Real Time Clocks

Browse available Real Time Clocks part numbers with manufacturer references, stock information, pricing, datasheets and key specifications. Use the table below to compare options for your project.

For BOM, shortage or hard-to-find requirements, send your part number and quantity to Winsun (HK) Electronics for availability, lead-time and quotation support.

Compare Part Numbers Review available models and manufacturers

Datasheets & Specifications Access technical references quickly

RFQ & BOM Support Send quantities for sourcing and quotation

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
DS1251Y-150 4096K NV SRAM & PHANTOM CLOCK Analog Devices Inc./Maxim Integrated	213	-	RFQ	Datasheet	-	32-DIP Module (0.600", 15.24mm)	Bulk	Active	Not Verified	Phantom Time Chip	EEPROM, Leap Year, NVSRAM, RAM	512KB	HH:MM:SS:hh (12/24 hr)	YY-MM-DD	Parallel	2.97V ~ 3.63V, 4.5V ~ 5.5V	Integrated	10mA @ 5V	0°C ~ 70°C (TA)	Through Hole	-	-	32-EDIP
DS1248W-120+ IC RTC PHANTOM PAR 32-DIP Analog Devices Inc./Maxim Integrated	770	-	RFQ	Datasheet	-	32-DIP Module (0.600", 15.24mm)	Bulk	Obsolete	Not Verified	Phantom Time Chip	NVSRAM	128KB	HH:MM:SS:hh (12/24 hr)	YY-MM-DD-dd	Parallel	2.97V ~ 3.63V	-	7mA @ 3.3V	0°C ~ 70°C	Through Hole	-	-	32-EDIP
DS1747P-70 IC RTC CLK/CALENDAR PAR 34PCM Analog Devices Inc./Maxim Integrated	1,253	-	RFQ	Datasheet	-	34-PowerCap™ Module	Tube	Obsolete	Not Verified	Clock/Calendar	Leap Year, NVSRAM, Y2K	512KB	HH:MM:SS (24 hr)	YY-MM-DD-dd	Parallel	4.5V ~ 5.5V	3V	4mA @ 5V	0°C ~ 70°C	Surface Mount	-	-	34-PowerCap Module
DS1315SN-5 IC RTC PHANTOM CHIP PAR 16SOIC Analog Devices Inc./Maxim Integrated	2,783	-	RFQ	Datasheet	-	16-SOIC (0.295", 7.50mm Width)	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	2.5V ~ 3.7V	1.3mA @ 5V	-40°C ~ 85°C	Surface Mount	-	-	16-SOIC
DS1248WP-120 IC RTC PHANTOM CHIP PAR 34PCM Analog Devices Inc./Maxim Integrated	1,154	-	RFQ	Datasheet	-	34-PowerCap™ Module	Tube	Obsolete	Not Verified	Phantom Time Chip	NVSRAM	128KB	HH:MM:SS:hh (12/24 hr)	YY-MM-DD-dd	Parallel	2.97V ~ 3.63V	3V	7mA @ 3.3V	0°C ~ 70°C	Surface Mount	-	-	34-PowerCap Module
DS1646-120 IC RTC CLK/CALENDAR PAR 32EDIP Analog Devices Inc./Maxim Integrated	4,423	-	RFQ	Datasheet	-	32-DIP Module (0.600", 15.24mm)	Tube	Obsolete	Not Verified	Clock/Calendar	Leap Year, NVSRAM	128KB	HH:MM:SS (24 hr)	YY-MM-DD-dd	Parallel	4.5V ~ 5.5V	3V	4mA @ 4.5 V ~ 5.5 V	0°C ~ 70°C	Through Hole	-	-	32-EDIP
CDP68HC68T1EZ IC RTC CLK/CALENDAR SPI 16DIP Renesas Electronics Corporation	1,427	-	RFQ	Datasheet	-	16-DIP (0.300", 7.62mm)	Tube	Obsolete	Not Verified	Clock/Calendar	Alarm, Leap Year, Square Wave Output, Watchdog Timer	32B	HH:MM:SS (12/24 hr)	YY-MM-DD-dd	SPI	3V ~ 6V	2.2V ~ 6V	20µA ~ 500µA @ 5V	-40°C ~ 85°C	Through Hole	-	-	16-PDIP
DS1251WP-120 IC RTC PHANTOM CHIP PAR 34PCM Analog Devices Inc./Maxim Integrated	1,654	-	RFQ	Datasheet	-	34-PowerCap™ Module	Tube	Obsolete	Not Verified	Phantom Time Chip	Leap Year, NVSRAM	512KB	HH:MM:SS:hh (12/24 hr)	YY-MM-DD-dd	Parallel	2.97V ~ 3.63V	3V	7mA @ 3.3V	0°C ~ 70°C	Surface Mount	-	-	34-PowerCap Module
DS1251YP-70 IC RTC PHANTOM CHIP PAR 34PCM Analog Devices Inc./Maxim Integrated	320	-	RFQ	Datasheet	-	34-PowerCap™ Module	Tube	Obsolete	Not Verified	Phantom Time Chip	Leap Year, NVSRAM	512KB	HH:MM:SS:hh (12/24 hr)	YY-MM-DD-dd	Parallel	4.5V ~ 5.5V	3V	10mA @ 5V	0°C ~ 70°C	Surface Mount	-	-	34-PowerCap Module
DS1644L-120 DS1644 NV TIMEKEEPING RAM Analog Devices Inc./Maxim Integrated	769	-	RFQ	Datasheet	-	28-DIP Module (0.600", 15.24mm)	Bulk	Active	Not Verified	Clock/Calendar	EEPROM, Leap Year, NVSRAM, RAM	32KB	HH:MM:SS (24 hr)	YY-MM-DD	-	4.5V ~ 5.5V	-	4mA @ 5V	0°C ~ 70°C	Through Hole	-	-	28-EDIP
BQ4832YMA-85 IC RTC CLK/CALENDAR PAR 32DIP Texas Instruments	1,999	-	RFQ	Datasheet	-	32-DIP Module (0.610", 15.49mm)	Tube	Obsolete	Not Verified	Clock/Calendar	Alarm, Supervisor, Watchdog Timer	-	HH:MM:SS:hh (24 hr)	YY-MM-DD-dd	Parallel	4.5V ~ 5.5V	-	4mA @ 4.5 V ~ 5.5 V	0°C ~ 70°C	Through Hole	-	-	32-DIP Module (18.42x42.8)
BQ4852YMC-85 IC RTC CLK/CALENDAR PAR 36DIP Benchmarq	1,000	-	RFQ	Datasheet	-	36-DIP Module (0.610", 15.49mm)	Tube	Obsolete	Not Verified	Clock/Calendar	Alarm, Supervisor, Watchdog Timer	-	HH:MM:SS:hh (24 hr)	YY-MM-DD-dd	Parallel	4.5V ~ 5.5V	-	1mA @ 4.5V ~ 5.5V	0°C ~ 70°C	Through Hole	-	-	36-DIP Module (18.42x52.96)
BQ4852YMC-85 IC RTC CLK/CALENDAR PAR 36DIP Texas Instruments	4,037	-	RFQ	Datasheet	-	36-DIP Module (0.610", 15.49mm)	Tube	Obsolete	Not Verified	Clock/Calendar	Alarm, Supervisor, Watchdog Timer	-	HH:MM:SS:hh (24 hr)	YY-MM-DD-dd	Parallel	4.5V ~ 5.5V	-	1mA @ 4.5V ~ 5.5V	0°C ~ 70°C	Through Hole	-	-	36-DIP Module
DS1557WP-120IND IC RTC CLK/CALENDAR PAR 34PCM Analog Devices Inc./Maxim Integrated	1,186	-	RFQ	Datasheet	-	34-PowerCap™ Module	Tube	Obsolete	Not Verified	Clock/Calendar	Alarm, Leap Year, NVSRAM, Watchdog Timer, Y2K	512KB	HH:MM:SS (24 hr)	YY-MM-DD-dd	Parallel	2.97V ~ 3.63V	3V	4mA @ 3.3V	-40°C ~ 85°C	Surface Mount	-	-	34-PowerCap Module
DS1557WP-120 IC RTC CLK/CALENDAR PAR 34PCM Analog Devices Inc./Maxim Integrated	4,819	-	RFQ	Datasheet	-	34-PowerCap™ Module	Tube	Obsolete	Not Verified	Clock/Calendar	Alarm, Leap Year, NVSRAM, Watchdog Timer, Y2K	512KB	HH:MM:SS (24 hr)	YY-MM-DD-dd	Parallel	2.97V ~ 3.63V	3V	4mA @ 3.3V	0°C ~ 70°C	Surface Mount	-	-	34-PowerCap Module
BQ4850YMA-85N IC RTC CLK/CALENDAR PAR 32DIP Texas Instruments	3,539	-	RFQ	Datasheet	-	32-DIP Module (0.61", 15.49mm)	Tube	Obsolete	Not Verified	Clock/Calendar	Alarm	-	HH:MM:SS (24 hr)	YY-MM-DD-dd	Parallel	4.5V ~ 5.5V	-	1mA @ 4.5V ~ 5.5V	-40°C ~ 85°C	Through Hole	-	-	32-DIP Module (18.42x52.96)
DS1670S+ IC RTC SYST CTRLR SER 20SOIC Analog Devices Inc./Maxim Integrated	2,239	-	RFQ	Datasheet	-	20-SOIC (0.295", 7.50mm Width)	Tube	Obsolete	Not Verified	Portable System Controller	Alarm, Leap Year, Watchdog Timer	-	HH:MM:SS (12/24 hr)	YY-MM-DD-dd	3-Wire Serial	2.97V ~ 3.63V	2.5V ~ 3.7V	100µA @ 3.3V	0°C ~ 70°C	Surface Mount	-	-	20-SOIC
DS1673S-5+ IC RTC SYST CTRLR SER 20SOIC Analog Devices Inc./Maxim Integrated	3,578	-	RFQ	Datasheet	-	20-SOIC (0.295", 7.50mm Width)	Tube	Obsolete	Not Verified	Portable System Controller	Alarm, Leap Year, Watchdog Timer	-	HH:MM:SS (12/24 hr)	YY-MM-DD-dd	3-Wire Serial	4.5V ~ 5.5V	2.5V ~ 3.7V	300µA @ 5V	0°C ~ 70°C	Surface Mount	-	-	20-SOIC
ISL12024IRTCZ REAL-TIME CLOCK/CALENDAR WITH EM Intersil	656	-	RFQ	Datasheet	-	8-WDFN Exposed Pad	Bulk	Active	Not Verified	Clock/Calendar	Alarm, Leap Year, Unique ID	-	HH:MM:SS (12/24 hr)	YY-MM-DD-dd	I2C, 2-Wire Serial	2.7V ~ 5.5V	1.8V ~ 5.5V	10µA ~ 20µA @ 2.7V ~ 5.5V	-40°C ~ 85°C	Surface Mount	-	-	8-TDFN (3x3)
ISL12024IRTCZ REAL-TIME CLOCK/CALENDAR WITH EM Renesas Electronics Corporation	190	-	RFQ	Datasheet	-	8-WDFN Exposed Pad	Bulk	Active	Not Verified	Clock/Calendar	Alarm, Leap Year, Unique ID	-	HH:MM:SS (12/24 hr)	YY-MM-DD-dd	I2C, 2-Wire Serial	2.7V ~ 5.5V	1.8V ~ 5.5V	10µA ~ 20µA @ 2.7V ~ 5.5V	-40°C ~ 85°C	Surface Mount	-	-	8-TDFN (3x3)

WINSUN SOURCING SUPPORT

Need Real Time Clocks Sourcing Support?

Send the manufacturer, part number, quantity and target delivery requirement. Winsun (HK) Electronics can assist with availability checks, quotation support, shortage sourcing and hard-to-find or obsolete components.

Global component sourcing support BOM, shortage and EOL support

Send part number & quantity Request a Quote

Need sourcing assistance? Contact Sales

FREQUENTLY ASKED QUESTIONS

Real Time Clocks FAQ

Common questions about selecting, comparing and sourcing Real Time Clocks components through Winsun (HK) Electronics.

What should I check when selecting Real Time Clocks components?

Compare the manufacturer part number, electrical specifications, package, operating conditions and application requirements. The product datasheet should be used to confirm technical suitability.

Can Winsun help source specific Real Time Clocks part numbers?

Yes. Send the exact part number, manufacturer and required quantity. Winsun (HK) Electronics can assist with availability checks, quotation support and sourcing options based on your requirement.

Do you support shortage, obsolete or hard-to-find Real Time Clocks parts?

Yes. Our sourcing team can review shortage and obsolete-part requirements and help check available supply channels or possible alternatives when appropriate.

How do I request a quote for Real Time Clocks components?

Submit an RFQ with the part number, manufacturer, quantity and target delivery requirement. Our sales team will review your request and follow up with current sourcing information.