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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	Qualification	Time Keeping Current	Packaging
Real Time Clock SPI GP RTCC 2Kb EE 64B SRAM EUI-48 MCP79521-I/MS Microchip Technology 1: $1.48 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	$1.48 $1.37 $1.34	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		1.2 uA	Tube
Real Time Clock SPI GP RTCC 2Kb EE 64B SRAM EUI-48 MCP79521T-I/MS Microchip Technology 1: $1.60 666In 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	666In Stock	Cut Tape $1.60 Reel $1.34 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		1.2 uA	Reel, Cut Tape, MouseReel
Real Time Clock SAMAY A 595-BQ32002D R A 595-BQ32002DR A A 595-BQ32002DR BQ32002D Texas Instruments 1: $2.36 329In Stock 1,500Expected 12/3/2026	Mfr. Part # BQ32002D Mouser Part # 595-BQ32002D	Texas Instruments	Real Time Clock SAMAY A 595-BQ32002D R A 595-BQ32002DR A A 595-BQ32002DR	Datasheet	329In Stock 1,500Expected 12/3/2026	$2.36 $1.75 $1.52 $1.40 View $1.33 $1.29 $1.25 $1.21 $1.16	Min.: 1 Mult.: 1	Serial 2-Wire, I2C	YY-MM-DD-dd	HH:MM:SS (24 hr)	SOIC-8	Backup Switching	3 V	3.6 V	- 40 C	+ 85 C	BQ32002	SMD/SMT			Tube
Real Time Clock 3WIRE REAL TIME CLCK S-35192A-I8T1U ABLIC 1: $1.83 4,796In Stock	Mfr. Part # S-35192A-I8T1U Mouser Part # 628-S-35192A-I8T1U	ABLIC	Real Time Clock 3WIRE REAL TIME CLCK	Datasheet	4,796In Stock	Cut Tape $1.83 $1.34 $1.22 $1.08 View Reel $0.898 $1.02 $0.984 $0.979 $0.918 $0.898	Min.: 1 Mult.: 1 : 5,000				SNT-A-8						S-35192			3.3 uA	Reel, Cut Tape
Real Time Clock Real Time Clock S-35390A-J8T1U ABLIC 1: $1.85 510In 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	510In Stock	Cut Tape $1.85 $1.36 $1.24 $1.10 View Reel $0.908 $1.04 $0.985 $0.98 $0.946 $0.908	Min.: 1 Mult.: 1 : 4,000	Serial 2-Wire, I2C	YY-MM-DD-dd	HH:MM:SS:hh (12 hr, 24 hr)	SOP-8	No Backup Switching	1.3 V	5.5 V	- 40 C	+ 85 C	S-35390	SMD/SMT		250 nA	Reel, Cut Tape
Real Time Clock 1.8V-5.5V Real Time Clock 12C bus PT7C4337UEX Diodes Incorporated 1: $1.26 1,732In Stock	Mfr. Part # PT7C4337UEX Mouser Part # 729-PT7C4337UEX	Diodes Incorporated	Real Time Clock 1.8V-5.5V Real Time Clock 12C bus Learn More about Diodes Incorporated diodes timing solutions	Datasheet	1,732In Stock	Cut Tape $1.26 $0.903 $0.773 $0.719 View Reel $0.588 $0.705 $0.697 $0.589 $0.588 MouseReel Available	Min.: 1 Mult.: 1 : 2,500													450 nA	Reel, Cut Tape, MouseReel
Real Time Clock 1.8V-5.5V Real Time Clock 12C bus PT7C4337ZEEX Diodes Incorporated 1: $1.30 158In Stock	Mfr. Part # PT7C4337ZEEX Mouser Part # 729-PT7C4337ZEEX	Diodes Incorporated	Real Time Clock 1.8V-5.5V Real Time Clock 12C bus Learn More about Diodes Incorporated diodes timing solutions	Datasheet	158In Stock	Cut Tape $1.30 $0.938 $0.82 $0.745 View Reel $0.591 $0.72 $0.705 $0.692 $0.591 MouseReel Available	Min.: 1 Mult.: 1 : 3,000													450 nA	Reel, Cut Tape, MouseReel
Real Time Clock 2-Wire Real-time Clock module PT7C43390LEX Diodes Incorporated 1: $1.78 324In Stock	Mfr. Part # PT7C43390LEX Mouser Part # 729-PT7C43390LEX	Diodes Incorporated	Real Time Clock 2-Wire Real-time Clock module Learn More about Diodes Incorporated diodes timing solutions	Datasheet	324In Stock	Cut Tape $1.78 $1.31 $1.19 $1.06 View Reel $0.888 $0.99 $0.952 $0.947 $0.888 MouseReel Available	Min.: 1 Mult.: 1 : 2,500													7 uA	Reel, Cut Tape, MouseReel
Real Time Clock Real-time Clock IC PT7C4372ALEX Diodes Incorporated 1: $1.15 25In Stock 2,500Expected 12/2/2026	Mfr. Part # PT7C4372ALEX Mouser Part # 729-PT7C4372ALEX	Diodes Incorporated	Real Time Clock Real-time Clock IC Learn More about Diodes Incorporated diodes timing solutions	Datasheet	25In Stock 2,500Expected 12/2/2026	Cut Tape $1.15 $0.827 $0.697 $0.602 View Reel $0.514 $0.581 $0.569 $0.555 $0.514 MouseReel Available	Min.: 1 Mult.: 1 : 2,500													500 nA	Reel, Cut Tape, MouseReel
Real Time Clock Automotive RTC IC with 400 kHz I2C interface in TSSOP8 package. PCA85073ADP/Q900Z NXP Semiconductors 1: $1.65 179In Stock 52,500On 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	179In Stock 52,500On Order On Order Ship Dates Mfr. #: PCA85073ADP/Q900Z Stock: 179 Can Ship Immediately On Order: 17,500 Expected 2/16/2027 15,000 Expected 3/22/2027 20,000 Expected 5/3/2027 Factory Lead-Time: 27 Weeks	Cut Tape $1.65 $1.21 $1.10 $0.973 View Reel $0.82 $0.915 $0.88 $0.856 $0.82 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 featuring backup battery switch-over function in TSSOP8 package. PCF85263ATT/AJ NXP Semiconductors 1: $1.38 197In 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	197In Stock 40,000Expected 2/15/2027	Cut Tape $1.38 $1.01 $0.907 $0.803 View Reel $0.679 $0.754 $0.724 $0.709 $0.679 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 RTCs 3030 QFN-16 SPI HH:MM:SS:hh YY-MM-DD-dd AB0815-T3 ABRACON 1: $3.50 82In Stock 6,000On Order	Mfr. Part # AB0815-T3 Mouser Part # 815-AB0815-T3	ABRACON	Real Time Clock RTCs 3030 QFN-16 SPI HH:MM:SS:hh YY-MM-DD-dd Learn More about ABRACON ab08xx	Datasheet	82In Stock 6,000On Order On Order Ship Dates Mfr. #: AB0815-T3 Stock: 82 Can Ship Immediately On Order: 3,000 Expected 3/15/2027 3,000 Expected 6/11/2027 Factory Lead-Time: 28 Weeks	Cut Tape $3.50 $2.63 $2.41 $2.13 View Reel $1.69 $1.89 $1.83 $1.75 $1.69 MouseReel Available	Min.: 1 Mult.: 1 : 3,000	SPI	YY-MM-DD-dd	HH:MM:SS:hh (12 hr, 24 hr)	QFN-16	Backup Switching	1.7 V	3.6 V	- 40 C	+ 85 C	AB08x5	SMD/SMT			Reel, Cut Tape, MouseReel
Real Time Clock 32.768 KHZ AB1805-T3 ABRACON 1: $3.50 14In Stock 24,000On Order	Mfr. Part # AB1805-T3 Mouser Part # 815-AB1805-T3	ABRACON	Real Time Clock 32.768 KHZ Learn More about ABRACON ab08xx	Datasheet	14In Stock 24,000On Order On Order Ship Dates Mfr. #: AB1805-T3 Stock: 14 Can Ship Immediately On Order: 3,000 Expected 11/20/2026 9,000 Expected 12/7/2026 12,000 Expected 8/2/2027 Factory Lead-Time: 28 Weeks	Cut Tape $3.50 $2.63 $2.32 $2.09 View Reel $1.72 $1.92 $1.86 $1.77 $1.72 MouseReel Available	Min.: 1 Mult.: 1 : 3,000	I2C	YY-MM-DD-dd	HH:MM:SS:hh (12 hr, 24 hr)	QFN-16	Backup Switching	1.7 V	3.6 V	- 40 C	+ 85 C	AB18x5	SMD/SMT			Reel, Cut Tape, MouseReel
Real Time Clock 32.768 KHZ AB1815-T3 ABRACON 1: $3.50 82In Stock 3,000Expected 12/11/2026	Mfr. Part # AB1815-T3 Mouser Part # 815-AB1815-T3	ABRACON	Real Time Clock 32.768 KHZ Learn More about ABRACON ab08xx	Datasheet	82In Stock 3,000Expected 12/11/2026	Cut Tape $3.50 $2.63 $2.41 $2.09 View Reel $1.58 $1.88 $1.82 $1.76 $1.58 MouseReel Available	Min.: 1 Mult.: 1 : 3,000	SPI	YY-MM-DD-dd	HH:MM:SS:hh (12 hr, 24 hr)	QFN-16	Backup Switching	1.7 V	3.6 V	- 40 C	+ 85 C	AB18x5	SMD/SMT			Reel, Cut Tape, MouseReel
Real Time Clock Timer Control Periph eral A 926-DP8570AV A 926-DP8570AVX/NOPB DP8570AV/NOPB Texas Instruments 1: $53.09 7In Stock	Mfr. Part # DP8570AV/NOPB Mouser Part # 926-DP8570AV/NOPB	Texas Instruments	Real Time Clock Timer Control Periph eral A 926-DP8570AV A 926-DP8570AVX/NOPB	Datasheet	7In Stock	$53.09 $43.49 $40.63 $38.66 View $37.70 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	DP8570A	SMD/SMT		400 uA	Tube
Real Time Clock REAL TIME CLK/CLNDR W/TEMP COMP 8 L ISL12022IBZ-T7A Renesas / Intersil 1: $5.32 47In Stock 2,500On Order	Mfr. Part # ISL12022IBZ-T7A Mouser Part # 968-ISL12022IBZ-T7A	Renesas / Intersil	Real Time Clock REAL TIME CLK/CLNDR W/TEMP COMP 8 L	Datasheet	47In Stock 2,500On Order On Order Ship Dates Mfr. #: ISL12022IBZ-T7A Stock: 47 Can Ship Immediately On Order: 1,000 Expected 7/26/2027 1,500 Expected 7/30/2027 Factory Lead-Time: 36 Weeks	Cut Tape $5.32 $4.05 $3.74 $3.39 Reel $3.22 View $3.09 $3.03 $2.98 Quote MouseReel Available	Min.: 1 Mult.: 1 : 250	Serial 2-Wire, I2C	YY-MM-DD-dd	HH:MM:SS (24 hr)	SOIC-8	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 ENHANC CD ESD & MOISTURESIS ISL12022MAIBZ-T Renesas / Intersil 1: $7.72 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 $7.72 $5.96 $5.52 $5.03 Reel $4.52 View $4.73 $4.72 $4.36 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: $7.52 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 $7.52 $5.80 $5.37 $4.90 Reel $4.40 View $4.60 $4.24 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 ISL12057IBZ-T Renesas / Intersil 1: $2.85 97In Stock 17,500On Order	Mfr. Part # ISL12057IBZ-T Mouser Part # 968-ISL12057IBZ-T	Renesas / Intersil	Real Time Clock REAL TIME CLK W/ ALARM DS1337 COMP	Datasheet	97In Stock 17,500On Order On Order Ship Dates Mfr. #: ISL12057IBZ-T Stock: 97 Can Ship Immediately On Order: 7,500 Expected 4/16/2027 10,000 Expected 6/14/2027 Factory Lead-Time: 36 Weeks	Cut Tape $2.85 $2.13 $1.95 $1.75 Reel $1.54 View $1.66 $1.60 $1.57 $1.45 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	3.6 V	- 40 C	+ 85 C	ISL12057	SMD/SMT		500 nA	Reel, Cut Tape, MouseReel
Real Time Clock REAL TIME CLK W/ ALARM DS1337 COMP ISL12057IUZ Renesas / Intersil 1: $2.97 751In Stock 6,450On Order	Mfr. Part # ISL12057IUZ Mouser Part # 968-ISL12057IUZ	Renesas / Intersil	Real Time Clock REAL TIME CLK W/ ALARM DS1337 COMP	Datasheet	751In Stock 6,450On Order On Order Ship Dates Mfr. #: ISL12057IUZ Stock: 751 Can Ship Immediately On Order: 3,100 Expected 1/25/2027 3,350 Expected 3/8/2027 Factory Lead-Time: 36 Weeks	$2.97 $2.22 $1.94 $1.81 View $1.71 $1.65 $1.57 $1.53 $1.50	Min.: 1 Mult.: 1	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		500 nA	Tube
Real Time Clock REAL TIME CLK W/ ALARM & TIMR FUNCTNS ISL12058IBZ Renesas / Intersil 1: $2.85 566In Stock	Mfr. Part # ISL12058IBZ Mouser Part # 968-ISL12058IBZ	Renesas / Intersil	Real Time Clock REAL TIME CLK W/ ALARM & TIMR FUNCTNS	Datasheet	566In Stock	$2.85 $2.13 $1.95 $1.75 View $1.66 $1.61 $1.51 $1.46 $1.44	Min.: 1 Mult.: 1	I2C	YY-MM-DD-dd	HH:MM:SS (24 hr)	SOIC-8	No Backup Switching	1.8 V	3.6 V	- 40 C	+ 85 C	ISL12058	SMD/SMT		400 nA	Tube
Real Time Clock RTC I2c Serial IC 1.8 to 5.5V 32kHz 1337AGDVGI Renesas Electronics 1: $2.90 5In Stock 768Expected 1/10/2028	Mfr. Part # 1337AGDVGI Mouser Part # 972-1337AGDVGI	Renesas Electronics	Real Time Clock RTC I2c Serial IC 1.8 to 5.5V 32kHz	Datasheet	5In Stock 768Expected 1/10/2028	$2.90 $2.17	Min.: 1 Mult.: 1				MSOP-8						1337AGD	SMD/SMT		725 nA	Tube
Real Time Clock .9RTC BASE 1338-31DCGI8 Renesas Electronics 1: $3.93 5In Stock 6,000Expected 1/10/2028	Mfr. Part # 1338-31DCGI8 Mouser Part # 972-1338-31DCGI8	Renesas Electronics	Real Time Clock .9RTC BASE	Datasheet	5In Stock 6,000Expected 1/10/2028	Cut Tape $3.93 $2.93 $2.68 $2.41 View Reel $2.24 $2.27 $2.24 $2.24 MouseReel Available	Min.: 1 Mult.: 1 : 3,000	Serial 2-Wire, I2C	YY-MM-DD-dd	HH:MM:SS:hh (12 hr, 24 hr)	SOIC-8	Backup Switching	1.3 V	3.7 V	- 40 C	+ 85 C	1338	SMD/SMT		2 uA	Reel, Cut Tape, MouseReel
Real Time Clock Automotive tiny Real-Time Clock/calendar with alarm function and I2C-bus PCA85063ATT/AJ NXP Semiconductors 1: $1.79 13In Stock 12,500On Order NRND	Mfr. Part # PCA85063ATT/AJ Mouser Part # 771-PCA85063ATT/AJ NRND	NXP Semiconductors	Real Time Clock Automotive tiny Real-Time Clock/calendar with alarm function and I2C-bus	Datasheet	13In Stock 12,500On Order On Order Ship Dates Mfr. #: PCA85063ATT/AJ Stock: 13 Can Ship Immediately On Order: 5,000 Expected 1/14/2027 7,500 Expected 2/1/2027 Factory Lead-Time: 27 Weeks	Cut Tape $1.79 $1.32 $1.16 $1.03 View Reel $0.845 $0.96 $0.923 $0.906 $0.845 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	+ 105 C	PCA85063A	SMD/SMT	AEC-Q100		Reel, Cut Tape, MouseReel
Real Time Clock 4096k NV SRAM with Phantom Clock DS1251W-120IND+ Analog Devices / Maxim Integrated 1: $89.50 2In Stock	Mfr. Part # DS1251W-120IND+ Mouser Part # 700-DS1251W-120IND	Analog Devices / Maxim Integrated	Real Time Clock 4096k NV SRAM with Phantom Clock	Datasheet	2In Stock	$89.50 $74.53 $67.80 $64.25 View Quote	Min.: 1 Mult.: 1	Parallel	YY-MM-DD-dd	HH:MM:SS:hh (12 hr, 24 hr)	EDIP-32		2.97 V	3.63 V	- 40 C	+ 85 C	DS1251W	Through Hole		5 mA	Tube