.hide-partial { max-height: none; } .show-more { display: none; }

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.
More...

Please view our large selection of real time clocks below.

.catnav-wrapper { height: auto; overflow: visible; } .catalog-nav-tabs ul { white-space: normal; }

Results: 838

Applied Filters:

Manufacturer

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

Qualification

Time Keeping Current

Packaging

Reset All

Search within results

In Stock

Normally Stocked

Active

New Products

RoHS Compliant

.search-refine-wrapper { display: inline-block; min-width: 100%; } .scroll-body { overflow-x: visible; } .search-table-wrapper { overflow: visible; } .hide-partial { max-height: none; } .show-more { display: none; }

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 I2CAL TIME CLK/CLNDR W/EVENT DETCT 10LD ISL1209IU10Z-TK Renesas / Intersil 1: $4.01 2,063In Stock	Mfr. Part No. ISL1209IU10Z-TK Mouser Part No 968-ISL1209IU10Z-TK	Renesas / Intersil	Real Time Clock I2CAL TIME CLK/CLNDR W/EVENT DETCT 10LD	Datasheet	2,063In Stock	Cut Tape $4.01 $3.02 $2.76 $2.51 View Reel $2.11 $2.38 $2.35 $2.11 MouseReel Available	Min.: 1 Mult.: 1 : 1,000	I2C	YY-MM-DD-dd	HH:MM:SS (24 hr)	MSOP-10	Backup Switching	2.7 V	5.5 V	- 40 C	+ 85 C	ISL1209	SMD/SMT	Reel, Cut Tape, MouseReel
Real Time Clock I C RTC with Trickle Charger DS1340Z-18+ Analog Devices / Maxim Integrated 1: $8.34 5,864In Stock	Mfr. Part No. DS1340Z-18+ Mouser Part No 700-DS1340Z-18	Analog Devices / Maxim Integrated	Real Time Clock I C RTC with Trickle Charger Learn More about Analog Devices / Maxim Integrated maximds1343	Datasheet	5,864In Stock	$8.34 $6.43 $5.95 $4.81 View $4.61 $4.58 $4.48	Min.: 1 Mult.: 1 Max.: 4,691	I2C	YY-MM-DD-dd	HH:MM:SS (24 hr)	SO-8	Backup Switching	1.71 V	1.89 V	- 40 C	+ 85 C	DS1340Z	SMD/SMT	Tube
Real Time Clock LW PWR RTC W/RESEAL 8LD ISL12008IB8Z Renesas / Intersil 1: $3.23 4,620In Stock	Mfr. Part No. ISL12008IB8Z Mouser Part No 968-ISL12008IB8Z	Renesas / Intersil	Real Time Clock LW PWR RTC W/RESEAL 8LD	Datasheet	4,620In Stock	$3.23 $2.41 $1.90 $1.79 View $1.72 $1.70 $1.60 $1.59	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 CLKRTC IN ISL1219IUZ-T Renesas / Intersil 1: $4.06 2,200In Stock	Mfr. Part No. ISL1219IUZ-T Mouser Part No 968-ISL1219IUZ-T	Renesas / Intersil	Real Time Clock REAL TIME CLKRTC IN	Datasheet	2,200In Stock	Cut Tape $4.06 $3.06 $2.81 $2.54 View Reel $2.24 $2.41 $2.40 $2.26 $2.24 MouseReel Available	Min.: 1 Mult.: 1 : 2,500	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	Reel, Cut Tape, MouseReel
Real Time Clock Serial I2C bus RTC M41T83ZMY6F STMicroelectronics 1: $7.40 765In Stock	Mfr. Part No. M41T83ZMY6F Mouser Part No 511-M41T83ZMY6F	STMicroelectronics	Real Time Clock Serial I2C bus RTC	Datasheet	765In Stock	Cut Tape $7.40 $5.72 $5.30 $4.83 Reel $4.16 View $4.47 $4.05 MouseReel Available	Min.: 1 Mult.: 1 : 1,000	Serial	YY-MM-DD-dd	HH:MM:SS:hh (12 hr, 24 hr)		Backup Switching	2.38 V	5.5 V	- 40 C	+ 85 C	M41T83	SMD/SMT	Reel, Cut Tape, MouseReel
Real Time Clock Real Time Clock S-35190A-J8T1U ABLIC 1: $1.38 4,632In Stock	Mfr. Part No. S-35190A-J8T1U Mouser Part No 628-35190A-G	ABLIC	Real Time Clock Real Time Clock	Datasheet	4,632In Stock	Cut Tape $1.38 $1.13 $1.07 $0.991 View Reel $0.832 $0.956 $0.936 $0.927 $0.832 $0.832 MouseReel Available	Min.: 1 Mult.: 1 : 4,000	Serial 3-Wire	YY-MM-DD-dd	HH:MM:SS (24 hr)	SOP-8	Backup Switching	1.3 V	5.5 V	- 40 C	+ 85 C	S-35190	SMD/SMT	Reel, Cut Tape, MouseReel
Real Time Clock REAL TIME CLK & TEMP COMPENSATED CRYSTAL ISL12022MIBZ Renesas / Intersil 1: $7.47 358In Stock	Mfr. Part No. ISL12022MIBZ Mouser Part No 968-ISL12022MIBZ	Renesas / Intersil	Real Time Clock REAL TIME CLK & TEMP COMPENSATED CRYSTAL	Datasheet	358In Stock	$7.47 $5.76 $4.76 $4.47 View $4.33 $4.24 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 32.768kHz SPI Time Acc. 25ppm RV-3149-C3 32.768kHz OPTION B TA QC Micro Crystal 1: $4.65 717In Stock	Mfr. Part No. RV-3149-C3 32.768kHz OPTION B TA QC Mouser Part No 428-203605-MG01	Micro Crystal	Real Time Clock 32.768kHz SPI Time Acc. 25ppm Learn More about Micro Crystal real time clock modules	Datasheet	717In Stock	Cut Tape $4.65 $3.49 $3.21 $2.88 Reel $2.52 View $2.72 $2.66 $2.45 $2.40 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	+ 85 C	RV-3149	SMD/SMT	Reel, Cut Tape, MouseReel
Real Time Clock I2C RTCC 64B SRAM No VBAT MCP7940M-I/ST Microchip Technology 1: $0.711 1,302In Stock	Mfr. Part No. MCP7940M-I/ST Mouser Part No 579-MCP7940M-I/ST	Microchip Technology	Real Time Clock I2C RTCC 64B SRAM No VBAT Learn More about Microchip Technology microchip real time clocks	Datasheet	1,302In Stock	$0.711 $0.661 $0.636	Min.: 1 Mult.: 1	I2C	YY-MM-DD-dd	HH:MM:SS:hh (12 hr, 24 hr)	TSSOP-8	No Backup Switching	1.8 V	5.5 V	- 40 C	+ 85 C		SMD/SMT	Tube
Real Time Clock 32.768 kHz OPTION A TEMP COMP SPI RV-3049-C3-32.768KHZ-OPTION-A-TA-QC Micro Crystal 1: $5.98 899In Stock NRND	Mfr. Part No. RV-3049-C3-32.768KHZ-OPTION-A-TA-QC Mouser Part No 428-202184-MG01 NRND	Micro Crystal	Real Time Clock 32.768 kHz OPTION A TEMP COMP SPI	Datasheet	899In Stock	$5.98 $4.51 $4.14 $3.73 View $3.55 $3.51 $2.98 $2.97 Quote	Min.: 1 Mult.: 1	Serial 2-Wire, I2C	YY-MM-DD-dd	HH:MM:SS (24 hr)		Backup Switching	1.3 V	5.5 V	- 40 C	+ 85 C	RV-3049-C3	SMD/SMT
Real Time Clock 4-Wire Real Time Clock IC RV5C348A-E2-F Nisshinbo 1: $1.64 1,720In Stock	Mfr. Part No. RV5C348A-E2-F Mouser Part No 848-RV5C348AE2F	Nisshinbo	Real Time Clock 4-Wire Real Time Clock IC	Datasheet	1,720In Stock	Cut Tape $1.64 $1.20 $1.09 $0.961 Reel $0.797 View $0.904 $0.868 $0.798 $0.764 MouseReel Available	Min.: 1 Mult.: 1 : 2,000	Serial 4-Wire, SPI	YY-MM-DD-dd	HH:MM:SS:hh (12 hr, 24 hr)	SSOP-10	Backup Switching	2 V	5.5 V	- 40 C	+ 85 C	RV5C348	SMD/SMT	Reel, Cut Tape, MouseReel
Real Time Clock 3-Wire Real Time Clock IC R2033T-E2-F Nisshinbo 1: $1.49 1,989In Stock	Mfr. Part No. R2033T-E2-F Mouser Part No 848-R2033TE2F	Nisshinbo	Real Time Clock 3-Wire Real Time Clock IC	Datasheet	1,989In Stock	Cut Tape $1.49 $1.09 $0.987 $0.876 View Reel $0.699 $0.822 $0.79 $0.70 $0.699 MouseReel Available	Min.: 1 Mult.: 1 : 2,000	Serial 3-Wire	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	R2033T	SMD/SMT	Reel, Cut Tape, MouseReel
Real Time Clock 2-Wire Real Time Clock IC R2223T-E2-F Nisshinbo 1: $1.64 1,680In Stock	Mfr. Part No. R2223T-E2-F Mouser Part No 848-R2223TE2F	Nisshinbo	Real Time Clock 2-Wire Real Time Clock IC		1,680In Stock	Cut Tape $1.64 $1.21 $1.09 $0.968 Reel $0.754 View $0.918 $0.876 $0.775 $0.739 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	R2223T	SMD/SMT	Reel, Cut Tape, MouseReel
Real Time Clock 3V/5V Real-Time Clock DS1687-5IND+ Analog Devices / Maxim Integrated 1: $33.25 86In Stock	Mfr. Part No. DS1687-5IND+ Mouser Part No 700-DS1687-5IND	Analog Devices / Maxim Integrated	Real Time Clock 3V/5V Real-Time Clock	Datasheet	86In Stock	$33.25 $26.91 $25.33 $24.28 $22.76	Min.: 1 Mult.: 1	Multiplexed	YY-MM-DD-dd	HH:MM:SS:hh (12 hr, 24 hr)	EDIP-24	Integrated Battery	4.5 V	5.5 V	- 40 C	+ 85 C	DS1687	Through Hole	Tube
Real Time Clock Y2K-Compliant, Nonvolatile Timekeeping R DS1746WP-120+ Analog Devices / Maxim Integrated 1: $65.66 75In Stock	Mfr. Part No. DS1746WP-120+ Mouser Part No 700-DS1746WP-120	Analog Devices / Maxim Integrated	Real Time Clock Y2K-Compliant, Nonvolatile Timekeeping R	Datasheet	75In Stock	$65.66 $54.23 $51.38 $50.74 View Quote	Min.: 1 Mult.: 1	Parallel	YY-MM-DD-dd	HH:MM:SS (24 hr)	PowerCap Module-34	Backup Switching	2.97 V	3.63 V	0 C	+ 70 C	DS1746WP	SMD/SMT	Tray
Real Time Clock RTCs with Constant-Voltage Trickle Charg DS12CR887-5+ Analog Devices / Maxim Integrated 1: $22.40 393In Stock	Mfr. Part No. DS12CR887-5+ Mouser Part No 700-DS12CR887-5+	Analog Devices / Maxim Integrated	Real Time Clock RTCs with Constant-Voltage Trickle Charg	Datasheet	393In Stock	$22.40 $17.90 $14.72 $14.11 $13.96	Min.: 1 Mult.: 1 Max.: 314	Multiplexed	YY-MM-DD-dd	HH:MM:SS:hh (12 hr, 24 hr)	EDIP-24	Integrated Battery	4.5 V	5.5 V	- 40 C	+ 85 C	DS12CR887	Through Hole	Tube
Real Time Clock Phantom Time Chip DS1315EN-33+ Analog Devices / Maxim Integrated 1: $38.59 80In Stock	Mfr. Part No. DS1315EN-33+ Mouser Part No 700-DS1315EN-33	Analog Devices / Maxim Integrated	Real Time Clock Phantom Time Chip	Datasheet	80In Stock	$38.59 $31.25 $29.40 $28.18 $26.41	Min.: 1 Mult.: 1	Phantom Clock	YY-MM-DD-dd	HH:MM:SS:hh (12 hr, 24 hr)	TSSOP-20	Backup Switching	3 V	3.6 V	- 40 C	+ 85 C	DS1315EN	SMD/SMT	Tube
Real Time Clock Phantom Time Chip DS1315S-33+ Analog Devices / Maxim Integrated 1: $34.09 65In Stock	Mfr. Part No. DS1315S-33+ Mouser Part No 700-DS1315S-33	Analog Devices / Maxim Integrated	Real Time Clock Phantom Time Chip	Datasheet	65In Stock	$34.09 $27.60 $25.97 $24.90 $23.33	Min.: 1 Mult.: 1	Phantom Clock	YY-MM-DD-dd	HH:MM:SS:hh (12 hr, 24 hr)	SO-16	Backup Switching	3 V	3.6 V	0 C	+ 70 C	DS1315S	SMD/SMT	Tube
Real Time Clock I C RTC/Supervisor with Trickle Charger DS1388Z-3+ Analog Devices / Maxim Integrated 1: $8.52 325In Stock	Mfr. Part No. DS1388Z-3+ Mouser Part No 700-DS1388Z-3	Analog Devices / Maxim Integrated	Real Time Clock I C RTC/Supervisor with Trickle Charger	Datasheet	325In Stock	$8.52 $6.61 $6.12 $5.59	Min.: 1 Mult.: 1 Max.: 260	I2C	YY-MM-DD-dd	HH:MM:SS:hh (12 hr, 24 hr)	SOIC-8	Backup Switching	2.7 V	3.3 V	- 40 C	+ 85 C	DS1388Z	SMD/SMT	Tube
Real Time Clock Low-Voltage SPI/3-Wire RTCs with Trickle DS1390U-3+ Analog Devices / Maxim Integrated 1: $6.64 429In Stock	Mfr. Part No. DS1390U-3+ Mouser Part No 700-DS1390U-3	Analog Devices / Maxim Integrated	Real Time Clock Low-Voltage SPI/3-Wire RTCs with Trickle	Datasheet	429In Stock	$6.64 $5.09 $4.69 $4.27 $4.06	Min.: 1 Mult.: 1 Max.: 343	SPI	YY-MM-DD-dd	HH:MM:SS:hh (12 hr, 24 hr)	uSOP-10	Backup Switching	2.7 V	3.3 V	- 40 C	+ 85 C	DS1390U	SMD/SMT	Tube
Real Time Clock Low-Voltage SPI/3-Wire RTCs with Trickle DS1394U-33+ Analog Devices / Maxim Integrated 1: $6.33 3,125In Stock	Mfr. Part No. DS1394U-33+ Mouser Part No 700-DS1394U-33	Analog Devices / Maxim Integrated	Real Time Clock Low-Voltage SPI/3-Wire RTCs with Trickle	Datasheet	3,125In Stock	$6.33 $4.86 $4.47 $4.08 View $3.88 $3.76 $3.72 $3.68	Min.: 1 Mult.: 1 Max.: 2,500	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	Tube
Real Time Clock Y2K-Compliant Watchdog Real-Time Clocks DS1511Y+ Analog Devices / Maxim Integrated 1: $39.59 96In Stock	Mfr. Part No. DS1511Y+ Mouser Part No 700-DS1511Y	Analog Devices / Maxim Integrated	Real Time Clock Y2K-Compliant Watchdog Real-Time Clocks	Datasheet	96In Stock	$39.59 $32.05 $29.90 $28.11 View $28.04 Quote	Min.: 1 Mult.: 1	Parallel	YY-MM-DD-dd	HH:MM:SS (24 hr)	EDIP-28	Backup Switching	4.5 V	5.5 V	0 C	+ 70 C	DS1511Y	Through Hole	Tube
Real Time Clock 1M, Nonvolatile, Y2K-Compliant Timekeepi DS1556W-120+ Analog Devices / Maxim Integrated 1: $70.36 35In Stock	Mfr. Part No. DS1556W-120+ Mouser Part No 700-DS1556W-120	Analog Devices / Maxim Integrated	Real Time Clock 1M, Nonvolatile, Y2K-Compliant Timekeepi	Datasheet	35In Stock	$70.36 $60.16 $55.08	Min.: 1 Mult.: 1	Parallel	YY-MM-DD-dd	HH:MM:SS (24 hr)		Integrated Battery	2.97 V	3.63 V	0 C	+ 70 C	DS1556W	Through Hole	Tube
Real Time Clock Y2K-Compliant, Nonvolatile Timekeeping R DS1744-70IND+ Analog Devices / Maxim Integrated 1: $74.57 170In Stock	Mfr. Part No. DS1744-70IND+ Mouser Part No 700-DS1744-70IND	Analog Devices / Maxim Integrated	Real Time Clock Y2K-Compliant, Nonvolatile Timekeeping R	Datasheet	170In Stock	$74.57 $61.59 $58.34 $57.62	Min.: 1 Mult.: 1 Max.: 136	Parallel	YY-MM-DD-dd	HH:MM:SS (24 hr)	EDIP-28	Integrated Battery	4.5 V	5.5 V	- 40 C	+ 85 C	DS1744	Through Hole	Tube
Real Time Clock 3V/5V Real-Time Clocks DS17887-5+ Analog Devices / Maxim Integrated 1: $43.50 72In Stock	Mfr. Part No. DS17887-5+ Mouser Part No 700-DS17887-5	Analog Devices / Maxim Integrated	Real Time Clock 3V/5V Real-Time Clocks	Datasheet	72In Stock	$43.50 $35.54 $33.54 $32.61 View $30.33 Quote	Min.: 1 Mult.: 1	Multiplexed	YY-MM-DD-dd	HH:MM:SS:hh (12 hr, 24 hr)	EDIP-24	Integrated Battery	4.5 V	5.5 V	0 C	+ 70 C	DS17887	Through Hole	Tube