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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.	RTC Bus Interface	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 Built-In TXCO Real Time Clock Module with I2C Bus AB-RTC-TC-32.768kHz-2-T ABRACON 1: $3.68 2,049In Stock New Product	Mfr. Part No. AB-RTC-TC-32.768kHz-2-T Mouser Part No 815-ABRTCTC32768K2T3 New Product	ABRACON	Real Time Clock Built-In TXCO Real Time Clock Module with I2C Bus Learn More about ABRACON ab rtc tx 32 modules	Datasheet	2,049In Stock	Cut Tape $3.68 $2.77 $2.54 $2.30 Reel $2.04 View $2.17 $2.11 $1.95 MouseReel Available	Min.: 1 Mult.: 1 : 1,300	I2C				Backup Switching	1.6 V	5.5 V	- 40 C	+ 85 C	AB-RTC-TC-32.768kHz-2	SMD/SMT	Reel, Cut Tape, MouseReel
Real Time Clock Built-In XO Real Time Clock Module with I2C Bus AB-RTC-XB-32.768kHz-2-T3 ABRACON 1: $2.65 1,968In Stock New Product	Mfr. Part No. AB-RTC-XB-32.768kHz-2-T3 Mouser Part No 815-ABRTCXB32768K2T3 New Product	ABRACON	Real Time Clock Built-In XO Real Time Clock Module with I2C Bus Learn More about ABRACON ab rtc xb 32 module	Datasheet	1,968In Stock	Cut Tape $2.65 $1.97 $1.80 $1.60 Reel $1.44 View $1.54 $1.47 $1.45 $1.42 MouseReel Available	Min.: 1 Mult.: 1 : 3,000	I2C				Backup Switching	1.2 V	5.5 V	- 40 C	+ 85 C	AB-RTC-XB-32.768kHz-2	SMD/SMT	Reel, Cut Tape, MouseReel
Real Time Clock 32.768kHz I2C 20ppm 2.0x1.2x0.7mm RV-8263-C8 32.768kHz-20PPM-TA-QC Micro Crystal 1: $1.90 4,421In Stock	Mfr. Part No. RV-8263-C8 32.768kHz-20PPM-TA-QC Mouser Part No 428-204208-MC01	Micro Crystal	Real Time Clock 32.768kHz I2C 20ppm 2.0x1.2x0.7mm Learn More about Micro Crystal rv 8263 c8 rtc modules	Datasheet	4,421In Stock	Cut Tape $1.90 $1.40 $1.24 $1.10 Reel $0.994 View $1.04 $0.996 $0.941 MouseReel Available	Min.: 1 Mult.: 1 : 1,000	I2C	YY-MM-DD-dd	HH:MM:SS:hh (12 hr, 24 hr)	SON-8		900 mV	5.5 V	- 40 C	+ 85 C	RV-8263-C8	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: $4.15 18,820In Stock 36,000Expected 2026/11/04	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	18,820In Stock 36,000Expected 2026/11/04	Cut Tape $4.15 $3.12 $2.86 $2.57 Reel $2.35 View $2.44 $2.38 $2.31 $2.09 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
Real Time Clock 32.768 KHZ IC RTC CLK AB-RTCMC-32.768kHz-EOA9-S3-DBT ABRACON 1: $8.48 3,378In Stock	Mfr. Part No. AB-RTCMC-32.768kHz-EOA9-S3-DBT Mouser Part No 815-ABMC-327EOA9S3DB	ABRACON	Real Time Clock 32.768 KHZ IC RTC CLK Learn More about ABRACON Abracon ABRTC MC	Datasheet	3,378In Stock	Cut Tape $8.48 $6.57 $5.97 $5.52 Reel $4.97 View $5.28 $5.16 $4.79 MouseReel Available	Min.: 1 Mult.: 1 : 1,000	SPI	YY-MM-DD-dd	HH:MM:SS (24 hr)		Backup Switching	1.4 V	5.5 V	- 40 C	+ 125 C	AB-RTCMC	SMD/SMT	Reel, Cut Tape, MouseReel
Real Time Clock Trickle-Charge Timekeeping Chip DS1302ZN+T&R Analog Devices / Maxim Integrated 1: $6.42 4,691In Stock	Mfr. Part No. DS1302ZN+T&R Mouser Part No 700-DS1302ZNT&R	Analog Devices / Maxim Integrated	Real Time Clock Trickle-Charge Timekeeping Chip Learn More about Analog Devices / Maxim Integrated maxim ds1302 timekeeping chip	Datasheet	4,691In Stock	Cut Tape $6.42 $4.92 $4.55 $4.14 $4.06 Reel $3.48 MouseReel Available	Min.: 1 Mult.: 1 Max.: 3,888 : 2,500	Serial 3-Wire	YY-MM-DD-dd	HH:MM:SS (24 hr)	SOIC-8	Backup Switching	2 V	5.5 V	- 40 C	+ 85 C	DS1302ZN	SMD/SMT	Reel, Cut Tape, MouseReel
Real Time Clock 64 x 8, Serial, I C Real-Time Clock DS1307Z+ Analog Devices / Maxim Integrated 1: $5.70 4,249In Stock	Mfr. Part No. DS1307Z+ Mouser Part No 700-DS1307Z	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	4,249In Stock	$5.70 $4.35 $4.02 $3.63 View $3.44 $3.34 $3.28 $3.26	Min.: 1 Mult.: 1 Max.: 3,399	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	Tube
Real Time Clock 64 x 8, Serial, I C Real-Time Clock DS1307Z+T&R Analog Devices / Maxim Integrated 1: $5.85 10,847In 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	10,847In Stock	Cut Tape $5.85 $4.47 $4.11 $3.73 $3.66 Reel $3.12 MouseReel Available	Min.: 1 Mult.: 1 Max.: 8,759 : 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: $6.51 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 $6.51 $4.99 $4.61 $4.20 $4.09 Reel $3.59 MouseReel Available	Min.: 1 Mult.: 1 Max.: 4,866 : 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 Low-Voltage SPI/3-Wire RTCs with Trickle DS1394U-33+T&R Analog Devices / Maxim Integrated 1: $6.48 5,088In Stock	Mfr. Part No. DS1394U-33+T&R Mouser Part No 700-DS1394U-33T&R	Analog Devices / Maxim Integrated	Real Time Clock Low-Voltage SPI/3-Wire RTCs with Trickle	Datasheet	5,088In Stock	Cut Tape $6.48 $4.97 $4.59 $4.18 View Reel $3.70 $3.97 $3.90 $3.88 $3.70 MouseReel Available	Min.: 1 Mult.: 1 Max.: 4,070 : 3,000	Serial 3-Wire, SPI	YY-MM-DD-dd	HH:MM:SS:hh (12 hr, 24 hr)	uSOP-10	Backup Switching	2.97 V	5.5 V	- 40 C	+ 85 C	DS1394U	SMD/SMT	Reel, Cut Tape, MouseReel
Real Time Clock Y2K-Compliant, Nonvolatile Timekeeping R DS1746-70+ Analog Devices / Maxim Integrated 1: $70.23 487In 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	487In Stock	$70.23 $58.01 $54.95 $54.27 $54.25	Min.: 1 Mult.: 1 Max.: 389	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: $14.04 5,111In 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	5,111In Stock	Cut Tape $14.04 $11.04 $10.27 $9.46 View Reel $8.28 $9.30 $9.02 $8.91 $8.28 MouseReel Available	Min.: 1 Mult.: 1 Max.: 4,091 : 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: $16.19 9,003In 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	9,003In Stock	Cut Tape $16.19 $12.83 $11.96 $10.97 View Reel $9.99 $10.87 $10.23 $9.99 Quote MouseReel Available	Min.: 1 Mult.: 1 Max.: 7,197 : 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: $1.08 4,853In 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	4,853In Stock	Cut Tape $1.08 $0.77 $0.693 $0.611 View Reel $0.528 $0.57 $0.547 $0.528 $0.528 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 32.768 kHz +/-20 PPM I2C -40/+85C RV-4162-C7-32.768kHz-20PPM-TA-QC Micro Crystal 1: $3.34 15,472In Stock	Mfr. Part No. RV-4162-C7-32.768kHz-20PPM-TA-QC Mouser Part No 428-200007-MG01	Micro Crystal	Real Time Clock 32.768 kHz +/-20 PPM I2C -40/+85C Learn More about Micro Crystal real time clock modules	Datasheet	15,472In Stock	Cut Tape $3.34 $2.49 $2.26 $2.04 Reel $1.78 View $1.92 $1.86 $1.74 $1.71 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 V	4.4 V	- 40 C	+ 85 C	RV-4162-C7	SMD/SMT	Reel, Cut Tape, MouseReel
Real Time Clock Serial I2C bus RTC M41T82ZM6F STMicroelectronics 1: $3.55 7,928In Stock	Mfr. Part No. M41T82ZM6F Mouser Part No 511-M41T82ZM6F	STMicroelectronics	Real Time Clock Serial I2C bus RTC	Datasheet	7,928In Stock	Cut Tape $3.55 $2.67 $2.45 $2.20 Reel $1.94 View $2.08 $2.04 $1.97 $1.91 MouseReel Available	Min.: 1 Mult.: 1 : 2,500	Serial	YY-MM-DD-dd	HH:MM:SS:hh (12 hr, 24 hr)	SOIC-8	Backup Switching	2.38 V	5.5 V	- 40 C	+ 85 C	M41T82	SMD/SMT	Reel, Cut Tape, MouseReel
Real Time Clock Serial SPI bus RTC M41T93RMY6F STMicroelectronics 1: $10.68 2,229In Stock 4,000Expected 2026/10/13	Mfr. Part No. M41T93RMY6F Mouser Part No 511-M41T93RMY6F	STMicroelectronics	Real Time Clock Serial SPI bus RTC	Datasheet	2,229In Stock 4,000Expected 2026/10/13	Cut Tape $10.68 $8.33 $7.76 $7.11 Reel $6.45 View $6.80 $6.73 $6.28 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 64K (8Kx8) 100ns M48T18-100PC1 STMicroelectronics 1: $46.97 907In Stock 480Expected 2026/10/08	Mfr. Part No. M48T18-100PC1 Mouser Part No 511-M48T1810PC1	STMicroelectronics	Real Time Clock 64K (8Kx8) 100ns	Datasheet	907In Stock 480Expected 2026/10/08	$46.97 $37.97 $35.63 $34.91	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: $23.40 1,040In Stock	Mfr. Part No. M48T58Y-70MH1F Mouser Part No 511-M48T58Y-70MH1F	STMicroelectronics	Real Time Clock 64K (8Kx8) 70ns	Datasheet	1,040In Stock	Cut Tape $23.40 $18.71 $17.54 $16.26 View Reel $15.12 $15.75 $15.12 $15.12 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 RTC Module with I2C or SPI interface featuring backup battery switch-over function in HLSON16 package. PCF2131TFY NXP Semiconductors 1: $3.66 21,046In Stock 68,000On Order	Mfr. Part No. PCF2131TFY Mouser Part No 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	21,046In Stock 68,000On Order On Order Ship Dates Mfr. No: PCF2131TFY Stock: 21,046 Can Dispatch Immediately On Order: 36,000 Expected 2026/11/09 32,000 Expected 2027/08/16 Factory Lead Time: 16 Weeks	Cut Tape $3.66 $2.76 $2.54 $2.28 View Reel $1.88 $2.15 $2.11 $2.04 $2.01 $1.88 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: $0.90 50,539In 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	50,539In Stock	Cut Tape $0.90 $0.643 $0.579 $0.509 Reel $0.416 View $0.475 $0.454 $0.435 $0.405 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: $0.85 61,059In 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	61,059In Stock	Cut Tape $0.85 $0.608 $0.548 $0.48 View Reel $0.376 $0.447 $0.426 $0.411 $0.402 $0.376 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: $1.37 161,461In 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	161,461In Stock	Cut Tape $1.37 $1.02 $0.897 $0.793 Reel $0.672 View $0.744 $0.714 $0.692 $0.656 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: $1.33 81,323In 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	81,323In Stock	Cut Tape $1.33 $0.955 $0.864 $0.764 View Reel $0.629 $0.716 $0.687 $0.664 $0.654 $0.629 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: $1.20 27,087In Stock 24,390Expected 2026/10/21	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	27,087In Stock 24,390Expected 2026/10/21	Cut Tape $1.20 $0.933 $0.818 $0.734 Reel $0.623 View $0.688 $0.67 $0.648 $0.598 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