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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	Packaging
Real Time Clock I2C GP RTCC 1Kb EE 64B SRAM EUI-48 MCP79411T-I/SN Microchip Technology 1: £0.925 5,458In Stock	Mfr. Part No. MCP79411T-I/SN Mouser Part No 579-MCP79411TISN	Microchip Technology	Real Time Clock I2C GP RTCC 1Kb EE 64B SRAM EUI-48 Learn More about Microchip Technology microchip mcp794xx calendars	Datasheet	5,458In Stock	Cut Tape £0.925 Reel £0.78 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 SPI GP RTCC 2Kb EE 64B SRAM ID MCP79520T-I/MS Microchip Technology 1: £1.12 1,890In Stock 2,500Expected 10/11/2026	Mfr. Part No. MCP79520T-I/MS Mouser Part No 579-MCP79520T-I/MS	Microchip Technology	Real Time Clock SPI GP RTCC 2Kb EE 64B SRAM ID Learn More about Microchip Technology microchip mcp795xx	Datasheet	1,890In Stock 2,500Expected 10/11/2026	Cut Tape £1.12 Reel £0.943 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	Reel, Cut Tape, MouseReel
Real Time Clock Serial RTC A 595-BQ3 2000D A 595-BQ32000 A 595-BQ32000D BQ32000DR Texas Instruments 1: £1.75 1,935In Stock 5,000Expected 01/02/2027	Mfr. Part No. BQ32000DR Mouser Part No 595-BQ32000DR	Texas Instruments	Real Time Clock Serial RTC A 595-BQ3 2000D A 595-BQ32000 A 595-BQ32000D	Datasheet	1,935In Stock 5,000Expected 01/02/2027	Cut Tape £1.75 £1.28 £1.17 £1.05 Reel £0.89 View £0.986 £0.952 £0.925 £0.871 MouseReel Available	Min.: 1 Mult.: 1 : 2,500	I2C	YY-MM-DD-dd	HH:MM:SS:hh (12 hr, 24 hr)	SOIC-8	Backup Switching	3 V	3.6 V	- 40 C	+ 85 C	BQ32000	SMD/SMT	Reel, Cut Tape, MouseReel
Real Time Clock 2-wire Real Time Clock S-35390A-I8T1U ABLIC 1: £1.39 2,726In Stock	Mfr. Part No. S-35390A-I8T1U Mouser Part No 628-S-35390A-I8T1U	ABLIC	Real Time Clock 2-wire Real Time Clock Learn More about ABLIC seiko s 35390a clocks	Datasheet	2,726In Stock	Cut Tape £1.39 £1.02 £0.934 £0.826 View Reel £0.674 £0.78 £0.739 £0.736 £0.711 £0.674 MouseReel Available	Min.: 1 Mult.: 1 : 5,000	Serial 2-Wire, I2C	YY-MM-DD-dd	HH:MM:SS:hh (12 hr, 24 hr)	SNT-A-8	No Backup Switching	1.3 V	5.5 V	- 40 C	+ 85 C	S-35390	SMD/SMT	Reel, Cut Tape, MouseReel
Real Time Clock Real Time Clock S-35390A-T8T1U ABLIC 1: £1.39 2,585In Stock	Mfr. Part No. S-35390A-T8T1U Mouser Part No 628-S-35390A-T8T1U	ABLIC	Real Time Clock Real Time Clock Learn More about ABLIC seiko s 35390a clocks	Datasheet	2,585In Stock	Cut Tape £1.39 £1.02 £0.934 £0.826 View Reel £0.641 £0.78 £0.739 £0.736 £0.711 £0.641 MouseReel Available	Min.: 1 Mult.: 1 : 4,000	Serial 2-Wire, I2C	YY-MM-DD-dd	HH:MM:SS:hh (12 hr, 24 hr)	TSSOP-8	No Backup Switching	1.3 V	5.5 V	- 40 C	+ 85 C	S-35390	SMD/SMT	Reel, Cut Tape, MouseReel
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 RTC Module with I2C or SPI interface featuring backup battery switch-over function in HLSON16 package. PCF2131TFY NXP Semiconductors 1: £2.75 2,671In Stock 103,520On 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	2,671In Stock 103,520On Order On Order Ship Dates Mfr. No: PCF2131TFY Stock: 2,671 Can Dispatch Immediately On Order: 4,000 Expected 02/11/2026 23,520 Expected 09/11/2026 32,000 Expected 01/11/2027 44,000 TBD Factory Lead Time: 16 Weeks	Cut Tape £2.75 £2.07 £1.90 £1.71 View Reel £1.41 £1.62 £1.58 £1.53 £1.51 £1.41 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 TSSOP8 package. PCF85063ATT/AJ NXP Semiconductors 1: £0.713 3,376In Stock 27,500On Order	Mfr. Part No. PCF85063ATT/AJ Mouser Part No 771-PCF85063ATT/AJ	NXP Semiconductors	Real Time Clock RTC IC with 400 kHz I2C interface in TSSOP8 package. Learn More about NXP Semiconductors nxp pcf85063 clocks	Datasheet	3,376In Stock 27,500On Order On Order Ship Dates Mfr. No: PCF85063ATT/AJ Stock: 3,376 Can Dispatch Immediately On Order: 15,000 Expected 05/04/2027 12,500 Expected 04/10/2027 Factory Lead Time: 27 Weeks	Cut Tape £0.713 £0.485 £0.437 £0.406 View Reel £0.341 £0.378 £0.362 £0.356 £0.341 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	+ 85 C	PCF85063A	SMD/SMT	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: £1.09 2,916In Stock 40,000On Order	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	2,916In Stock 40,000On Order On Order Ship Dates Mfr. No: PCF85263ATT/AJ Stock: 2,916 Can Dispatch Immediately On Order: 20,000 Expected 12/04/2027 20,000 Expected 19/04/2027 Factory Lead Time: 27 Weeks	Cut Tape £1.09 £0.796 £0.718 £0.636 View Reel £0.526 £0.598 £0.574 £0.562 £0.526 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 5,392In 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	5,392In 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 Hi Prec I2C-Bus Real Time Clock Mod R2025S-E2-FE Nisshinbo 1: £3.36 2,437In 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	2,437In 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 2,120In Stock 2,000Expected 06/11/2026	Mfr. Part No. R2051S01-E2-F Mouser Part No 848-R2051S01E2F	Nisshinbo	Real Time Clock 2-Wire Real Time Clock IC	Datasheet	2,120In Stock 2,000Expected 06/11/2026	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 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 View £17.87 £17.86	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 £3.68 £3.43 View £3.28 £3.24 £3.23 £3.19 Quote	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 Quote 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 6,056In 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	6,056In Stock	Cut Tape £2.19 £1.63 £1.49 £1.34 Reel £1.14 View £1.27 £1.23 £1.20 £1.08 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 7,346In 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	7,346In 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 £2.30 View £2.27 £2.13 £2.09 £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