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.

If you already have a target part number, package, rating or quantity, send the requirement to Winsun (HK) Electronics for availability checks, BOM sourcing, shortage support and quotation assistance.

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RFQ & BOM Support Send your target MPN, quantity or BOM

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
M48T35AV-10MH6F IC RTC CLK/CALENDAR PAR 28SOH STMicroelectronics	2,854	-	RFQ	Datasheet	Timekeeper®	28-SOP (0.350", 8.89mm Width) with SNAPHAT Sockets	Tape & Reel (TR)	Obsolete	Not Verified	Clock/Calendar	Leap Year	-	HH:MM:SS (24 hr)	YY-MM-DD-dd	Parallel	3V ~ 3.6V	-	2mA @ 3V ~ 3.6V	-40°C ~ 85°C	Surface Mount	-	-	28-SOH
M48T37V-10MH6F IC RTC CLK/CALENDAR PAR 44SOH STMicroelectronics	3,960	-	RFQ	Datasheet	Timekeeper®	44-BSOP (0.337", 8.56mm Width) requires SNAPHAT	Tape & Reel (TR)	Obsolete	Not Verified	Clock/Calendar	Alarm, Leap Year, Watchdog Timer	-	HH:MM:SS (24 hr)	YY-MM-DD-dd	Parallel	3V ~ 3.6V	-	2mA @ 3V ~ 3.6V	-40°C ~ 85°C	Surface Mount	-	-	44-SOH
M48T37Y-70MH6F IC RTC CLK/CALENDAR PAR 44SOH STMicroelectronics	4,655	-	RFQ	Datasheet	Timekeeper®	44-BSOP (0.337", 8.56mm Width) requires SNAPHAT	Tape & Reel (TR)	Obsolete	Not Verified	Clock/Calendar	Alarm, Leap Year, Watchdog Timer	-	HH:MM:SS (24 hr)	YY-MM-DD-dd	Parallel	4.5V ~ 5.5V	-	3mA @ 4.5V ~ 5.5V	-40°C ~ 85°C	Surface Mount	-	-	44-SOH
M48T248Y-70PM1 IC RTC PHANTOM CHIP PAR 32DIP STMicroelectronics	1,537	-	RFQ	Datasheet	Timekeeper®	32-DIP Module (0.600", 15.24mm)	Tube	Obsolete	Not Verified	Phantom Time Chip	Leap Year	-	HH:MM:SS:hh (12/24 hr)	YY-MM-DD-dd	Parallel	4.5V ~ 5.5V	-	5mA @ 4.5V ~ 5.5V	0°C ~ 70°C	Through Hole	-	-	32-PMDIP
M48T128Y-70PM1 IC RTC CLK/CALENDAR PAR 32DIP STMicroelectronics	1,274	-	RFQ	Datasheet	Timekeeper®	32-DIP Module (0.600", 15.24mm)	Tube	Obsolete	Not Verified	Clock/Calendar	Leap Year	-	HH:MM:SS (24 hr)	YY-MM-DD-dd	Parallel	4.5V ~ 5.5V	-	4mA @ 4.5V ~ 5.5V	0°C ~ 70°C	Through Hole	-	-	32-PMDIP
M48T129V-85PM1 IC RTC CLOCK/CALENDAR PAR 32DIP STMicroelectronics	4,981	-	RFQ	Datasheet	Timekeeper®	32-DIP Module (0.600", 15.24mm)	Tube	Obsolete	Not Verified	Clock/Calendar	Alarm, Leap Year, Watchdog Timer	-	HH:MM:SS (24 hr)	YY-MM-DD-dd	Parallel	3V ~ 3.6V	-	3mA @ 3V ~ 3.6V	0°C ~ 70°C	Through Hole	-	-	32-PMDIP Module
M48T129Y-70PM1 IC RTC CLK/CALENDAR PAR 32DIP STMicroelectronics	3,040	-	RFQ	Datasheet	Timekeeper®	32-DIP Module (0.600", 15.24mm)	Tube	Obsolete	Not Verified	Clock/Calendar	Alarm, Leap Year, Watchdog Timer	-	HH:MM:SS (24 hr)	YY-MM-DD-dd	Parallel	4.5V ~ 5.5V	-	4mA @ 4.5V ~ 5.5V	0°C ~ 70°C	Through Hole	-	-	32-PMDIP
M48T251Y-70PM1 IC RTC PHANTOM CHIP PAR 32DIP STMicroelectronics	3,650	-	RFQ	Datasheet	Timekeeper®	32-DIP Module (0.600", 15.24mm)	Tube	Obsolete	Not Verified	Phantom Time Chip	Leap Year	-	HH:MM:SS:hh (12/24 hr)	YY-MM-DD-dd	Parallel	4.5V ~ 5.5V	-	5mA @ 4.5V ~ 5.5V	0°C ~ 70°C	Through Hole	-	-	32-PMDIP
M48T512V-85PM1 IC RTC CLOCK/CALENDAR PAR 32DIP STMicroelectronics	2,147	-	RFQ	Datasheet	Timekeeper®	32-DIP Module (0.600", 15.24mm)	Tube	Obsolete	Not Verified	Clock/Calendar	Leap Year	-	HH:MM:SS (24 hr)	YY-MM-DD-dd	Parallel	3V ~ 3.6V	-	3mA @ 3V ~ 3.6V	0°C ~ 70°C	Through Hole	-	-	32-PMDIP Module
M48T512Y-70PM1 IC RTC CLOCK/CALENDAR PAR 32DIP STMicroelectronics	3,609	-	RFQ	Datasheet	Timekeeper®	32-DIP Module (0.600", 15.24mm)	Tube	Obsolete	Not Verified	Clock/Calendar	Leap Year	-	HH:MM:SS (24 hr)	YY-MM-DD-dd	Parallel	4.5V ~ 5.5V	-	4mA @ 4.5V ~ 5.5V	0°C ~ 70°C	Through Hole	-	-	32-PMDIP Module

WINSUN SOURCING SUPPORT

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Send the target part number, manufacturer, specifications and quantity. Winsun (HK) Electronics can assist with availability checks, quotation support, shortage sourcing and alternative-part options when appropriate.

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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.