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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 I2C GP RTCC 1Kb EE 64B SRAM ID MCP79410T-I/SN Microchip Technology 1: $1.253 14.619In Stock	Mfr. Part # MCP79410T-I/SN Mouser Part # 579-MCP79410T-I/SN	Microchip Technology	Real Time Clock I2C GP RTCC 1Kb EE 64B SRAM ID Learn More about Microchip Technology microchip mcp794xx calendars	Datasheet	14.619In Stock	Cut Tape $1.253 Reel $1.037 MouseReel Available	Min.: 1 Mult.: 1 : 3.300	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		Reel, Cut Tape, MouseReel
Real Time Clock I C RTC with Trickle Charger DS1340U-33+T&R Analog Devices / Maxim Integrated 1: $7.417 5.993In Stock	Mfr. Part # DS1340U-33+T&R Mouser Part # 700-DS1340U-33T&R	Analog Devices / Maxim Integrated	Real Time Clock I C RTC with Trickle Charger Learn More about Analog Devices / Maxim Integrated maximds1343	Datasheet	5.993In Stock	Cut Tape $7.417 $5.685 $5.252 $4.785 $4.660 Reel $4.090 MouseReel Available	Min.: 1 Mult.: 1 : 3.000	Serial 2-Wire, I2C	YY-MM-DD-dd	HH:MM:SS (24 hr)	uSOP-8	Backup Switching	2.97 V	5.5 V	- 40 C	+ 85 C	DS1340U	SMD/SMT		Reel, Cut Tape, MouseReel
Real Time Clock Y2K-Compliant, Nonvolatile Timekeeping R DS1746-70+ Analog Devices / Maxim Integrated 1: $80.000 452In Stock	Mfr. Part # DS1746-70+ Mouser Part # 700-DS1746-70	Analog Devices / Maxim Integrated	Real Time Clock Y2K-Compliant, Nonvolatile Timekeeping R	Datasheet	452In Stock	$80.000 $66.078 $62.592 $61.806 View Quote	Min.: 1 Mult.: 1	Parallel	YY-MM-DD-dd	HH:MM:SS (24 hr)	EDIP-32	Integrated Battery	4.5 V	5.5 V	0 C	+ 70 C	DS1746	Through Hole		Tube
Real Time Clock 5ppm, I C Real-Time Clock with SRAM DS3232MZ+ Analog Devices / Maxim Integrated 1: $17.784 2.531In Stock	Mfr. Part # DS3232MZ+ Mouser Part # 700-DS3232MZ+	Analog Devices / Maxim Integrated	Real Time Clock 5ppm, I C Real-Time Clock with SRAM	Datasheet	2.531In Stock	$17.784 $13.922 $13.307 $11.302 View $11.085 $10.835 Quote	Min.: 1 Mult.: 1	I2C	YY-MM-DD-dd	HH:MM:SS:hh (12 hr, 24 hr)	SOIC-8	Backup Switching	2.3 V	4.5 V	- 40 C	+ 85 C	DS3232MZ	SMD/SMT		Tube
Real Time Clock 5ppm, I C Real-Time Clock with SRAM DS3232MZ+TRL Analog Devices / Maxim Integrated 1: $15.995 4.369In Stock	Mfr. Part # DS3232MZ+TRL Mouser Part # 700-DS3232MZ+TRL	Analog Devices / Maxim Integrated	Real Time Clock 5ppm, I C Real-Time Clock with SRAM	Datasheet	4.369In Stock	Cut Tape $15.995 $12.566 $11.700 $10.766 View Reel $9.433 $10.595 $10.276 $10.151 $9.433 Quote MouseReel Available	Min.: 1 Mult.: 1 : 2.500	Serial 2-Wire, I2C	YY-MM-DD-dd	HH:MM:SS:hh (12 hr, 24 hr)	SO-8	Backup Switching	2.3 V	4.5 V	- 40 C	+ 85 C	DS3232MZ	SMD/SMT		Reel, Cut Tape, MouseReel
Real Time Clock Extremely Accurate I C RTC with Integrat DS3232SN#T&R Analog Devices / Maxim Integrated 1: $18.445 7.995In Stock	Mfr. Part # DS3232SN#T&R Mouser Part # 700-DS3232SN#T&R-	Analog Devices / Maxim Integrated	Real Time Clock Extremely Accurate I C RTC with Integrat	Datasheet	7.995In Stock	Cut Tape $18.445 $14.606 $13.614 $12.498 View Reel $11.381 $12.384 $11.655 $11.381 Quote MouseReel Available	Min.: 1 Mult.: 1 : 1.000	I2C	YY-MM-DD-dd	HH:MM:SS:hh (12 hr, 24 hr)	SO-20	Backup Switching	2.3 V	5.5 V	- 40 C	+ 85 C	DS3232SN	SMD/SMT		Reel, Cut Tape, MouseReel
Real Time Clock Automotive high-spee d CMOS timer with i TLC3555QDRQ1 Texas Instruments 1: $1.230 4.824In Stock	Mfr. Part # TLC3555QDRQ1 Mouser Part # 595-TLC3555QDRQ1	Texas Instruments	Real Time Clock Automotive high-spee d CMOS timer with i Learn More about Texas Instruments ti tlc3555 q1 high speed cmos timer	Datasheet	4.824In Stock	Cut Tape $1.230 $877 $790 $695 Reel $574 View $649 $622 $602 $553 MouseReel Available	Min.: 1 Mult.: 1 : 3.000				SOIC-8	No Backup Switching	1.5 V	18 V	- 40 C	+ 125 C	TLC3555	SMD/SMT		Reel, Cut Tape, MouseReel
Real Time Clock RTC IC with 400 kHz I2C interface featuring 128 byte SRAM in HVSON12 package. PCF85053ATKJ NXP Semiconductors 1: $2.142 5.950In Stock 6.000Expected 1/4/2027	Mfr. Part # PCF85053ATKJ Mouser Part # 771-PCF85053ATKJ	NXP Semiconductors	Real Time Clock RTC IC with 400 kHz I2C interface featuring 128 byte SRAM in HVSON12 package. Learn More about NXP Semiconductors nxp pcf85053a rtc	Datasheet	5.950In Stock 6.000Expected 1/4/2027	Cut Tape $2.142 $1.572 $1.424 $1.276 View Reel $1.046 $1.196 $1.151 $1.132 $1.065 $1.046 MouseReel Available	Min.: 1 Mult.: 1 : 6.000										PCF85053A	SMD/SMT		Reel, Cut Tape, MouseReel
Real Time Clock Serial 512 (64x8) M41ST85WMX6TR STMicroelectronics 1: $12.327 2.197In Stock	Mfr. Part # M41ST85WMX6TR Mouser Part # 511-M41ST85WMX6TR	STMicroelectronics	Real Time Clock Serial 512 (64x8)	Datasheet	2.197In Stock	Cut Tape $12.327 $9.627 $8.864 $8.134 View Reel $7.462 $7.781 $7.702 $7.462 MouseReel Available	Min.: 1 Mult.: 1 : 1.000	Serial	YY-MM-DD-dd	HH:MM:SS:hh (12 hr, 24 hr)	SOX-28	Backup Switching	2.7 V	3.6 V	- 40 C	+ 85 C	M41ST85W	SMD/SMT		Reel, Cut Tape, MouseReel
Real Time Clock Serial SPI bus RTC M41T93RMY6F STMicroelectronics 1: $12.156 5.929In Stock	Mfr. Part # M41T93RMY6F Mouser Part # 511-M41T93RMY6F	STMicroelectronics	Real Time Clock Serial SPI bus RTC	Datasheet	5.929In Stock	Cut Tape $12.156 $9.490 $8.829 $8.100 View Reel $7.348 $7.747 $7.667 $7.348 Quote MouseReel Available	Min.: 1 Mult.: 1 : 1.000	SPI	YY-MM-DD-dd	HH:MM:SS:hh (12 hr, 24 hr)	SOX-18	Backup Switching	2.7 V	5.5 V	- 40 C	+ 85 C	M41T93	SMD/SMT		Reel, Cut Tape, MouseReel
Real Time Clock Serial 512 (64x8) M41T94MH6F STMicroelectronics 1: $12.635 2.869In Stock	Mfr. Part # M41T94MH6F Mouser Part # 511-M41T94MH6F	STMicroelectronics	Real Time Clock Serial 512 (64x8)	Datasheet	2.869In Stock	Cut Tape $12.635 $9.980 $9.285 $8.522 Reel $7.474 View $8.260 $7.770 $7.234 MouseReel Available	Min.: 1 Mult.: 1 : 936	SPI	YY-MM-DD-dd	HH:MM:SS:hh (12 hr, 24 hr)	SOX-28	Backup Switching	2.7 V	5.5 V	- 40 C	+ 85 C	M41T94	SMD/SMT		Reel, Cut Tape, MouseReel
Real Time Clock 64K (8Kx8) 100ns M48T08-100PC1 STMicroelectronics 1: $41.424 885In Stock	Mfr. Part # M48T08-100PC1 Mouser Part # 511-M48T0810PC1	STMicroelectronics	Real Time Clock 64K (8Kx8) 100ns	Datasheet	885In Stock	$41.424 $31.079 $29.644 $28.596 View $27.627 $27.548	Min.: 1 Mult.: 1	Parallel	YY-MM-DD-dd	HH:MM:SS (24 hr)	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: $50.219 944In Stock	Mfr. Part # M48T12-150PC1 Mouser Part # 511-M48T1215PC1	STMicroelectronics	Real Time Clock 16K (2Kx8) 150ns	Datasheet	944In Stock	$50.219 $40.558 $38.633 $37.448 View $35.990 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) 100ns M48T18-100PC1 STMicroelectronics 1: $53.500 1.351In Stock	Mfr. Part # M48T18-100PC1 Mouser Part # 511-M48T1810PC1	STMicroelectronics	Real Time Clock 64K (8Kx8) 100ns	Datasheet	1.351In Stock	$53.500 $43.247 $40.592 $39.772	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) 70ns M48T58Y-70MH1F STMicroelectronics 1: $26.819 1.036In Stock	Mfr. Part # M48T58Y-70MH1F Mouser Part # 511-M48T58Y-70MH1F	STMicroelectronics	Real Time Clock 64K (8Kx8) 70ns	Datasheet	1.036In Stock	Cut Tape $26.819 $21.464 $20.120 $18.650 View Reel $17.226 $18.251 $17.226 $17.226 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	M48T58Y	SMD/SMT		Reel, Cut Tape, MouseReel
Real Time Clock Automotive RTC module, featuring I2C or SPI interface in HLSON16 package. PCA2131TF/Q900Y NXP Semiconductors 1: $4.967 7.560In Stock	Mfr. Part # PCA2131TF/Q900Y Mouser Part # 771-PCA2131TF/Q900Y	NXP Semiconductors	Real Time Clock Automotive RTC module, featuring I2C or SPI interface in HLSON16 package. Learn More about NXP Semiconductors nxp pca2131 rtc	Datasheet	7.560In Stock	Cut Tape $4.967 $3.794 $3.509 $3.201 View Reel $2.711 $3.053 $3.019 $2.860 $2.848 $2.711	Min.: 1 Mult.: 1 : 4.000										PCA2131		AEC-Q100	Reel, Cut Tape
Real Time Clock RTC Module with I2C or SPI interface featuring backup battery switch-over function in HLSON16 package. PCF2131TFY NXP Semiconductors 1: $4.318 26.144In Stock 80.000On Order	Mfr. Part # PCF2131TFY Mouser Part # 771-PCF2131TFY	NXP Semiconductors	Real Time Clock RTC Module with I2C or SPI interface featuring backup battery switch-over function in HLSON16 package. Learn More about NXP Semiconductors nxp pcf2131 rtc	Datasheet	26.144In Stock 80.000On Order On Order Ship Dates Mfr. #: PCF2131TFY Stock: 26.144 Can Ship Immediately On Order: 4.000 Expected 11/2/2026 32.000 Expected 11/1/2027 44.000 Expected 12/6/2027 Factory Lead-Time: 16 Weeks	Cut Tape $4.318 $3.236 $2.962 $2.666 View Reel $2.210 $2.518 $2.449 $2.324 $2.290 $2.210 MouseReel Available	Min.: 1 Mult.: 1 : 4.000	Serial, I2C, SPI	YY-MM-DD-dd	HH:MM:SS:hh (12 hr, 24 hr)		Backup Switching	1.2 V	5.5 V	- 40 C	+ 85 C	PCF2131	SMD/SMT		Reel, Cut Tape, MouseReel
Real Time Clock RTC IC with 400 kHz I2C interface in SO8 package. PCF85063AT/AY NXP Semiconductors 1: $1.025 44.767In Stock	Mfr. Part # PCF85063AT/AY Mouser Part # 771-PCF85063AT/AY	NXP Semiconductors	Real Time Clock RTC IC with 400 kHz I2C interface in SO8 package. Learn More about NXP Semiconductors nxp pcf85063 clocks	Datasheet	44.767In Stock	Cut Tape $1.025 $733 $660 $580 Reel $474 View $540 $516 $496 $461 MouseReel Available	Min.: 1 Mult.: 1 : 2.500	I2C	YY-MM-DD-dd	HH:MM:SS:hh (12 hr, 24 hr)	SOIC-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 I2C interface in HXSON10 package. PCF85063ATL/1,118 NXP Semiconductors 1: $968 46.316In Stock 28.000Expected 2/12/2027	Mfr. Part # PCF85063ATL/1,118 Mouser Part # 771-PCF85063ATL1118	NXP Semiconductors	Real Time Clock RTC IC with 400 kHz I2C interface in HXSON10 package. Learn More about NXP Semiconductors nxp pcf85063 clocks	Datasheet	46.316In Stock 28.000Expected 2/12/2027	Cut Tape $968 $693 $624 $547 View Reel $434 $508 $485 $467 $458 $434 MouseReel Available	Min.: 1 Mult.: 1 : 4.000	I2C	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	PCF85063A	SMD/SMT		Reel, Cut Tape, MouseReel
Real Time Clock RTC IC with 400 kHz I2C interface featuring backup battery switch-over function in SO8 package. PCF85263AT/AJ NXP Semiconductors 1: $1.720 154.924In Stock	Mfr. Part # PCF85263AT/AJ Mouser Part # 771-PCF85263AT/AJ	NXP Semiconductors	Real Time Clock RTC IC with 400 kHz I2C interface featuring backup battery switch-over function in SO8 package. Learn More about NXP Semiconductors nxp pcf85263a rtc	Datasheet	154.924In Stock	Cut Tape $1.720 $1.253 $1.123 $997 Reel $832 View $936 $900 $889 $813 MouseReel Available	Min.: 1 Mult.: 1 : 2.500	Serial 2-Wire, I2C	YY-MM-DD-dd	HH:MM:SS:hh (12 hr, 24 hr)	SO-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 in SO8 package. PCF8563T/5,518 NXP Semiconductors 1: $1.424 46.701In Stock	Mfr. Part # PCF8563T/5,518 Mouser Part # 771-PCF8563T/5518	NXP Semiconductors	Real Time Clock RTC IC with 400 kHz I2C interface in SO8 package.	Datasheet	46.701In Stock	Cut Tape $1.424 $1.162 $974 $873 View Reel $747 $825 $796 $772 $747 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	5.5 V	- 40 C	+ 85 C	PCF8563	SMD/SMT		Reel, Cut Tape, MouseReel
Real Time Clock 32.768kHz I2C Time Acc. 25ppm RV-3129-C3 32.768kHz OPTION B TA QC Micro Crystal 1: $3.612 1.287In Stock	Mfr. Part # RV-3129-C3 32.768kHz OPTION B TA QC Mouser Part # 428-203634-MG01	Micro Crystal	Real Time Clock 32.768kHz I2C Time Acc. 25ppm Learn More about Micro Crystal real time clock modules	Datasheet	1.287In Stock	Cut Tape $3.612 $2.711 $2.484 $2.233 Reel $2.062 View $2.119 $2.028 $2.005 MouseReel Available	Min.: 1 Mult.: 1 : 1.000	I2C	YY-MM-DD-dd	HH:MM:SS (24 hr)		Backup Switching	1.3 V	5.5 V	- 40 C	+ 85 C	RV-3129	SMD/SMT		Reel, Cut Tape, MouseReel
Real Time Clock 32.768kHz I2C 2.5ppm 3.2x1.5x0.8 AECQ200 Temperature Sensor & Real Time Clock RV-3032-C7 32.768kHz-2.5PPM-TA-QA Micro Crystal 1: $3.862 2.286In Stock 5.000Expected 1/1/2027	Mfr. Part # RV-3032-C7 32.768kHz-2.5PPM-TA-QA Mouser Part # 428-203853-MG01	Micro Crystal	Real Time Clock 32.768kHz I2C 2.5ppm 3.2x1.5x0.8 AECQ200 Temperature Sensor & Real Time Clock Learn More about Micro Crystal rv 3032 c7 rtc module	Datasheet	2.286In Stock 5.000Expected 1/1/2027	Cut Tape $3.862 $2.905 $2.655 $2.392 Reel $2.187 View $2.267 $2.233 $2.142 $2.108 MouseReel Available	Min.: 1 Mult.: 1 : 1.000	Serial 2-Wire, I2C	YY-MM-DD-dd	HH:MM:SS:hh (12 hr, 24 hr)		Backup Switching	1.3 V	5.5 V	- 40 C	+ 105 C	RV-3032-C7	SMD/SMT	AEC-Q200	Reel, Cut Tape, MouseReel
Real Time Clock I2C GP RTCC 64B SRAM ID MCP79400T-I/MS Microchip Technology 1: $1.208 4.252In Stock	Mfr. Part # MCP79400T-I/MS Mouser Part # 579-MCP79400TIMS	Microchip Technology	Real Time Clock I2C GP RTCC 64B SRAM ID Learn More about Microchip Technology microchip mcp7940n calendar	Datasheet	4.252In Stock	Cut Tape $1.208 Reel $1.008	Min.: 1 Mult.: 1 : 2.500	Serial 2-Wire, I2C	YY-MM-DD-dd	HH:MM:SS:hh (12 hr, 24 hr)		Backup Switching	1.8 V	5.5 V	- 40 C	+ 85 C		SMD/SMT		Reel, Cut Tape
Real Time Clock I2C GP RTCC 64B SRAM ID MCP79400T-I/SN Microchip Technology 1: $1.151 7.530In Stock	Mfr. Part # MCP79400T-I/SN Mouser Part # 579-MCP79400TISN	Microchip Technology	Real Time Clock I2C GP RTCC 64B SRAM ID Learn More about Microchip Technology microchip mcp7940n calendar	Datasheet	7.530In Stock	Cut Tape $1.151 Reel $965	Min.: 1 Mult.: 1 : 3.300	Serial 2-Wire, I2C	YY-MM-DD-dd	HH:MM:SS:hh (12 hr, 24 hr)		Backup Switching	1.8 V	5.5 V	- 40 C	+ 85 C		SMD/SMT		Reel, Cut Tape