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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 16K (2Kx8) 70ns M48T12-70PC1 STMicroelectronics 1: $53.64 844In Stock	Mfr. Part # M48T12-70PC1 Mouser Part # 511-M48T1270PC1	STMicroelectronics	Real Time Clock 16K (2Kx8) 70ns	Datasheet	844In Stock	$53.64 $39.46 $37.87 $36.39 View $35.07 Quote	Min.: 1 Mult.: 1	Parallel	YY-MM-DD-dd	HH:MM:SS (24 hr)	PCDIP-24	Integrated Battery	4.5 V	5.5 V	0 C	+ 70 C	M48T12	Through Hole	Tube
Real Time Clock I2C GP RTCC 1Kb EE 64B SRAM EUI-64 MCP79412-I/MS Microchip Technology 1: $1.53 3,702In Stock	Mfr. Part # MCP79412-I/MS Mouser Part # 579-MCP79412IMS	Microchip Technology	Real Time Clock I2C GP RTCC 1Kb EE 64B SRAM EUI-64 Learn More about Microchip Technology microchip mcp794xx calendars	Datasheet	3,702In Stock	$1.53 $1.52 $1.40 $1.33	Min.: 1 Mult.: 1	I2C	YY-MM-DD-dd	HH:MM:SS:hh (12 hr, 24 hr)	MSOP-8	Backup Switching	1.8 V	5.5 V	- 40 C	+ 85 C		SMD/SMT	Tube
Real Time Clock I2C GP RTCC 1Kb EE 64B SRAM EUI-64 MCP79412-I/ST Microchip Technology 1: $1.53 4,615In Stock	Mfr. Part # MCP79412-I/ST Mouser Part # 579-MCP79412IST	Microchip Technology	Real Time Clock I2C GP RTCC 1Kb EE 64B SRAM EUI-64 Learn More about Microchip Technology microchip mcp794xx calendars	Datasheet	4,615In Stock	$1.53 $1.40 $1.34	Min.: 1 Mult.: 1	I2C	YY-MM-DD-dd	HH:MM:SS:hh (12 hr, 24 hr)	TSSOP-8	Backup Switching	1.8 V	5.5 V	- 40 C	+ 85 C		SMD/SMT	Tube
Real Time Clock 2Kb EE 64B SRAM WD TED EUI-64 MCP795W22-I/ST Microchip Technology 1: $2.57 4,770In Stock	Mfr. Part # MCP795W22-I/ST Mouser Part # 579-MCP795W22-I/ST	Microchip Technology	Real Time Clock 2Kb EE 64B SRAM WD TED EUI-64 Learn More about Microchip Technology microchip mcp795xx	Datasheet	4,770In Stock	$2.57 $2.39	Min.: 1 Mult.: 1	SPI	YY-MM-DD-dd	HH:MM:SS:hh (12 hr, 24 hr)	TSSOP-14	Backup Switching	1.8 V	5.5 V	- 40 C	+ 85 C		SMD/SMT	Tube
Real Time Clock I2C GP RTCC 64B SRAM ID MCP79400-I/MS Microchip Technology 1: $1.30 5,399In Stock	Mfr. Part # MCP79400-I/MS Mouser Part # 579-MCP79400IMS	Microchip Technology	Real Time Clock I2C GP RTCC 64B SRAM ID Learn More about Microchip Technology microchip mcp7940n calendar	Datasheet	5,399In Stock	$1.30 $1.20 $1.13	Min.: 1 Mult.: 1	Serial 2-Wire, I2C	YY-MM-DD-dd	HH:MM:SS:hh (12 hr, 24 hr)	MSOP-8	Backup Switching	1.8 V	5.5 V	- 40 C	+ 85 C		SMD/SMT	Tube
Real Time Clock I C RTC with 56-Byte NV RAM DS1338Z-33+ Analog Devices / Maxim Integrated 1: $8.63 23,420In Stock	Mfr. Part # DS1338Z-33+ Mouser Part # 700-DS1338Z-33	Analog Devices / Maxim Integrated	Real Time Clock I C RTC with 56-Byte NV RAM	Datasheet	23,420In Stock	$8.63 $6.62 $6.11 $5.55 View $5.28 $5.12 $5.07 $5.01	Min.: 1 Mult.: 1	I2C	YY-MM-DD-dd	HH:MM:SS:hh (12 hr, 24 hr)	SOIC-8	Backup Switching	3 V	5.5 V	- 40 C	+ 85 C	DS1338Z	SMD/SMT	Tube
Real Time Clock I C RTC with Trickle Charger DS1340Z-18+ Analog Devices / Maxim Integrated 1: $10.76 5,864In Stock	Mfr. Part # DS1340Z-18+ Mouser Part # 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	$10.76 $8.31 $7.48 $6.84 View $6.49 $6.38 $6.27 $6.02	Min.: 1 Mult.: 1	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 I C RTC with Trickle Charger DS1340C-3# Analog Devices / Maxim Integrated 1: $8.97 13,268In Stock	Mfr. Part # DS1340C-3# Mouser Part # 700-DS1340C-3#-	Analog Devices / Maxim Integrated	Real Time Clock I C RTC with Trickle Charger Learn More about Analog Devices / Maxim Integrated maximds1343	Datasheet	13,268In Stock	$8.97 $8.78 $8.58 $8.41 View $8.28 $8.15 $8.03 Quote	Min.: 1 Mult.: 1	Serial 2-Wire, I2C	YY-MM-DD-dd	HH:MM:SS (24 hr)	SO-16	Backup Switching	2.7 V	3.3 V	- 40 C	+ 85 C	DS1340C	SMD/SMT	Tube
Real Time Clock Extremely Accurate SPI Bus RTC with Inte DS3234SN# Analog Devices / Maxim Integrated 1: $22.98 18,346In Stock	Mfr. Part # DS3234SN# Mouser Part # 700-DS3234SN#	Analog Devices / Maxim Integrated	Real Time Clock Extremely Accurate SPI Bus RTC with Inte	Datasheet	18,346In Stock	$22.98 $18.21 $16.86 $15.70 View $14.98 $14.72 Quote	Min.: 1 Mult.: 1	SPI	YY-MM-DD-dd	HH:MM:SS:hh (12 hr, 24 hr)	SO-20	Backup Switching	2 V	5.5 V	- 40 C	+ 85 C	DS3234SN	SMD/SMT	Tube
Real Time Clock REAL TIME CLK & TEMP COMPENSATED CRYSTAL ISL12022MIBZ Renesas / Intersil 1: $9.78 333In Stock	Mfr. Part # ISL12022MIBZ Mouser Part # 968-ISL12022MIBZ	Renesas / Intersil	Real Time Clock REAL TIME CLK & TEMP COMPENSATED CRYSTAL	Datasheet	333In Stock	$9.78 $7.54 $6.18 $5.81 View $5.69 $5.66 $5.51 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 I2C GP RTCC 1Kb EE 64B SRAM EUI-48 MCP79411-I/SN Microchip Technology 1: $1.44 11,846In Stock	Mfr. Part # MCP79411-I/SN Mouser Part # 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	11,846In Stock	$1.44 $1.37 $1.30	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 64K (8Kx8) 150ns M48T18-150PC1 STMicroelectronics 1: $65.61 395In Stock	Mfr. Part # M48T18-150PC1 Mouser Part # 511-M48T1815PC1	STMicroelectronics	Real Time Clock 64K (8Kx8) 150ns	Datasheet	395In Stock	$65.61 $49.56 $47.39 $46.51 View $46.32 Quote	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 REAL TIME CLK W/ ALARM DS1337 COMP ISL12057IBZ Renesas / Intersil 1: $3.67 1,702In Stock	Mfr. Part # ISL12057IBZ Mouser Part # 968-ISL12057IBZ	Renesas / Intersil	Real Time Clock REAL TIME CLK W/ ALARM DS1337 COMP	Datasheet	1,702In Stock	$3.67 $2.73 $2.51 $2.25 View $2.12 $2.03 $1.96 $1.90 $1.86	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 1Kb EE 64B SRAM WD TED EUI-64 MCP795W12-I/SL Microchip Technology 1: $2.41 717In Stock	Mfr. Part # MCP795W12-I/SL Mouser Part # 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	$2.41 $2.22 $2.11 $2.09	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 Serial RTC A 595-BQ3 2000DR A 595-BQ3200 A 595-BQ32000DR BQ32000D Texas Instruments 1: $2.98 673In Stock	Mfr. Part # BQ32000D Mouser Part # 595-BQ32000D	Texas Instruments	Real Time Clock Serial RTC A 595-BQ3 2000DR A 595-BQ3200 A 595-BQ32000DR	Datasheet	673In Stock	$2.98 $2.50 $2.26 $1.94 View $1.89 $1.87 $1.83 $1.81	Min.: 1 Mult.: 1	Serial	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	Tube
Real Time Clock I2C RTCC 64B SRAM No VBAT MCP7940M-I/ST Microchip Technology 1: $0.923 1,292In Stock	Mfr. Part # MCP7940M-I/ST Mouser Part # 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	$0.923 $0.90 $0.858 $0.806 $0.805	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 I C Serial Real-Time Clock DS1337+ Analog Devices / Maxim Integrated 1: $7.58 2,513In Stock	Mfr. Part # DS1337+ Mouser Part # 700-DS1337	Analog Devices / Maxim Integrated	Real Time Clock I C Serial Real-Time Clock Learn More about Analog Devices / Maxim Integrated maxim ds1337 rtc	Datasheet	2,513In Stock	$7.58 $5.77 $5.30 $4.37 View $4.19 $4.12 $4.02	Min.: 1 Mult.: 1	I2C	YY-MM-DD-dd	HH:MM:SS:hh (12 hr, 24 hr)	DIP-8	No Backup Switching	1.8 V	5.5 V	- 40 C	+ 85 C	DS1337	Through Hole	Tube
Real Time Clock 3V/5V Real-Time Clock DS1687-5IND+ Analog Devices / Maxim Integrated 1: $43.21 86In Stock	Mfr. Part # DS1687-5IND+ Mouser Part # 700-DS1687-5IND	Analog Devices / Maxim Integrated	Real Time Clock 3V/5V Real-Time Clock	Datasheet	86In Stock	$43.21 $34.98 $32.92 $31.56 $29.58	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 Serial Alarm Real-Time Clock DS1305N+ Analog Devices / Maxim Integrated 1: $18.04 1,067In Stock	Mfr. Part # DS1305N+ Mouser Part # 700-DS1305N	Analog Devices / Maxim Integrated	Real Time Clock Serial Alarm Real-Time Clock	Datasheet	1,067In Stock	$18.04 $14.13 $13.13 $12.06 View $11.83 $11.25 $10.99 Quote	Min.: 1 Mult.: 1	Serial 3-Wire, SPI	YY-MM-DD	HH:MM:SS (24 hr)	DIP-16	Backup Switching	2 V	5.5 V	- 40 C	+ 85 C	DS1305N	Through Hole	Tube
Real Time Clock Y2K-Compliant Watchdog Real-Time Clocks DS1501YN+ Analog Devices / Maxim Integrated 1: $17.89 162In Stock	Mfr. Part # DS1501YN+ Mouser Part # 700-DS1501YN	Analog Devices / Maxim Integrated	Real Time Clock Y2K-Compliant Watchdog Real-Time Clocks	Datasheet	162In Stock	$17.89 $17.50 $17.12 $16.77 View $16.52 $16.26 Quote	Min.: 1 Mult.: 1	Parallel	YY-MM-DD-dd	HH:MM:SS (24 hr)	PDIP-28	Backup Switching	4.5 V	5.5 V	- 40 C	+ 85 C	DS1501YN	Through Hole	Tube
Real Time Clock RTCs with Constant-Voltage Trickle Charg DS12CR887-5+ Analog Devices / Maxim Integrated 1: $17.88 392In Stock	Mfr. Part # DS12CR887-5+ Mouser Part # 700-DS12CR887-5+	Analog Devices / Maxim Integrated	Real Time Clock RTCs with Constant-Voltage Trickle Charg	Datasheet	392In Stock	$17.88 $17.49 $17.11 $16.76 View $16.50 $16.25 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: $50.15 80In Stock	Mfr. Part # DS1315EN-33+ Mouser Part # 700-DS1315EN-33	Analog Devices / Maxim Integrated	Real Time Clock Phantom Time Chip	Datasheet	80In Stock	$50.15 $40.61 $38.22 $36.63 View $34.35 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: $44.30 65In Stock	Mfr. Part # DS1315S-33+ Mouser Part # 700-DS1315S-33	Analog Devices / Maxim Integrated	Real Time Clock Phantom Time Chip	Datasheet	65In Stock	$44.30 $35.87 $33.76 $32.36 View $30.33 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: $6.19 325In Stock	Mfr. Part # DS1388Z-3+ Mouser Part # 700-DS1388Z-3	Analog Devices / Maxim Integrated	Real Time Clock I C RTC/Supervisor with Trickle Charger	Datasheet	325In Stock	$6.19 $6.06 $5.93 $5.81 View $5.72 $5.63 $5.55 $5.46	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 DS1390U-3+ Analog Devices / Maxim Integrated 1: $4.81 365In Stock	Mfr. Part # DS1390U-3+ Mouser Part # 700-DS1390U-3	Analog Devices / Maxim Integrated	Real Time Clock Low-Voltage SPI/3-Wire RTCs with Trickle	Datasheet	365In Stock	$4.81 $4.71 $4.60 $4.51 View $4.43 $4.37 $4.30 $4.24	Min.: 1 Mult.: 1	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