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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.	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 REAL TIME CLKRTC IN ISL1219IUZ-T Renesas / Intersil 1: $4.06 1,830In Stock	Mfr. Part No. ISL1219IUZ-T Mouser Part No 968-ISL1219IUZ-T	Renesas / Intersil	Real Time Clock REAL TIME CLKRTC IN	Datasheet	1,830In Stock	Cut Tape $4.06 $3.06 $2.81 $2.54 View Reel $2.24 $2.41 $2.39 $2.25 $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 Low-Pwr serial RTC W/ battry switchover M41T01M6F STMicroelectronics 1: $3.91 2,330In Stock	Mfr. Part No. M41T01M6F Mouser Part No 511-M41T01M6F	STMicroelectronics	Real Time Clock Low-Pwr serial RTC W/ battry switchover Learn More about STMicroelectronics stm standard products	Datasheet	2,330In Stock	Cut Tape $3.91 $2.95 $2.71 $2.45 Reel $1.91 View $2.32 $2.29 $2.21 $1.90 MouseReel Available	Min.: 1 Mult.: 1 : 2,500	Serial 2-Wire, I2C	YY-MM-DD-dd	HH:MM:SS (24 hr)	SOIC-8	Backup Switching	2 V	5.5 V	- 40 C	+ 85 C	M41T01	SMD/SMT	Reel, Cut Tape, MouseReel
Real Time Clock Serial SPI bus RTC M41T93ZQA6F STMicroelectronics 1: $7.75 1,019In Stock	Mfr. Part No. M41T93ZQA6F Mouser Part No 511-M41T93ZQA6F	STMicroelectronics	Real Time Clock Serial SPI bus RTC	Datasheet	1,019In Stock	Cut Tape $7.75 $6.13 $5.54 $5.05 View Reel $4.40 $4.77 $4.76 $4.40 Quote 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	M41T93	SMD/SMT	Reel, Cut Tape, MouseReel
Real Time Clock I2C GP RTCC 1Kb EE 64B SRAM EUI-48 MCP79411-I/SN Microchip Technology 1: $1.13 11,841In Stock	Mfr. Part No. MCP79411-I/SN Mouser Part No 579-MCP79411ISN	Microchip Technology	Real Time Clock I2C GP RTCC 1Kb EE 64B SRAM EUI-48 Learn More about Microchip Technology microchip mcp794xx calendars	Datasheet	11,841In Stock	$1.13 $1.05 $1.03	Min.: 1 Mult.: 1	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	Tube
Real Time Clock 2-Wire Real Time Clock IC R2023T-E2-F Nisshinbo 1: $1.49 5,003In Stock	Mfr. Part No. R2023T-E2-F Mouser Part No 848-R2023TE2F	Nisshinbo	Real Time Clock 2-Wire Real Time Clock IC	Datasheet	5,003In Stock	Cut Tape $1.49 $1.09 $0.987 $0.876 Reel $0.682 View $0.822 $0.79 $0.711 $0.68 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	1.7 V	5.5 V	- 40 C	+ 85 C	R2023T	SMD/SMT	Reel, Cut Tape, MouseReel
Real Time Clock 3-wire Real Time Clock S-35190A-I8T1U ABLIC 1: $1.12 2,889In Stock	Mfr. Part No. S-35190A-I8T1U Mouser Part No 628-S-35190A-I8T1U	ABLIC	Real Time Clock 3-wire Real Time Clock	Datasheet	2,889In Stock	Cut Tape $1.12 $0.99 $0.96 $0.925 View Reel $0.802 $0.909 $0.90 $0.898 $0.803 $0.802 MouseReel Available	Min.: 1 Mult.: 1 : 5,000	Serial 3-Wire	YY-MM-DD-dd	HH:MM:SS (24 hr)	SNT-A-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 W/ ALARM DS1337 COMP ISL12057IBZ Renesas / Intersil 1: $2.82 1,702In Stock	Mfr. Part No. ISL12057IBZ Mouser Part No 968-ISL12057IBZ	Renesas / Intersil	Real Time Clock REAL TIME CLK W/ ALARM DS1337 COMP	Datasheet	1,702In Stock	$2.82 $2.10 $1.93 $1.73 View $1.63 $1.56 $1.51 $1.46 $1.43	Min.: 1 Mult.: 1	I2C	YY-MM-DD-dd	HH:MM:SS (24 hr)	SOIC-8	No Backup Switching	1.8 V	3.6 V	- 40 C	+ 85 C	ISL12057	SMD/SMT	Tube
Real Time Clock I2CAL TIME CLK/CLNDR W/EVENT DETCT 10LD ISL1209IU10Z-TK Renesas / Intersil 1: $4.01 1,963In 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	1,963In Stock	Cut Tape $4.01 $3.02 $2.78 $2.51 View Reel $2.10 $2.38 $2.36 $2.10 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 1Kb EE 64B SRAM WD TED EUI-64 MCP795W12-I/SL Microchip Technology 1: $1.85 717In Stock	Mfr. Part No. MCP795W12-I/SL Mouser Part No 579-MCP795W12-I/SL	Microchip Technology	Real Time Clock 1Kb EE 64B SRAM WD TED EUI-64 Learn More about Microchip Technology microchip mcp795xx	Datasheet	717In Stock	$1.85 $1.71 $1.66	Min.: 1 Mult.: 1	SPI	YY-MM-DD-dd	HH:MM:SS:hh (12 hr, 24 hr)	SOIC-14	Backup Switching	1.8 V	5.5 V	- 40 C	+ 85 C		SMD/SMT	Tube
Real Time Clock 4-wire Serial Interface RV5C348B-E2-F Nisshinbo 1: $1.64 1,445In Stock	Mfr. Part No. RV5C348B-E2-F Mouser Part No 848-RV5C348B-E2-F	Nisshinbo	Real Time Clock 4-wire Serial Interface	Datasheet	1,445In Stock	Cut Tape $1.64 $1.20 $1.09 $0.961 Reel $0.797 View $0.903 $0.868 $0.798 $0.793 MouseReel Available	Min.: 1 Mult.: 1 : 2,000	Serial 4-Wire	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 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 $0.903 $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 2-Wire Real Time Clock IC R2051L02-E2 Nisshinbo 1: $1.61 3,620In Stock	Mfr. Part No. R2051L02-E2 Mouser Part No 848-R2051L02-E2	Nisshinbo	Real Time Clock 2-Wire Real Time Clock IC	Datasheet	3,620In Stock	Cut Tape $1.61 $1.18 $1.07 $0.944 Reel $0.743 View $0.887 $0.852 $0.773 $0.737 MouseReel Available	Min.: 1 Mult.: 1 : 3,000	Serial 2-Wire, I2C	YY-MM-DD-dd	HH:MM:SS:hh (12 hr, 24 hr)	QFN023023-16	Backup Switching	750 mV	5.5 V	- 40 C	+ 85 C	R2051L	SMD/SMT	Reel, Cut Tape, MouseReel
Real Time Clock I2C RTCC 64B SRAM No VBAT MCP7940M-I/ST Microchip Technology 1: $0.71 1,292In 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	1,292In Stock	$0.71 $0.66 $0.629	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: $4.76 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	$4.76 $3.59 $3.30 $2.97 View $2.82 $2.80 $2.37 $2.36 $2.35	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 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 $0.694 $0.822 $0.79 $0.70 $0.694 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: $1.63 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 $1.63 $1.20 $1.09 $0.968 Reel $0.742 View $0.918 $0.875 $0.743 $0.738 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 RTCs with Constant-Voltage Trickle Charg DS12CR887-5+ Analog Devices / Maxim Integrated 1: $13.75 388In 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	388In Stock	$13.75 $13.45 $13.16 $12.89 View $12.69 $12.50 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	- 40 C	+ 85 C	DS12CR887	Through Hole	Tube
Real Time Clock Phantom Time Chip DS1315EN-33+ Analog Devices / Maxim Integrated 1: $38.58 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	$38.58 $31.24 $29.40 $28.18 View $26.42 Quote	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: $34.08 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	$34.08 $27.59 $25.54 $24.28 View $23.33 Quote	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: $4.76 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	$4.76 $4.66 $4.56 $4.47 View $4.40 $4.33 $4.27 $4.20	Min.: 1 Mult.: 1	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 DS1394U-33+ Analog Devices / Maxim Integrated 1: $3.70 2,966In 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	2,966In Stock	$3.70 $3.62 $3.54 $3.47 View $3.41 $3.36 $3.31 $3.26	Min.: 1 Mult.: 1	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: $41.33 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	$41.33 $33.29 $29.31 $29.06 View $28.16 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: $68.41 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	$68.41 $61.43 $55.45 $55.20 View Quote	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: $70.07 166In 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	166In Stock	$70.07 $61.56 $56.83 $55.44	Min.: 1 Mult.: 1	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: $39.82 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	$39.82 $33.10 $30.61 $29.54 View 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