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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 (GBP) 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 Real-time Clock Mod I2C Bus PT7C4337WEX Diodes Incorporated 1: £0.811 3,983In Stock	Mfr. Part No. PT7C4337WEX Mouser Part No 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 £0.811 £0.581 £0.507 £0.461 View Reel £0.385 £0.444 £0.436 £0.428 £0.385 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: £1.24 2,819In Stock 52,500On Order	Mfr. Part No. PCA85073ADP/Q900Z Mouser Part No 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	2,819In Stock 52,500On Order On Order Ship Dates Mfr. No: PCA85073ADP/Q900Z Stock: 2,819 Can Dispatch Immediately On Order: 17,500 Expected 16/02/2027 15,000 Expected 22/03/2027 20,000 Expected 06/05/2027 Factory Lead Time: 27 Weeks	Cut Tape £1.24 £0.908 £0.826 £0.731 View Reel £0.615 £0.687 £0.661 £0.643 £0.615 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 SPI Interface in HXSON10 package. PCF85063BTL/1,118 NXP Semiconductors 1: £0.601 13,377In Stock	Mfr. Part No. PCF85063BTL/1,118 Mouser Part No 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 £0.601 £0.435 £0.395 £0.36 View Reel £0.286 £0.335 £0.32 £0.311 £0.303 £0.286 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: £1.04 197In Stock 40,000Expected 15/02/2027	Mfr. Part No. PCF85263ATT/AJ Mouser Part No 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 15/02/2027	Cut Tape £1.04 £0.759 £0.681 £0.603 View Reel £0.51 £0.566 £0.544 £0.533 £0.51 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: £1.09 5,391In Stock 7,500Expected 07/12/2026	Mfr. Part No. PCF85263ATT1/AZ Mouser Part No 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	5,391In Stock 7,500Expected 07/12/2026	Cut Tape £1.09 £0.796 £0.717 £0.634 Reel £0.536 View £0.594 £0.57 £0.55 £0.518 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: £1.32 8,231In Stock 5,000Expected 03/05/2027	Mfr. Part No. PCF85363ATT/AJ Mouser Part No 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 03/05/2027	Cut Tape £1.32 £0.96 £0.871 £0.773 Reel £0.646 View £0.725 £0.697 £0.684 £0.636 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: £1.37 9,136In Stock 6,495Expected 10/11/2026	Mfr. Part No. PCF8563TS/5,118 Mouser Part No 771-PCF8563TS/5118	NXP Semiconductors	Real Time Clock RTC IC with 400 kHz I2C interface in TSSOP8 package.	Datasheet	9,136In Stock 6,495Expected 10/11/2026	Cut Tape £1.37 £1.00 £0.917 £0.826 Reel £0.708 View £0.78 £0.759 £0.743 £0.677 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: £3.36 2,262In Stock	Mfr. Part No. R2025S-E2-FE Mouser Part No 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 £3.36 £2.55 £2.34 £2.12 Reel £1.90 View £2.01 £1.98 £1.82 £1.75 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: £1.13 2,176In Stock	Mfr. Part No. R2043T-E2-F Mouser Part No 848-R2043TE2F	Nisshinbo	Real Time Clock 4-Wire Real Time Clock IC	Datasheet	2,176In Stock	Cut Tape £1.13 £0.826 £0.741 £0.657 Reel £0.556 View £0.617 £0.593 £0.587 £0.545 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: £1.34 4,120In Stock	Mfr. Part No. R2051S01-E2-F Mouser Part No 848-R2051S01E2F	Nisshinbo	Real Time Clock 2-Wire Real Time Clock IC	Datasheet	4,120In Stock	Cut Tape £1.34 £0.986 £0.89 £0.788 Reel £0.664 View £0.738 £0.709 £0.696 £0.65 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: £1.25 2,268In Stock	Mfr. Part No. R2221T-E2-F Mouser Part No 848-R2221TE2F	Nisshinbo	Real Time Clock 2-Wire Real Time Clock IC	Datasheet	2,268In Stock	Cut Tape £1.25 £0.917 £0.826 £0.732 Reel £0.616 View £0.689 £0.662 £0.649 £0.602 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 2-Wire Real Time Clock IC RS5C372A-E2-F Nisshinbo 1: £1.24 2,000In Stock 2,000Expected 05/01/2027	Mfr. Part No. RS5C372A-E2-F Mouser Part No 848-RS5C372AE2F	Nisshinbo	Real Time Clock 2-Wire Real Time Clock IC Learn More about Nisshinbo ricoh rtcs	Datasheet	2,000In Stock 2,000Expected 05/01/2027	Cut Tape £1.24 £0.908 £0.818 £0.721 Reel £0.61 View £0.678 £0.651 £0.643 £0.597 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-8	Backup Switching	1.7 V	6 V	- 40 C	+ 85 C	RS5C372	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: £25.07 73In Stock	Mfr. Part No. DP8573AV/NOPB Mouser Part No 926-DP8573AV/NOPB	Texas Instruments	Real Time Clock Real Time Clock A 92 6-DP8573AVX/NOPB A A 926-DP8573AVX/NOPB	Datasheet	73In Stock	£25.07 £21.51 £20.18 £18.70 £18.67	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: £2.43 3,210In Stock	Mfr. Part No. ISL12008IB8Z Mouser Part No 968-ISL12008IB8Z	Renesas / Intersil	Real Time Clock LW PWR RTC W/RESEAL 8LD	Datasheet	3,210In Stock	£2.43 £1.81 £1.66 £1.49 View £1.41 £1.34 £1.29 £1.27 £1.23	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: £5.60 433In Stock	Mfr. Part No. ISL12022MAIBZ Mouser Part No 968-ISL12022MAIBZ	Renesas / Intersil	Real Time Clock REAL TIME CLK ENHANC CD ESD & MOISTURESIS	Datasheet	433In Stock	£5.60 £4.32 £4.00 £3.64 View £3.37 £3.27 £3.11	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: £5.80 900In Stock	Mfr. Part No. ISL12022MAIBZ-T Mouser Part No 968-ISL12022MAIBZ-T	Renesas / Intersil	Real Time Clock REAL TIME CLK ENHANC CD ESD & MOISTURESIS	Datasheet	900In Stock	Cut Tape £5.80 £4.48 £4.15 £3.78 Reel £3.40 View £3.55 £3.54 £3.27 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: £5.65 585In Stock	Mfr. Part No. ISL12022MIBZ-T Mouser Part No 968-ISL12022MIBZ-T	Renesas / Intersil	Real Time Clock REAL TIME CLK & TEMP COMPENSATED CRYSTAL	Datasheet	585In Stock	Cut Tape £5.65 £4.36 £4.03 £3.68 Reel £3.30 View £3.46 £3.19 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: £2.19 5,046In Stock	Mfr. Part No. ISL12057IUZ-T Mouser Part No 968-ISL12057IUZ-T	Renesas / Intersil	Real Time Clock REAL TIME CLK W/ ALARM DS1337 COMP	Datasheet	5,046In Stock	Cut Tape £2.19 £1.63 £1.49 £1.34 Reel £1.14 View £1.27 £1.23 £1.20 £1.10 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: £2.23 1,354In Stock	Mfr. Part No. ISL1208IB8Z Mouser Part No 968-ISL1208IB8Z	Renesas / Intersil	Real Time Clock I2C REAL TIME CLOCK/ CALENDAR 8LD	Datasheet	1,354In Stock	£2.23 £1.62 £1.48 £1.33 View £1.26 £1.22 £1.16 £1.14 £1.13	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: £2.22 7,326In Stock 5,000Expected 22/03/2027	Mfr. Part No. ISL1208IB8Z-TK Mouser Part No 968-ISL1208IB8Z-TK	Renesas / Intersil	Real Time Clock I2C REAL TIME CLOCK/ CALENDAR 8LD	Datasheet	7,326In Stock 5,000Expected 22/03/2027	Cut Tape £2.22 £1.65 £1.51 £1.36 Reel £1.19 View £1.28 £1.25 £1.15 £1.13 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: £2.71 2,071In Stock	Mfr. Part No. ISL1208IU8Z Mouser Part No 968-ISL1208IU8Z	Renesas / Intersil	Real Time Clock I2C REAL TIME CLOCK/ CALENDAR 8LD	Datasheet	2,071In Stock	£2.71 £2.01 £1.72 £1.63 View £1.58 £1.57 £1.53 £1.42 £1.41	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
Real Time Clock I2CAL TIME CLK/CLNDR 8LD ISL1208IU8Z-T7A Renesas / Intersil 1: £3.82 2,869In Stock	Mfr. Part No. ISL1208IU8Z-T7A Mouser Part No 968-ISL1208IU8Z-T7A	Renesas / Intersil	Real Time Clock I2CAL TIME CLK/CLNDR 8LD	Datasheet	2,869In Stock	Cut Tape £3.82 £2.92 £2.68 £2.43 Reel £2.34 View £2.27 £2.17 £2.13 £2.07 MouseReel Available	Min.: 1 Mult.: 1 : 250	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		Reel, Cut Tape, MouseReel
Real Time Clock I2CAL TIME CLK/CLNDR 8LD ISL1208IU8Z-TK Renesas / Intersil 1: £2.71 3,502In Stock 3,000Expected 08/07/2027	Mfr. Part No. ISL1208IU8Z-TK Mouser Part No 968-ISL1208IU8Z-TK	Renesas / Intersil	Real Time Clock I2CAL TIME CLK/CLNDR 8LD	Datasheet	3,502In Stock 3,000Expected 08/07/2027	Cut Tape £2.71 £2.04 £1.88 £1.69 Reel £1.48 View £1.60 £1.55 £1.43 £1.41 MouseReel Available	Min.: 1 Mult.: 1 : 1,000	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		Reel, Cut Tape, MouseReel
Real Time Clock REAL TIME CLKRTC IN ISL1219IUZ Renesas / Intersil 1: £3.06 1,682In Stock	Mfr. Part No. ISL1219IUZ Mouser Part No 968-ISL1219IUZ	Renesas / Intersil	Real Time Clock REAL TIME CLKRTC IN	Datasheet	1,682In Stock	£3.06 £2.31 £2.12 £1.98 View £1.88 £1.80 £1.68 £1.64	Min.: 1 Mult.: 1	I2C	YY-MM-DD-dd	HH:MM:SS (24 hr)	MSOP-10	Backup Switching	2.7 V	5.5 V	- 40 C	+ 85 C	ISL1219	SMD/SMT		Tube
Real Time Clock 32.768 kHz +/-20 PPM I2C -40/+85C RV-4162-C7-32.768k-20PPM-TA-QA Micro Crystal 1: £2.46 90In Stock 1,000Expected 04/12/2026	Mfr. Part No. RV-4162-C7-32.768k-20PPM-TA-QA Mouser Part No 428-202471-MG01	Micro Crystal	Real Time Clock 32.768 kHz +/-20 PPM I2C -40/+85C	Datasheet	90In Stock 1,000Expected 04/12/2026	Cut Tape £2.46 £1.92 £1.79 £1.67 Reel £1.41 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