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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 (SGD) 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 64B SRAM MCP7940NT-I/SN Microchip Technology 1: $1.25 41,676In Stock	Mfr. Part No. MCP7940NT-I/SN Mouser Part No 579-MCP7940NT-I/SN	Microchip Technology	Real Time Clock I2C GP RTCC 64B SRAM Learn More about Microchip Technology microchip mcp7940n calendar	Datasheet	41,676In Stock	Cut Tape $1.25 Reel $1.05 MouseReel Available	Min.: 1 Mult.: 1 : 3,300	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		Reel, Cut Tape, MouseReel
Real Time Clock I2C GP RTCC 1Kb EE 64B SRAM ID MCP79410T-I/SN Microchip Technology 1: $1.51 14,619In Stock	Mfr. Part No. MCP79410T-I/SN Mouser Part No 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 $1.51 Reel $1.26 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 64 x 8, Serial, I C Real-Time Clock DS1307Z+T&R Analog Devices / Maxim Integrated 1: $7.96 10,524In Stock	Mfr. Part No. DS1307Z+T&R Mouser Part No 700-DS1307ZT&R	Analog Devices / Maxim Integrated	Real Time Clock 64 x 8, Serial, I C Real-Time Clock Learn More about Analog Devices / Maxim Integrated maxim ds1307	Datasheet	10,524In Stock	Cut Tape $7.96 $6.07 $5.59 $5.07 $4.98 Reel $4.22 MouseReel Available	Min.: 1 Mult.: 1 Max.: 8,419 : 2,500	I2C	YY-MM-DD	HH:MM:SS:hh (12 hr, 24 hr)	SOIC-8	Backup Switching	4.5 V	5.5 V	0 C	+ 70 C	DS1307Z	SMD/SMT		Reel, Cut Tape, MouseReel
Real Time Clock I C RTC with Trickle Charger DS1340U-33+T&R Analog Devices / Maxim Integrated 1: $8.85 5,993In Stock	Mfr. Part No. DS1340U-33+T&R Mouser Part No 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 $8.85 $6.79 $6.27 $5.71 $5.56 Reel $4.88 MouseReel Available	Min.: 1 Mult.: 1 Max.: 4,794 : 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: $95.50 454In Stock	Mfr. Part No. DS1746-70+ Mouser Part No 700-DS1746-70	Analog Devices / Maxim Integrated	Real Time Clock Y2K-Compliant, Nonvolatile Timekeeping R	Datasheet	454In Stock	$95.50 $78.88 $74.72 $73.78 Quote Quote	Min.: 1 Mult.: 1 Max.: 363	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+TRL Analog Devices / Maxim Integrated 1: $19.09 4,428In Stock	Mfr. Part No. DS3232MZ+TRL Mouser Part No 700-DS3232MZ+TRL	Analog Devices / Maxim Integrated	Real Time Clock 5ppm, I C Real-Time Clock with SRAM	Datasheet	4,428In Stock	Cut Tape $19.09 $15.00 $13.97 $12.85 View Reel $11.26 $12.65 $12.27 $12.12 $11.26 MouseReel Available	Min.: 1 Mult.: 1 Max.: 3,542 : 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: $22.02 7,995In Stock	Mfr. Part No. DS3232SN#T&R Mouser Part No 700-DS3232SN#T&R-	Analog Devices / Maxim Integrated	Real Time Clock Extremely Accurate I C RTC with Integrat	Datasheet	7,995In Stock	Cut Tape $22.02 $17.44 $16.25 $14.92 View Reel $13.59 $14.78 $13.91 $13.59 Quote MouseReel Available	Min.: 1 Mult.: 1 Max.: 6,396 : 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: $1.47 4,889In Stock	Mfr. Part No. TLC3555QDRQ1 Mouser Part No 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	4,889In Stock	Cut Tape $1.47 $1.05 $0.942 $0.83 View Reel $0.718 $0.775 $0.743 $0.718 $0.718 MouseReel Available	Min.: 1 Mult.: 1 Max.: 1,001 : 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: $2.48 12,000In Stock 12,000Expected 4/1/2027	Mfr. Part No. PCF85053ATKJ Mouser Part No 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	12,000In Stock 12,000Expected 4/1/2027	Cut Tape $2.48 $1.81 $1.65 $1.47 View Reel $1.21 $1.39 $1.32 $1.24 $1.21 MouseReel Available	Min.: 1 Mult.: 1 : 6,000										PCF85053A	SMD/SMT		Reel, Cut Tape, MouseReel
Real Time Clock Serial 512 (64x8) M41ST85WMX6TR STMicroelectronics 1: $14.72 2,210In Stock	Mfr. Part No. M41ST85WMX6TR Mouser Part No 511-M41ST85WMX6TR	STMicroelectronics	Real Time Clock Serial 512 (64x8)	Datasheet	2,210In Stock	Cut Tape $14.72 $11.49 $10.58 $9.71 View Reel $8.91 $9.29 $9.19 $8.91 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: $14.51 6,229In Stock	Mfr. Part No. M41T93RMY6F Mouser Part No 511-M41T93RMY6F	STMicroelectronics	Real Time Clock Serial SPI bus RTC	Datasheet	6,229In Stock	Cut Tape $14.51 $11.33 $10.54 $9.67 View Reel $8.77 $9.25 $9.15 $8.77 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: $15.08 2,869In Stock	Mfr. Part No. M41T94MH6F Mouser Part No 511-M41T94MH6F	STMicroelectronics	Real Time Clock Serial 512 (64x8)	Datasheet	2,869In Stock	Cut Tape $15.08 $11.91 $11.08 $10.17 Reel $8.92 View $9.86 $9.28 $8.64 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: $49.45 936In Stock	Mfr. Part No. M48T08-100PC1 Mouser Part No 511-M48T0810PC1	STMicroelectronics	Real Time Clock 64K (8Kx8) 100ns	Datasheet	936In Stock	$49.45 $37.10 $35.39 $34.14 View $32.98 $32.88	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: $59.95 944In Stock	Mfr. Part No. M48T12-150PC1 Mouser Part No 511-M48T1215PC1	STMicroelectronics	Real Time Clock 16K (2Kx8) 150ns	Datasheet	944In Stock	$59.95 $48.42 $46.12 $44.70 View $42.96 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: $63.87 1,351In Stock	Mfr. Part No. M48T18-100PC1 Mouser Part No 511-M48T1810PC1	STMicroelectronics	Real Time Clock 64K (8Kx8) 100ns	Datasheet	1,351In Stock	$63.87 $51.63 $48.46 $47.48	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: $31.82 1,036In Stock	Mfr. Part No. M48T58Y-70MH1F Mouser Part No 511-M48T58Y-70MH1F	STMicroelectronics	Real Time Clock 64K (8Kx8) 70ns	Datasheet	1,036In Stock	Cut Tape $31.82 $25.45 $23.85 $22.10 View Reel $20.56 $21.41 $20.56 $20.56 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: $5.93 7,641In Stock	Mfr. Part No. PCA2131TF/Q900Y Mouser Part No 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	7,641In Stock	Cut Tape $5.93 $4.53 $4.18 $3.82 View Reel $3.24 $3.64 $3.59 $3.32 $3.28 $3.24	Min.: 1 Mult.: 1 : 4,000										PCA2131		AEC-Q100	Reel, Cut Tape
Real Time Clock RTC IC with 400 kHz I2C interface in SO8 package. PCF85063AT/AY NXP Semiconductors 1: $1.22 45,465In Stock	Mfr. Part No. PCF85063AT/AY Mouser Part No 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	45,465In Stock	Cut Tape $1.22 $0.874 $0.787 $0.692 Reel $0.566 View $0.645 $0.616 $0.592 $0.551 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: $1.16 53,538In Stock	Mfr. Part No. PCF85063ATL/1,118 Mouser Part No 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	53,538In Stock	Cut Tape $1.16 $0.827 $0.745 $0.653 View Reel $0.518 $0.607 $0.579 $0.558 $0.547 $0.518 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: $2.05 156,029In Stock	Mfr. Part No. PCF85263AT/AJ Mouser Part No 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	156,029In Stock	Cut Tape $2.05 $1.50 $1.34 $1.19 Reel $1.00 View $1.12 $1.07 $1.06 $0.982 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 featuring backup battery switch-over function in HXSON10 package. PCF85263ATL/AX NXP Semiconductors 1: $1.81 77,601In Stock	Mfr. Part No. PCF85263ATL/AX Mouser Part No 771-PCF85263ATL/AX	NXP Semiconductors	Real Time Clock RTC IC with 400 kHz I2C interface featuring backup battery switch-over function in HXSON10 package. Learn More about NXP Semiconductors nxp pcf85263a rtc	Datasheet	77,601In Stock	Cut Tape $1.81 $1.30 $1.18 $1.04 View Reel $0.855 $0.974 $0.934 $0.903 $0.889 $0.855 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	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: $1.74 46,881In Stock	Mfr. Part No. PCF8563T/5,518 Mouser Part No 771-PCF8563T/5518	NXP Semiconductors	Real Time Clock RTC IC with 400 kHz I2C interface in SO8 package.	Datasheet	46,881In Stock	Cut Tape $1.74 $1.29 $1.18 $1.06 Reel $0.895 View $1.00 $0.964 $0.93 $0.876 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: $4.31 1,167In Stock	Mfr. Part No. RV-3129-C3 32.768kHz OPTION B TA QC Mouser Part No 428-203634-MG01	Micro Crystal	Real Time Clock 32.768kHz I2C Time Acc. 25ppm Learn More about Micro Crystal real time clock modules	Datasheet	1,167In Stock	Cut Tape $4.31 $3.24 $2.96 $2.67 Reel $2.46 View $2.53 $2.42 $2.39 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 SPI Time Acc. 25ppm AEC RV-3149-C3 32.768kHz OPTION B TB QA Micro Crystal 1: $5.02 1,381In Stock	Mfr. Part No. RV-3149-C3 32.768kHz OPTION B TB QA Mouser Part No 428-203684-MG01	Micro Crystal	Real Time Clock 32.768kHz SPI Time Acc. 25ppm AEC Learn More about Micro Crystal real time clock modules	Datasheet	1,381In Stock	Cut Tape $5.02 $3.78 $3.47 $3.13 Reel $2.87 View $2.96 $2.92 $2.80 MouseReel Available	Min.: 1 Mult.: 1 : 1,000	SPI	YY-MM-DD-dd	HH:MM:SS (24 hr)		Backup Switching	1.3 V	5.5 V	- 40 C	+ 125 C	RV-3149	SMD/SMT		Reel, Cut Tape, MouseReel
Real Time Clock 32.768kHz I2C 2.5ppm 3.2x1.5x0.8mm Temperature Sensor & Real Time Clock RV-3032-C7 32.768kHz-2.5PPM-TA-QC Micro Crystal 1: $4.50 1,393In Stock 36,000Expected 18/12/2026	Mfr. Part No. RV-3032-C7 32.768kHz-2.5PPM-TA-QC Mouser Part No 428-203803-MG01	Micro Crystal	Real Time Clock 32.768kHz I2C 2.5ppm 3.2x1.5x0.8mm Temperature Sensor & Real Time Clock Learn More about Micro Crystal rv 3032 c7 rtc module	Datasheet	1,393In Stock 36,000Expected 18/12/2026	Cut Tape $4.50 $3.37 $3.10 $2.79 Reel $2.54 View $2.64 $2.58 $2.50 $2.27 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		Reel, Cut Tape, MouseReel