reel $2.894 View $3.042 $3.008 $2.757 $2.643 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	1.7 V	5.5 V	- 40 C	+ 85 C	R2025S/D	SMD/SMT		Reel, Cut Tape, MouseReel
Real Time Clock 4-Wire Real Time Clock IC R2043T-E2-F Nisshinbo 1: $1.720 2.176In Stock	Mfr. Part # R2043T-E2-F Mouser Part # 848-R2043TE2F	Nisshinbo	Real Time Clock 4-Wire Real Time Clock IC	Datasheet	2.176In Stock	Cut Tape $1.720 $1.253 $1.124 $998 Reel $844 View $936 $900 $890 $826 MouseReel Available	Min.: 1 Mult.: 1 : 2.000	Serial 4-Wire, SPI	YY-MM-DD-dd	HH:MM:SS:hh (12 hr, 24 hr)	TSSOP-10	No Backup Switching	1.7 V	5.5 V	- 40 C	+ 85 C	R2043T	SMD/SMT		Reel, Cut Tape, MouseReel
Real Time Clock 2-Wire Real Time Clock IC R2051S01-E2-F Nisshinbo 1: $2.028 4.120In Stock	Mfr. Part # R2051S01-E2-F Mouser Part # 848-R2051S01E2F	Nisshinbo	Real Time Clock 2-Wire Real Time Clock IC	Datasheet	4.120In Stock	Cut Tape $2.028 $1.492 $1.356 $1.196 Reel $1.008 View $1.119 $1.075 $1.056 $985 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 2-Wire Real Time Clock IC R2221T-E2-F Nisshinbo 1: $1.891 2.268In Stock	Mfr. Part # R2221T-E2-F Mouser Part # 848-R2221TE2F	Nisshinbo	Real Time Clock 2-Wire Real Time Clock IC	Datasheet	2.268In Stock	Cut Tape $1.891 $1.390 $1.253 $1.112 Reel $935 View $1.045 $1.004 $984 $914 MouseReel Available	Min.: 1 Mult.: 1 : 2.000	Serial 2-Wire, I2C	YY-MM-DD-dd	HH:MM:SS:hh (12 hr, 24 hr)	TSSOP-10	No Backup Switching	1.5 V	5.5 V	- 40 C	+ 85 C	R2221T	SMD/SMT		Reel, Cut Tape, MouseReel
Real Time Clock Real Time Clock A 92 6-DP8573AVX/NOPB A A 926-DP8573AVX/NOPB DP8573AV/NOPB Texas Instruments 1: $38.052 73In Stock	Mfr. Part # DP8573AV/NOPB Mouser Part # 926-DP8573AV/NOPB	Texas Instruments	Real Time Clock Real Time Clock A 92 6-DP8573AVX/NOPB A A 926-DP8573AVX/NOPB	Datasheet	73In Stock	$38.052 $32.640 $30.612 $28.379 View $27.115 Quote	Min.: 1 Mult.: 1	Parallel	YY-MM-DD-dd	HH:MM:SS:hh (12 hr, 24 hr)	PLCC-28	Backup Switching	4.5 V	5.5 V	- 40 C	+ 85 C	DP8573A	SMD/SMT		Tube
Real Time Clock LW PWR RTC W/RESEAL 8LD ISL12008IB8Z Renesas / Intersil 1: $3.680 3.210In Stock	Mfr. Part # ISL12008IB8Z Mouser Part # 968-ISL12008IB8Z	Renesas / Intersil	Real Time Clock LW PWR RTC W/RESEAL 8LD	Datasheet	3.210In Stock	$3.680 $2.746 $2.518 $2.267 View $2.142 $2.028 $1.960 $1.925 $1.868	Min.: 1 Mult.: 1	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		Tube
Real Time Clock REAL TIME CLK ENHANC CD ESD & MOISTURESIS ISL12022MAIBZ Renesas / Intersil 1: $8.499 433In Stock	Mfr. Part # ISL12022MAIBZ Mouser Part # 968-ISL12022MAIBZ	Renesas / Intersil	Real Time Clock REAL TIME CLK ENHANC CD ESD & MOISTURESIS	Datasheet	433In Stock	$8.499 $6.551 $6.061 $5.525 View $5.115 $4.956 $4.717	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 REAL TIME CLK ENHANC CD ESD & MOISTURESIS ISL12022MAIBZ-T Renesas / Intersil 1: $8.795 900In Stock	Mfr. Part # ISL12022MAIBZ-T Mouser Part # 968-ISL12022MAIBZ-T	Renesas / Intersil	Real Time Clock REAL TIME CLK ENHANC CD ESD & MOISTURESIS	Datasheet	900In Stock	Cut Tape $8.795 $6.790 $6.289 $5.731 Reel $5.150 View $5.389 $5.377 $4.967 MouseReel Available	Min.: 1 Mult.: 1 : 1.000	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		Reel, Cut Tape, MouseReel
Real Time Clock REAL TIME CLK & TEMP COMPENSATED CRYSTAL ISL12022MIBZ-T Renesas / Intersil 1: $8.567 585In Stock	Mfr. Part # ISL12022MIBZ-T Mouser Part # 968-ISL12022MIBZ-T	Renesas / Intersil	Real Time Clock REAL TIME CLK & TEMP COMPENSATED CRYSTAL	Datasheet	585In Stock	Cut Tape $8.567 $6.608 $6.118 $5.582 Reel $5.013 View $5.241 $4.831 MouseReel Available	Min.: 1 Mult.: 1 : 1.000	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		Reel, Cut Tape, MouseReel
Real Time Clock REAL TIME CLK W/ ALARM DS1337 COMP ISL12057IUZ-T Renesas / Intersil 1: $3.327 5.056In Stock	Mfr. Part # ISL12057IUZ-T Mouser Part # 968-ISL12057IUZ-T	Renesas / Intersil	Real Time Clock REAL TIME CLK W/ ALARM DS1337 COMP	Datasheet	5.056In Stock	Cut Tape $3.327 $2.484 $2.267 $2.039 Reel $1.732 View $1.925 $1.868 $1.811 $1.675 MouseReel Available	Min.: 1 Mult.: 1 : 2.500	I2C	YY-MM-DD-dd	HH:MM:SS (24 hr)	MSOP-8	No Backup Switching	1.8 V	3.6 V	- 40 C	+ 85 C	ISL12057	SMD/SMT		Reel, Cut Tape, MouseReel
Real Time Clock I2C REAL TIME CLOCK/ CALENDAR 8LD ISL1208IB8Z Renesas / Intersil 1: $3.372 1.354In Stock	Mfr. Part # ISL1208IB8Z Mouser Part # 968-ISL1208IB8Z	Renesas / Intersil	Real Time Clock I2C REAL TIME CLOCK/ CALENDAR 8LD	Datasheet	1.354In Stock	$3.372 $2.449 $2.244 $2.017 View $1.903 $1.857 $1.766 $1.732 $1.709	Min.: 1 Mult.: 1	I2C	YY-MM-DD-dd	HH:MM:SS (24 hr)	SOIC-8	Backup Switching	2.7 V	5.5 V	- 40 C	+ 85 C	ISL1208	SMD/SMT		Tube
Real Time Clock I2C REAL TIME CLOCK/ CALENDAR 8LD ISL1208IB8Z-TK Renesas / Intersil 1: $3.361 7.326In Stock 5.000Expected 3/22/2027	Mfr. Part # ISL1208IB8Z-TK Mouser Part # 968-ISL1208IB8Z-TK	Renesas / Intersil	Real Time Clock I2C REAL TIME CLOCK/ CALENDAR 8LD	Datasheet	7.326In Stock 5.000Expected 3/22/2027	Cut Tape $3.361 $2.506 $2.290 $2.062 Reel $1.800 View $1.948 $1.891 $1.743 $1.709 MouseReel Available	Min.: 1 Mult.: 1 : 1.000	I2C	YY-MM-DD-dd	HH:MM:SS (24 hr)	SOIC-8	Backup Switching	2.7 V	5.5 V	- 40 C	+ 85 C	ISL1208	SMD/SMT		Reel, Cut Tape, MouseReel
Real Time Clock I2C REAL TIME CLOCK/ CALENDAR 8LD ISL1208IU8Z Renesas / Intersil 1: $4.113 2.071In Stock	Mfr. Part # ISL1208IU8Z Mouser Part # 968-ISL1208IU8Z	Renesas / Intersil	Real Time Clock I2C REAL TIME CLOCK/ CALENDAR 8LD	Datasheet	2.071In Stock	$4.113 $3.053 $2.609 $2.484 View $2.392 $2.381 $2.324 $2.165 $2.130	Min.: 1 Mult.: 1	I2C	YY-MM-DD-dd	HH:MM:SS (24 hr)	MSOP-8	Backup Switching	2.7 V	5.5 V	- 40 C	+ 85 C	ISL1208	SMD/SMT		Tube