.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: 791

Applied Filters:

Manufacturer

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

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 (HKD) 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 Serial 1280 (160x8) M41ST87WMX6TR STMicroelectronics 1: HK$88.69 1,148In Stock	Mfr. Part No. M41ST87WMX6TR Mouser Part No 511-M41ST87WMX6TR	STMicroelectronics	Real Time Clock Serial 1280 (160x8)	Datasheet	1,148In Stock	Cut Tape HK$88.69 HK$69.21 HK$64.36 HK$59.02 View Reel HK$52.85 HK$56.06 HK$54.99 HK$52.85 Quote MouseReel Available	Min.: 1 Mult.: 1 : 1,000	Serial	YY-MM-DD-dd	HH:MM:SS:hh (12 hr, 24 hr)	SOX-28	Backup Switching	2.7 V	3.6 V	- 40 C	+ 85 C	M41ST87W	SMD/SMT	Reel, Cut Tape, MouseReel
Real Time Clock 2.0 to 5.5V 64 (8X8) M41T00SM6F STMicroelectronics 1: HK$35.10 1,798In Stock 5,000Expected 25/11/2026	Mfr. Part No. M41T00SM6F Mouser Part No 511-M41T00SM6F	STMicroelectronics	Real Time Clock 2.0 to 5.5V 64 (8X8)	Datasheet	1,798In Stock 5,000Expected 25/11/2026	Cut Tape HK$35.10 HK$26.55 HK$24.41 HK$22.03 View Reel HK$18.91 HK$20.88 HK$20.63 HK$19.89 HK$18.91 MouseReel Available	Min.: 1 Mult.: 1 : 2,500	Serial	YYYY-MM-DD	HH:MM:SS (24 hr)	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: HK$38.63 2,176In Stock 12,500On Order	Mfr. Part No. M41T0M6F Mouser Part No 511-M41T0M6F	STMicroelectronics	Real Time Clock Serial 64 (8X8)	Datasheet	2,176In Stock 12,500On Order On Order Ship Dates Mfr. No: M41T0M6F Stock: 2,176 Can Dispatch Immediately On Order: 5,000 Expected 22/12/2026 7,500 Expected 17/5/2027 Factory Lead Time: 30 Weeks	Cut Tape HK$38.63 HK$29.18 HK$26.80 HK$24.25 View Reel HK$20.88 HK$23.02 HK$22.85 HK$21.45 HK$20.88 MouseReel Available	Min.: 1 Mult.: 1 : 2,500	Serial 2-Wire, I2C	YY-MM-DD-dd	HH:MM:SS (24 hr)	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: HK$29.67 1,784In Stock 2,500Expected 24/5/2027	Mfr. Part No. M41T11M6F Mouser Part No 511-M41T11M6F	STMicroelectronics	Real Time Clock Serial 512 (64x8)	Datasheet	1,784In Stock 2,500Expected 24/5/2027	Cut Tape HK$29.67 HK$22.36 HK$20.47 HK$18.41 Reel HK$15.54 View HK$17.34 HK$17.02 HK$16.11 HK$14.88 MouseReel Available	Min.: 1 Mult.: 1 : 2,500	Serial	YY-MM-DD-dd	HH:MM:SS (24 hr)	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: HK$83.76 1,385In Stock	Mfr. Part No. M41T11MH6F Mouser Part No 511-M41T11MH6F	STMicroelectronics	Real Time Clock Serial 512 (64x8)	Datasheet	1,385In Stock	Cut Tape HK$83.76 HK$65.18 HK$60.58 HK$55.40 Reel HK$49.48 View HK$52.61 HK$49.57 HK$46.36 Quote MouseReel Available	Min.: 1 Mult.: 1 : 936	Serial	YY-MM-DD-dd	HH:MM:SS (24 hr)	SOX-28	Backup Switching	2 V	5.5 V	- 40 C	+ 85 C	M41T11	SMD/SMT	Reel, Cut Tape, MouseReel
Real Time Clock Serial 160 (20x8) M41T80M6F STMicroelectronics 1: HK$47.27 1,840In Stock	Mfr. Part No. M41T80M6F Mouser Part No 511-M41T80M6F	STMicroelectronics	Real Time Clock Serial 160 (20x8)	Datasheet	1,840In Stock	Cut Tape HK$47.27 HK$36.58 HK$33.54 HK$30.58 View Reel HK$27.37 HK$28.93 HK$28.03 HK$27.62 HK$27.37 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)	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 512 (64x8) M41T81M6F STMicroelectronics 1: HK$24.99 1,692In Stock 5,000Expected 23/8/2027	Mfr. Part No. M41T81M6F Mouser Part No 511-M41T81M6F	STMicroelectronics	Real Time Clock Serial 512 (64x8)	Datasheet	1,692In Stock 5,000Expected 23/8/2027	Cut Tape HK$24.99 HK$18.74 HK$17.18 HK$15.45 View Reel HK$12.25 HK$14.63 HK$13.89 HK$13.23 HK$12.25 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	2 V	5.5 V	- 40 C	+ 85 C	M41T81	SMD/SMT	Reel, Cut Tape, MouseReel
Real Time Clock 2.0-5.5V 512 (64x8) M41T81SM6F STMicroelectronics 1: HK$24.58 3,155In Stock 17,500On Order	Mfr. Part No. M41T81SM6F Mouser Part No 511-M41T81SM6F	STMicroelectronics	Real Time Clock 2.0-5.5V 512 (64x8)	Datasheet	3,155In Stock 17,500On Order On Order Ship Dates Mfr. No: M41T81SM6F Stock: 3,155 Can Dispatch Immediately On Order: 7,500 Expected 19/7/2027 10,000 Expected 18/10/2027 Factory Lead Time: 30 Weeks	Cut Tape HK$24.58 HK$18.33 HK$16.77 HK$15.12 Reel HK$12.99 View HK$14.30 HK$13.81 HK$13.73 HK$12.66 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	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: HK$35.59 2,500Expected 28/12/2026	Mfr. Part No. M41T82RM6F Mouser Part No 511-M41T82RM6F	STMicroelectronics	Real Time Clock Serial I2C bus RTC	Datasheet	2,500Expected 28/12/2026	Cut Tape HK$35.59 HK$26.80 HK$24.66 HK$22.28 Reel HK$19.07 View HK$21.13 HK$20.96 HK$19.73 HK$18.99 MouseReel Available	Min.: 1 Mult.: 1 : 2,500	Serial	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	M41T82	SMD/SMT	Reel, Cut Tape, MouseReel
Real Time Clock Serial I2C bus RTC M41T82SM6F STMicroelectronics 1: HK$26.80 3,212In Stock 5,000Expected 8/11/2027	Mfr. Part No. M41T82SM6F Mouser Part No 511-M41T82SM6F	STMicroelectronics	Real Time Clock Serial I2C bus RTC	Datasheet	3,212In Stock 5,000Expected 8/11/2027	Cut Tape HK$26.80 HK$20.06 HK$18.41 HK$16.52 Reel HK$13.81 View HK$15.62 HK$15.21 HK$14.80 HK$13.65 MouseReel Available	Min.: 1 Mult.: 1 : 2,500	Serial	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	M41T82	SMD/SMT	Reel, Cut Tape, MouseReel
Real Time Clock Serial I2C bus RTC M41T82ZM6F STMicroelectronics 1: HK$29.18 5,176In Stock 12,500Expected 25/10/2027	Mfr. Part No. M41T82ZM6F Mouser Part No 511-M41T82ZM6F	STMicroelectronics	Real Time Clock Serial I2C bus RTC	Datasheet	5,176In Stock 12,500Expected 25/10/2027	Cut Tape HK$29.18 HK$21.95 HK$20.14 HK$18.08 Reel HK$15.95 View HK$17.10 HK$16.69 HK$16.19 HK$15.70 MouseReel Available	Min.: 1 Mult.: 1 : 2,500	Serial	YY-MM-DD-dd	HH:MM:SS:hh (12 hr, 24 hr)	SOIC-8	Backup Switching	2.38 V	5.5 V	- 40 C	+ 85 C	M41T82	SMD/SMT	Reel, Cut Tape, MouseReel
Real Time Clock SPI RTC 32.768 kHz 365nA 2.0V to 5.5V M41T93RQA6F STMicroelectronics 1: HK$68.88 1,083In Stock	Mfr. Part No. M41T93RQA6F Mouser Part No 511-M41T93RQA6F	STMicroelectronics	Real Time Clock SPI RTC 32.768 kHz 365nA 2.0V to 5.5V	Datasheet	1,083In Stock	Cut Tape HK$68.88 HK$53.10 HK$49.16 HK$44.88 Reel HK$40.20 View HK$41.51 HK$39.62 Quote MouseReel Available	Min.: 1 Mult.: 1 : 1,000	SPI	YY-MM-DD-dd	HH:MM:SS:hh (12 hr, 24 hr)	QFN-16	Backup Switching	2.7 V	5.5 V	- 40 C	+ 85 C	M41T93	SMD/SMT	Reel, Cut Tape, MouseReel
Real Time Clock Serial SPI bus RTC M41T93ZMY6F STMicroelectronics 1: HK$87.71 757In Stock	Mfr. Part No. M41T93ZMY6F Mouser Part No 511-M41T93ZMY6F	STMicroelectronics	Real Time Clock Serial SPI bus RTC	Datasheet	757In Stock	Cut Tape HK$87.71 HK$68.47 HK$63.71 HK$58.44 View Reel HK$53.02 HK$55.90 HK$55.32 HK$53.02 Quote MouseReel Available	Min.: 1 Mult.: 1 : 1,000	SPI	YY-MM-DD-dd	HH:MM:SS:hh (12 hr, 24 hr)	SOX-18	Backup Switching	2.38 V	5.5 V	- 40 C	+ 85 C	M41T93	SMD/SMT	Reel, Cut Tape, MouseReel
Real Time Clock Serial 512 (64x8) M41T94MQ6F STMicroelectronics 1: HK$45.05 2,618In Stock 5,000Expected 28/4/2027	Mfr. Part No. M41T94MQ6F Mouser Part No 511-M41T94MQ6F	STMicroelectronics	Real Time Clock Serial 512 (64x8)	Datasheet	2,618In Stock 5,000Expected 28/4/2027	Cut Tape HK$45.05 HK$34.36 HK$31.73 HK$28.77 View Reel HK$24.74 HK$27.37 HK$26.80 HK$26.55 HK$24.74 Quote MouseReel Available	Min.: 1 Mult.: 1 : 2,500	Serial	YY-MM-DD-dd	HH:MM:SS:hh (12 hr, 24 hr)	SO-16	Backup Switching	2.7 V	5.5 V	- 40 C	+ 85 C	M41T94	SMD/SMT	Reel, Cut Tape, MouseReel
Real Time Clock 16K (2Kx8) 150ns M48T02-150PC1 STMicroelectronics 1: HK$257.29 637In Stock	Mfr. Part No. M48T02-150PC1 Mouser Part No 511-M48T0215PC1	STMicroelectronics	Real Time Clock 16K (2Kx8) 150ns	Datasheet	637In Stock	HK$257.29 HK$204.51 HK$187.01 HK$177.14 HK$170.40	Min.: 1 Mult.: 1	Parallel	YY-MM-DD-dd	HH:MM:SS (24 hr)	PCDIP-24	Integrated Battery	4.75 V	5.5 V	0 C	+ 70 C	M48T02	Through Hole	Tube
Real Time Clock 16K (2Kx8) 70ns M48T02-70PC1 STMicroelectronics 1: HK$246.35 430In Stock	Mfr. Part No. M48T02-70PC1 Mouser Part No 511-M48T0270PC1	STMicroelectronics	Real Time Clock 16K (2Kx8) 70ns	Datasheet	430In Stock	HK$246.35 HK$195.64 HK$184.62 HK$171.39 View HK$165.39 HK$159.55 Quote	Min.: 1 Mult.: 1	Parallel	YY-MM-DD-dd	HH:MM:SS (24 hr)	PCDIP-24	Integrated Battery	4.75 V	5.5 V	0 C	+ 70 C	M48T02	Through Hole	Tube
Real Time Clock 64K (8Kx8) 150ns M48T08-150PC1 STMicroelectronics 1: HK$333.81 253In Stock 480Expected 5/11/2026	Mfr. Part No. M48T08-150PC1 Mouser Part No 511-M48T0815PC1	STMicroelectronics	Real Time Clock 64K (8Kx8) 150ns	Datasheet	253In Stock 480Expected 5/11/2026	HK$333.81 HK$268.79 HK$251.94 HK$244.22 View HK$228.68 Quote	Min.: 1 Mult.: 1	Parallel	YY-MM-DD-dd	HH:MM:SS (24 hr)	PCDIP-28	Integrated Battery	4.75 V	5.5 V	0 C	+ 70 C	M48T08	Through Hole	Tube
Real Time Clock 256K (32Kx8) 70ns M48T35-70PC1 STMicroelectronics 1: HK$449.06 236In Stock	Mfr. Part No. M48T35-70PC1 Mouser Part No 511-M48T3570PC1	STMicroelectronics	Real Time Clock 256K (32Kx8) 70ns	Datasheet	236In Stock	HK$449.06 HK$365.38 HK$343.10 HK$323.70 View HK$323.54 Quote	Min.: 1 Mult.: 1	Parallel	YY-MM-DD-dd	HH:MM:SS (24 hr)	PCDIP-28	Integrated Battery	4.75 V	5.5 V	0 C	+ 70 C	M48T35	Through Hole	Tube
Real Time Clock 256K (32Kx8) 70ns M48T35Y-70MH1F STMicroelectronics 1: HK$198.92 235In Stock	Mfr. Part No. M48T35Y-70MH1F Mouser Part No 511-M48T35Y-70MH1F	STMicroelectronics	Real Time Clock 256K (32Kx8) 70ns	Datasheet	235In Stock	Cut Tape HK$198.92 HK$159.30 HK$149.36 HK$138.51 View Reel HK$127.08 HK$135.55 HK$127.16 HK$127.08 Quote MouseReel Available	Min.: 1 Mult.: 1 : 936	Parallel	YY-MM-DD-dd	HH:MM:SS (24 hr)	SOX-28	Backup Switching	4.5 V	5.5 V	0 C	+ 70 C	M48T35Y	SMD/SMT	Reel, Cut Tape, MouseReel
Real Time Clock 256K (32Kx8) 70ns M48T35Y-70PC1 STMicroelectronics 1: HK$420.21 56In Stock 480Expected 5/11/2026	Mfr. Part No. M48T35Y-70PC1 Mouser Part No 511-M48T35Y70PC1	STMicroelectronics	Real Time Clock 256K (32Kx8) 70ns	Datasheet	56In Stock 480Expected 5/11/2026	HK$420.21 HK$340.31 HK$319.26 HK$303.89 HK$289.02	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	M48T35Y	Through Hole	Tube
Real Time Clock 64K (8Kx8) 70ns M48T58-70PC1 STMicroelectronics 1: HK$393.41 179In Stock	Mfr. Part No. M48T58-70PC1 Mouser Part No 511-M48T5870PC1	STMicroelectronics	Real Time Clock 64K (8Kx8) 70ns	Datasheet	179In Stock	HK$393.41 HK$320.09 HK$300.77 HK$294.19 View HK$276.77 Quote	Min.: 1 Mult.: 1	Parallel	YY-MM-DD-dd	HH:MM:SS (24 hr)	PCDIP-28	Integrated Battery	4.75 V	5.5 V	0 C	+ 70 C	M48T58	Through Hole	Tube
Real Time Clock 64K (8Kx8) 70ns M48T58Y-70PC1 STMicroelectronics 1: HK$306.93 415In Stock	Mfr. Part No. M48T58Y-70PC1 Mouser Part No 511-M48T58Y70PC1	STMicroelectronics	Real Time Clock 64K (8Kx8) 70ns	Datasheet	415In Stock	HK$306.93 HK$247.18 HK$231.89 HK$220.30 View HK$210.27 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	M48T58Y	Through Hole	Tube
Real Time Clock I2C GP RTCC 64B SRAM MCP7940NT-I/MNY Microchip Technology 1: HK$8.30 9,606In Stock	Mfr. Part No. MCP7940NT-I/MNY Mouser Part No 579-MCP7940NT-I/MNY	Microchip Technology	Real Time Clock I2C GP RTCC 64B SRAM Learn More about Microchip Technology microchip mcp7940n calendar	Datasheet	9,606In Stock	Cut Tape HK$8.30 Reel HK$6.96 MouseReel Available	Min.: 1 Mult.: 1 : 3,300	Serial 2-Wire, I2C	YY-MM-DD-dd	HH:MM:SS:hh (12 hr, 24 hr)	TDFN-8	Backup Switching	1.8 V	5.5 V	- 40 C	+ 85 C		SMD/SMT	Reel, Cut Tape, MouseReel
Real Time Clock I2C GP RTCC 1Kb EE 64B SRAM ID MCP79410T-I/MNY Microchip Technology 1: HK$10.11 3,173In Stock	Mfr. Part No. MCP79410T-I/MNY Mouser Part No 579-MCP79410T-I/MNY	Microchip Technology	Real Time Clock I2C GP RTCC 1Kb EE 64B SRAM ID Learn More about Microchip Technology microchip mcp794xx calendars	Datasheet	3,173In Stock	Cut Tape HK$10.11 Reel HK$8.47 MouseReel Available	Min.: 1 Mult.: 1 : 3,300	I2C	YY-MM-DD-dd	HH:MM:SS:hh (12 hr, 24 hr)	TDFN-8	Backup Switching	1.8 V	5.5 V	- 40 C	+ 85 C		SMD/SMT	Reel, Cut Tape, MouseReel
Real Time Clock I2C GP RTCC 1Kb EE 64B SRAM EUI-48 MCP79411T-I/SN Microchip Technology 1: HK$10.11 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 HK$10.11 Reel HK$8.47 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