Real Time Clocks

Use the filters and product table below to compare Real Time Clocks components by manufacturer, availability, pricing reference and technical specifications. Review datasheets and key parameters to narrow the selection for your application.

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Mfr. Part #	Availability	Price	Quantity	Datasheet	Series	Package/Case	Packaging	Product Status	Programmable	Type	Features	Memory Size	Time Format	Date Format	Interface	Voltage - Supply	Voltage - Supply, Battery	Current - Timekeeping (Max)	Operating Temperature	Mounting Type	Grade	Qualification	Supplier Device Package
M41ST95WMX6TR IC RTC CLK/CALENDAR SPI 28SO STMicroelectronics	4,160	-	RFQ	Datasheet	-	28-SOIC (0.295", 7.50mm Width)	Tape & Reel (TR)	Obsolete	Not Verified	Clock/Calendar	Alarm, Leap Year, NVSRAM, Square Wave Output, Supervisor, Watchdog Timer	44B	HH:MM:SS:hh (24 hr)	YY-MM-DD-dd	SPI	2.7V ~ 3.6V	2.5V ~ 3.5V	1.4mA @ 2.7V ~ 3.6V	-40°C ~ 85°C	Surface Mount	-	-	28-SO
M41ST85WMX6 IC RTC CLOCK/CALENDAR I2C 28SO STMicroelectronics	3,623	-	RFQ	Datasheet	-	28-SOIC (0.295", 7.50mm Width)	Tube	Obsolete	Not Verified	Clock/Calendar	Alarm, Leap Year, NVSRAM, Square Wave Output, Supervisor, Watchdog Timer	44B	HH:MM:SS:hh (24 hr)	YY-MM-DD-dd	I2C, 2-Wire Serial	2.7V ~ 3.6V	2.5V ~ 3.5V	0.5mA @ 2.7V ~ 3.6V	-40°C ~ 85°C	Surface Mount	-	-	28-SO
M41ST95WMX6 IC RTC CLK/CALENDAR SPI 28SO STMicroelectronics	2,782	-	RFQ	Datasheet	-	28-SOIC (0.295", 7.50mm Width)	Tube	Obsolete	Not Verified	Clock/Calendar	Alarm, Leap Year, NVSRAM, Square Wave Output, Supervisor, Watchdog Timer	44B	HH:MM:SS:hh (24 hr)	YY-MM-DD-dd	SPI	2.7V ~ 3.6V	2.5V ~ 3.5V	1.4mA @ 2.7V ~ 3.6V	-40°C ~ 85°C	Surface Mount	-	-	28-SO
M41ST84WMQ6F IC RTC CLOCK/CALENDAR I2C 16SO STMicroelectronics	2,749	-	RFQ	Datasheet	-	16-SOIC (0.154", 3.90mm Width)	Tape & Reel (TR)	Obsolete	Not Verified	Clock/Calendar	Alarm, Leap Year, NVSRAM, Square Wave Output, Supervisor, Watchdog Timer	44B	HH:MM:SS:hh (24 hr)	YY-MM-DD-dd	I2C, 2-Wire Serial	2.7V ~ 3.6V	2.5V ~ 3.5V	0.5mA @ 2.7V ~ 3.6V	-40°C ~ 85°C	Surface Mount	-	-	16-SO
M41ST85WMH6TR IC RTC CLK/CALENDAR I2C 28SOH STMicroelectronics	3,947	-	RFQ	Datasheet	-	28-SOP (0.350", 8.89mm Width) with SNAPHAT Sockets	Tape & Reel (TR)	Obsolete	Not Verified	Clock/Calendar	Alarm, Leap Year, NVSRAM, Square Wave Output, Supervisor, Watchdog Timer	44B	HH:MM:SS:hh (24 hr)	YY-MM-DD-dd	I2C, 2-Wire Serial	2.7V ~ 3.6V	2.5V ~ 3.5V	0.5mA @ 2.7V ~ 3.6V	-40°C ~ 85°C	Surface Mount	-	-	28-SOH
M48T86PC1 IC RTC CLK/CALENDAR PAR 24-DIP STMicroelectronics	2,005	-	RFQ	Datasheet	-	24-DIP Module (0.600", 15.24mm)	Tube	Obsolete	Not Verified	Clock/Calendar	Alarm, Leap Year, NVSRAM, Square Wave Output	114B	HH:MM:SS (12/24 hr)	YY-MM-DD-dd	Parallel	4.5V ~ 5.5V	-	15mA @ 4.5V ~ 5.5V	0°C ~ 70°C	Through Hole	-	-	24-PCDIP, CAPHAT®
M41T56MH6F IC RTC CLK/CALENDAR I2C 28SOH STMicroelectronics	3,921	-	RFQ	Datasheet	-	28-SOP (0.350", 8.89mm Width) with SNAPHAT Sockets	Tape & Reel (TR)	Obsolete	Not Verified	Clock/Calendar	Leap Year, NVSRAM	56B	HH:MM:SS (24 hr)	YY-MM-DD-dd	I2C, 2-Wire Serial	4.5V ~ 5.5V	2.5V ~ 3.5V	100µA (Typ) @ 4.5V ~ 5.5V	-40°C ~ 85°C	Surface Mount	-	-	28-SOH
M41ST87YMX6TR IC RTC CLOCK/CALENDAR I2C 28SO STMicroelectronics	1,811	-	RFQ	Datasheet	-	28-SOIC (0.295", 7.50mm Width)	Tape & Reel (TR)	Obsolete	Not Verified	Clock/Calendar	Alarm, Leap Year, NVSRAM, Square Wave Output, Supervisor, Watchdog Timer	128B	HH:MM:SS:hh (24 hr)	YY-MM-DD-dd	I2C, 2-Wire Serial	4.5V ~ 5.5V	2.5V ~ 5.5V	1mA @ 4.5V ~ 5.5V	-40°C ~ 85°C	Surface Mount	-	-	28-SO
M41ST87YMX6 IC RTC CLOCK/CALENDAR I2C 28SO STMicroelectronics	4,653	-	RFQ	Datasheet	-	28-SOIC (0.295", 7.50mm Width)	Tube	Obsolete	Not Verified	Clock/Calendar	Alarm, Leap Year, NVSRAM, Square Wave Output, Supervisor, Watchdog Timer	128B	HH:MM:SS:hh (24 hr)	YY-MM-DD-dd	I2C, 2-Wire Serial	4.5V ~ 5.5V	2.5V ~ 5.5V	1mA @ 4.5V ~ 5.5V	-40°C ~ 85°C	Surface Mount	-	-	28-SO
M41ST87WMX6 IC RTC CLOCK/CALENDAR I2C 28SO STMicroelectronics	1,452	-	RFQ	Datasheet	-	28-SOIC (0.295", 7.50mm Width)	Tube	Obsolete	Not Verified	Clock/Calendar	Alarm, Leap Year, NVSRAM, Square Wave Output, Supervisor, Watchdog Timer	128B	HH:MM:SS:hh (24 hr)	YY-MM-DD-dd	I2C, 2-Wire Serial	2.7V ~ 3.6V	2.5V ~ 3.6V	0.5mA @ 2.7V ~ 3.6V	-40°C ~ 85°C	Surface Mount	-	-	28-SO

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FREQUENTLY ASKED QUESTIONS

Real Time Clocks FAQ

Common questions about filtering, comparing and sourcing Real Time Clocks components.

How can I narrow the Real Time Clocks selection?

Use the available manufacturer and technical parameter filters to reduce the product list. Compare the remaining part numbers against your electrical, package and application requirements.

Should I confirm the datasheet before selecting a part?

Yes. Always review the manufacturer datasheet to confirm ratings, package, operating conditions and other technical details before finalizing a component for your design.

Can Winsun (HK) Electronics help source a specific Real Time Clocks part number?

Yes. Send the exact manufacturer part number and required quantity for availability, lead-time and quotation support.

Do you support BOM, shortage or alternative-part requirements?

Yes. You can submit a BOM or shortage list for sourcing assistance. Where appropriate, our team can also help review possible alternative-part options.