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Real Time Clock

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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.	RTC Bus Interface	Date Format	Time Format	Memory Size	Package / Case	Battery Backup Switching	Supply Voltage - Min	Supply Voltage - Max	Minimum Operating Temperature	Maximum Operating Temperature	Series	Mounting Style	Packaging
Real Time Clock 64K (8Kx8) 100ns M48T08-100PC1 STMicroelectronics 1: $37.34 1,484In Stock	Mfr. Part # M48T08-100PC1 Mouser Part # 511-M48T0810PC1	STMicroelectronics	Real Time Clock 64K (8Kx8) 100ns	Datasheet	1,484In Stock	$37.34 $28.92 $27.34 $26.17 View $25.03 $23.91	Min.: 1 Mult.: 1	Parallel	YY-MM-DD-dd	HH:MM:SS (24 hr)	8 kB	PCDIP-28	Integrated Battery	4.75 V	5.5 V	0 C	+ 70 C	M48T08	Through Hole	Tube
Real Time Clock 16K (2Kx8) 70ns M48T12-70PC1 STMicroelectronics 1: $41.26 864In Stock	Mfr. Part # M48T12-70PC1 Mouser Part # 511-M48T1270PC1	STMicroelectronics	Real Time Clock 16K (2Kx8) 70ns	Datasheet	864In Stock	$41.26 $29.25 $28.30 $26.98 $26.40	Min.: 1 Mult.: 1	Parallel	YY-MM-DD-dd	HH:MM:SS (24 hr)	8 kB	PCDIP-24	Integrated Battery	4.5 V	5.5 V	0 C	+ 70 C	M48T12	Through Hole	Tube
Real Time Clock 64K (8Kx8) 150ns M48T18-150PC1 STMicroelectronics 1: $50.47 408In Stock	Mfr. Part # M48T18-150PC1 Mouser Part # 511-M48T1815PC1	STMicroelectronics	Real Time Clock 64K (8Kx8) 150ns	Datasheet	408In Stock	$50.47 $38.12 $36.45 $35.82 View $35.80 Quote	Min.: 1 Mult.: 1	Parallel	YY-MM-DD-dd	HH:MM:SS (24 hr)	8 kB	PCDIP-28	Integrated Battery	4.5 V	5.5 V	0 C	+ 70 C	M48T18	Through Hole	Tube
Real Time Clock 64K (8Kx8) 100ns M48T08Y-10MH1F STMicroelectronics 1: $41.13 967In Stock	Mfr. Part # M48T08Y-10MH1F Mouser Part # 511-M48T08Y-10MH1F	STMicroelectronics	Real Time Clock 64K (8Kx8) 100ns	Datasheet	967In Stock	Cut Tape $41.13 $33.30 $31.34 $30.04 View Reel $26.42 $28.16 $27.15 $26.42 Quote MouseReel Available	Min.: 1 Mult.: 1 : 936	Parallel	YY-MM-DD-dd	HH:MM:SS (24 hr)	64 kB	SOX-28	Backup Switching	4.5 V	5.5 V	0 C	+ 70 C	M48T08Y	SMD/SMT	Reel, Cut Tape, MouseReel
Real Time Clock Low-Pwr serial RTC W/ battry switchover M41T01M6F STMicroelectronics 1: $3.84 2,355In Stock	Mfr. Part # M41T01M6F Mouser Part # 511-M41T01M6F	STMicroelectronics	Real Time Clock Low-Pwr serial RTC W/ battry switchover Learn More about STMicroelectronics stm standard products	Datasheet	2,355In Stock	Cut Tape $3.84 $2.95 $2.64 $2.40 View Reel $1.95 $2.28 $2.24 $2.16 $1.95 MouseReel Available	Min.: 1 Mult.: 1 : 2,500	Serial 2-Wire, I2C	YY-MM-DD-dd	HH:MM:SS (24 hr)	8 B	SOIC-8	Backup Switching	2 V	5.5 V	- 40 C	+ 85 C	M41T01	SMD/SMT	Reel, Cut Tape, MouseReel
Real Time Clock Serial 160 (20x8) M41T80M6F STMicroelectronics 1: $5.70 2,400In Stock	Mfr. Part # M41T80M6F Mouser Part # 511-M41T80M6F	STMicroelectronics	Real Time Clock Serial 160 (20x8)	Datasheet	2,400In Stock	Cut Tape $5.70 $4.41 $4.08 $3.69 View Reel $3.32 $3.52 $3.41 $3.36 $3.32 Quote MouseReel Available	Min.: 1 Mult.: 1 : 2,500	Serial 2-Wire, I2C	YY-MM-DD-dd	HH:MM:SS:hh (12 hr, 24 hr)	20 B	SOIC-8	No Backup Switching	2 V	5.5 V	- 40 C	+ 85 C	M41T80	SMD/SMT	Reel, Cut Tape, MouseReel
Real Time Clock Serial SPI bus RTC M41T93ZQA6F STMicroelectronics 1: $7.61 1,044In Stock	Mfr. Part # M41T93ZQA6F Mouser Part # 511-M41T93ZQA6F	STMicroelectronics	Real Time Clock Serial SPI bus RTC	Datasheet	1,044In Stock	Cut Tape $7.61 $6.13 $5.44 $4.96 View Reel $4.18 $4.72 $4.71 $4.18 Quote MouseReel Available	Min.: 1 Mult.: 1 : 1,000	Serial	YY-MM-DD-dd	HH:MM:SS:hh (12 hr, 24 hr)	32 B		Backup Switching	2.38 V	5.5 V	- 40 C	+ 85 C	M41T93	SMD/SMT	Reel, Cut Tape, MouseReel
Real Time Clock Serial I2C bus RTC M41T83ZMY6F STMicroelectronics 1: $7.40 765In Stock	Mfr. Part # M41T83ZMY6F Mouser Part # 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)	32 B		Backup Switching	2.38 V	5.5 V	- 40 C	+ 85 C	M41T83	SMD/SMT	Reel, Cut Tape, MouseReel
Real Time Clock Serial SPI bus RTC M41T93SQA6F STMicroelectronics 1: $8.11 166In Stock	Mfr. Part # M41T93SQA6F Mouser Part # 511-M41T93SQA6F	STMicroelectronics	Real Time Clock Serial SPI bus RTC	Datasheet	166In Stock	Cut Tape $8.11 $6.25 $5.79 $5.28 $4.89 Reel $4.88 MouseReel Available	Min.: 1 Mult.: 1 : 1,000	SPI	YY-MM-DD-dd	HH:MM:SS:hh (12 hr, 24 hr)	32 B	QFN-16	Backup Switching	3 V	5.5 V	- 40 C	+ 85 C	M41T93	SMD/SMT	Reel, Cut Tape, MouseReel
Real Time Clock 256K (32Kx8) 100ns M48T37V-10MH1F STMicroelectronics 1: $23.05 360In Stock	Mfr. Part # M48T37V-10MH1F Mouser Part # 511-M48T37V-10MH1F	STMicroelectronics	Real Time Clock 256K (32Kx8) 100ns	Datasheet	360In Stock	Cut Tape $23.05 $20.12 $17.99 $16.94 View Reel $15.34 $16.52 $15.88 $15.34 Quote MouseReel Available	Min.: 1 Mult.: 1 : 936	Parallel	YY-MM-DD-dd	HH:MM:SS (24 hr)	256 kB	SOIC-44	Backup Switching	3 V	3.6 V	0 C	+ 70 C	M48T37V	SMD/SMT	Reel, Cut Tape, MouseReel
Real Time Clock Serial I2C bus RTC M41T82ZM6F STMicroelectronics 1: $3.55 7,928In Stock	Mfr. Part # M41T82ZM6F Mouser Part # 511-M41T82ZM6F	STMicroelectronics	Real Time Clock Serial I2C bus RTC	Datasheet	7,928In Stock	Cut Tape $3.55 $2.67 $2.45 $2.20 Reel $1.94 View $2.08 $2.03 $1.97 $1.91 MouseReel Available	Min.: 1 Mult.: 1 : 2,500	Serial	YY-MM-DD-dd	HH:MM:SS:hh (12 hr, 24 hr)	32 B	SOIC-8	Backup Switching	2.38 V	5.5 V	- 40 C	+ 85 C	M41T82	SMD/SMT	Reel, Cut Tape, MouseReel
Real Time Clock Serial SPI bus RTC M41T93RMY6F STMicroelectronics 1: $10.67 2,229In Stock 4,000Expected 10/13/2026	Mfr. Part # M41T93RMY6F Mouser Part # 511-M41T93RMY6F	STMicroelectronics	Real Time Clock Serial SPI bus RTC	Datasheet	2,229In Stock 4,000Expected 10/13/2026	Cut Tape $10.67 $8.33 $7.75 $7.11 View Reel $6.45 $6.80 $6.73 $6.45 Quote MouseReel Available	Min.: 1 Mult.: 1 : 1,000	SPI	YY-MM-DD-dd	HH:MM:SS:hh (12 hr, 24 hr)	32 B	SOX-18	Backup Switching	2.7 V	5.5 V	- 40 C	+ 85 C	M41T93	SMD/SMT	Reel, Cut Tape, MouseReel
Real Time Clock 64K (8Kx8) 100ns M48T18-100PC1 STMicroelectronics 1: $46.96 907In Stock 480Expected 10/8/2026	Mfr. Part # M48T18-100PC1 Mouser Part # 511-M48T1810PC1	STMicroelectronics	Real Time Clock 64K (8Kx8) 100ns	Datasheet	907In Stock 480Expected 10/8/2026	$46.96 $37.96 $35.63 $34.91	Min.: 1 Mult.: 1	Parallel	YY-MM-DD-dd	HH:MM:SS (24 hr)	8 kB	PCDIP-28	Integrated Battery	4.5 V	5.5 V	0 C	+ 70 C	M48T18	Through Hole	Tube
Real Time Clock 64K (8Kx8) 70ns M48T58Y-70MH1F STMicroelectronics 1: $23.40 1,040In Stock	Mfr. Part # M48T58Y-70MH1F Mouser Part # 511-M48T58Y-70MH1F	STMicroelectronics	Real Time Clock 64K (8Kx8) 70ns	Datasheet	1,040In Stock	Cut Tape $23.40 $18.71 $17.54 $16.25 View Reel $15.12 $15.74 $15.12 $15.12 Quote MouseReel Available	Min.: 1 Mult.: 1 : 936	Parallel	YY-MM-DD-dd	HH:MM:SS (24 hr)	64 kB	SOX-28	Backup Switching	4.5 V	5.5 V	0 C	+ 70 C	M48T58Y	SMD/SMT	Reel, Cut Tape, MouseReel
Real Time Clock Serial 512 (64x8) M41ST85WMH6F STMicroelectronics 1: $10.39 565In Stock	Mfr. Part # M41ST85WMH6F Mouser Part # 511-M41ST85WMH6F	STMicroelectronics	Real Time Clock Serial 512 (64x8)	Datasheet	565In Stock	Cut Tape $10.39 $8.10 $7.53 $6.90 Reel $6.17 View $6.58 $6.35 $6.03 Quote MouseReel Available	Min.: 1 Mult.: 1 : 936	Serial	YY-MM-DD-dd	HH:MM:SS:hh (12 hr, 24 hr)	64 B	SOH-28	Backup Switching	2.7 V	3.6 V	- 40 C	+ 85 C	M41ST85W	SMD/SMT	Reel, Cut Tape, MouseReel
Real Time Clock Serial 1280 (160x8) M41ST87WMX6TR STMicroelectronics 1: $10.79 1,273In Stock	Mfr. Part # M41ST87WMX6TR Mouser Part # 511-M41ST87WMX6TR	STMicroelectronics	Real Time Clock Serial 1280 (160x8)	Datasheet	1,273In Stock	Cut Tape $10.79 $8.42 $7.83 $7.18 View Reel $6.43 $6.82 $6.69 $6.43 Quote MouseReel Available	Min.: 1 Mult.: 1 : 1,000	Serial	YY-MM-DD-dd	HH:MM:SS:hh (12 hr, 24 hr)	160 B	SOX-28	Backup Switching	2.7 V	3.6 V	- 40 C	+ 85 C	M41ST87W	SMD/SMT	Reel, Cut Tape, MouseReel
Real Time Clock 128 NVRAM Serial RTC 3.0 to 3.6 Vcc M41ST87WSS6F STMicroelectronics 1: $7.77 361In Stock 1,350On Order	Mfr. Part # M41ST87WSS6F Mouser Part # 511-M41ST87WSS6F	STMicroelectronics	Real Time Clock 128 NVRAM Serial RTC 3.0 to 3.6 Vcc	Datasheet	361In Stock 1,350On Order	Cut Tape $7.77 $6.00 $5.55 $5.07 Reel $4.35 View $4.76 $4.75 $4.13 MouseReel Available	Min.: 1 Mult.: 1 : 1,350	Serial 2-Wire, I2C	YY-MM-DD-dd	HH:MM:SS:hh (12 hr, 24 hr)	160 B	SSOP-20	Backup Switching	2.7 V	3.6 V	- 40 C	+ 85 C	M41ST87W	SMD/SMT	Reel, Cut Tape, MouseReel
Real Time Clock Serial 64 (8X8) M41T00M6F STMicroelectronics 1: $4.21 2,168In Stock 10,000On Order	Mfr. Part # M41T00M6F Mouser Part # 511-M41T00M6F	STMicroelectronics	Real Time Clock Serial 64 (8X8)	Datasheet	2,168In Stock 10,000On Order On Order Ship Dates Mfr. #: M41T00M6F Stock: 2,168 Can Ship Immediately On Order: 5,000 Expected 5/3/2027 5,000 TBD Factory Lead-Time: 30 Weeks	Cut Tape $4.21 $3.18 $2.93 $2.65 View Reel $2.17 $2.51 $2.45 $2.17 MouseReel Available	Min.: 1 Mult.: 1 : 2,500	Serial 2-Wire, I2C	YYYY-MM-DD	HH:MM:SS (24 hr)	8 B	SOIC-8	Backup Switching	2 V	5.5 V	- 40 C	+ 85 C	M41T00	SMD/SMT	Reel, Cut Tape, MouseReel
Real Time Clock 2.0 to 5.5V 64 (8X8) M41T00SM6F STMicroelectronics 1: $4.27 4,754In Stock 5,000Expected 11/25/2026	Mfr. Part # M41T00SM6F Mouser Part # 511-M41T00SM6F	STMicroelectronics	Real Time Clock 2.0 to 5.5V 64 (8X8)	Datasheet	4,754In Stock 5,000Expected 11/25/2026	Cut Tape $4.27 $3.23 $2.97 $2.68 View Reel $2.30 $2.54 $2.51 $2.42 $2.30 MouseReel Available	Min.: 1 Mult.: 1 : 2,500	Serial	YYYY-MM-DD	HH:MM:SS (24 hr)	8 B	SOIC-8	Backup Switching	2.7 V	5.5 V	- 40 C	+ 85 C	M41T00S	SMD/SMT	Reel, Cut Tape, MouseReel
Real Time Clock Serial 64 (8X8) M41T0M6F STMicroelectronics 1: $4.70 4,949In Stock 12,500On Order	Mfr. Part # M41T0M6F Mouser Part # 511-M41T0M6F	STMicroelectronics	Real Time Clock Serial 64 (8X8)	Datasheet	4,949In Stock 12,500On Order On Order Ship Dates Mfr. #: M41T0M6F Stock: 4,949 Can Ship Immediately On Order: 5,000 Expected 10/19/2026 7,500 Expected 5/17/2027 Factory Lead-Time: 30 Weeks	Cut Tape $4.70 $3.55 $3.26 $2.95 View Reel $2.54 $2.80 $2.78 $2.61 $2.54 Quote MouseReel Available	Min.: 1 Mult.: 1 : 2,500	Serial 2-Wire, I2C	YY-MM-DD-dd	HH:MM:SS (24 hr)	8 B	SOIC-8	No Backup Switching	2 V	5.5 V	- 40 C	+ 85 C	M41T0	SMD/SMT	Reel, Cut Tape, MouseReel
Real Time Clock Serial 512 (64x8) M41T11M6F STMicroelectronics 1: $3.61 2,817In Stock	Mfr. Part # M41T11M6F Mouser Part # 511-M41T11M6F	STMicroelectronics	Real Time Clock Serial 512 (64x8)	Datasheet	2,817In Stock	Cut Tape $3.61 $2.72 $2.49 $2.24 Reel $1.89 View $2.11 $2.07 $1.96 $1.81 MouseReel Available	Min.: 1 Mult.: 1 : 2,500	Serial	YY-MM-DD-dd	HH:MM:SS (24 hr)	64 B	SOIC-8	Backup Switching	2 V	5.5 V	- 40 C	+ 85 C	M41T11	SMD/SMT	Reel, Cut Tape, MouseReel
Real Time Clock Serial 512 (64x8) M41T11MH6F STMicroelectronics 1: $10.19 1,385In Stock	Mfr. Part # M41T11MH6F Mouser Part # 511-M41T11MH6F	STMicroelectronics	Real Time Clock Serial 512 (64x8)	Datasheet	1,385In Stock	Cut Tape $10.19 $7.93 $7.37 $6.74 Reel $6.02 View $6.40 $6.03 $5.64 Quote MouseReel Available	Min.: 1 Mult.: 1 : 936	Serial	YY-MM-DD-dd	HH:MM:SS (24 hr)	64 B	SOX-28	Backup Switching	2 V	5.5 V	- 40 C	+ 85 C	M41T11	SMD/SMT	Reel, Cut Tape, MouseReel
Real Time Clock Serial 512 (64x8) M41T56M6F STMicroelectronics 1: $3.13 2,492In Stock 7,500On Order	Mfr. Part # M41T56M6F Mouser Part # 511-M41T56M6F	STMicroelectronics	Real Time Clock Serial 512 (64x8)	Datasheet	2,492In Stock 7,500On Order On Order Ship Dates Mfr. #: M41T56M6F Stock: 2,492 Can Ship Immediately On Order: 2,500 Expected 9/13/2027 5,000 Expected 10/4/2027 Factory Lead-Time: 30 Weeks	Cut Tape $3.13 $2.38 $2.16 $1.97 Reel $1.58 View $1.88 $1.83 $1.78 $1.56 MouseReel Available	Min.: 1 Mult.: 1 : 2,500	I2C	YY-MM-DD-dd	HH:MM:SS (24 hr)	64 B	SOIC-8	Backup Switching	4.5 V	5.5 V	- 40 C	+ 85 C	M41T56	SMD/SMT	Reel, Cut Tape, MouseReel
Real Time Clock 2.0-5.5V 512 (64x8) M41T81SM6F STMicroelectronics 1: $2.89 3,436In Stock 15,000On Order	Mfr. Part # M41T81SM6F Mouser Part # 511-M41T81SM6F	STMicroelectronics	Real Time Clock 2.0-5.5V 512 (64x8)	Datasheet	3,436In Stock 15,000On Order On Order Ship Dates Mfr. #: M41T81SM6F Stock: 3,436 Can Ship Immediately On Order: 7,500 Expected 11/4/2026 7,500 Expected 7/19/2027 Factory Lead-Time: 30 Weeks	Cut Tape $2.89 $2.15 $1.96 $1.76 Reel $1.50 View $1.66 $1.63 $1.54 $1.47 MouseReel Available	Min.: 1 Mult.: 1 : 2,500	I2C	YY-MM-DD-dd	HH:MM:SS:hh (12 hr, 24 hr)	20 B	SOIC-8	Backup Switching	2.7 V	5.5 V	- 40 C	+ 85 C	M41T81S	SMD/SMT	Reel, Cut Tape, MouseReel
Real Time Clock Serial I2C bus RTC M41T82RM6F STMicroelectronics 1: $4.33 3,325In Stock 2,500Expected 12/28/2026	Mfr. Part # M41T82RM6F Mouser Part # 511-M41T82RM6F	STMicroelectronics	Real Time Clock Serial I2C bus RTC	Datasheet	3,325In Stock 2,500Expected 12/28/2026	Cut Tape $4.33 $3.26 $3.00 $2.71 Reel $2.32 View $2.57 $2.55 $2.40 $2.31 MouseReel Available	Min.: 1 Mult.: 1 : 2,500	Serial	YY-MM-DD-dd	HH:MM:SS:hh (12 hr, 24 hr)	32 B	SOIC-8	Backup Switching	2.7 V	5.5 V	- 40 C	+ 85 C	M41T82	SMD/SMT	Reel, Cut Tape, MouseReel