Real Time Clocks

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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
ISL12022MIBZ-TR5421 IC RTC CLK/CALENDAR I2C 20SOIC Renesas Electronics Corporation	1,578	-	RFQ	Datasheet	-	20-SOIC (0.295", 7.50mm Width)	Tape & Reel (TR)	Active	Not Verified	Clock/Calendar	Alarm, Daylight Savings, Leap Year, SRAM	128B	HH:MM:SS (12/24 hr)	YY-MM-DD-dd	I2C, 2-Wire Serial	2.7V ~ 5.5V	1.8V ~ 5.5V	14µA ~ 15µA @ 3V ~ 5V	-40°C ~ 85°C	Surface Mount	-	-	20-SOIC
M41T00AUDD1F IC RTC CLK/CALENDAR I2C 16DFN STMicroelectronics	3,451	-	RFQ	Datasheet	-	16-VFDFN Exposed Pad	Tape & Reel (TR)	Active	Not Verified	Clock/Calendar	Audio, Leap Year, Trickle-Charger	-	HH:MM:SS (24 hr)	YY-MM-DD-dd	I2C, 2-Wire Serial	3V ~ 3.6V	1.7V ~ 3.6V	14.3mA @ 3V ~ 3.6V	0°C ~ 70°C	Surface Mount	-	-	16-DFN (5x4)
DS1302SN-16 IC RTC CLK/CALENDAR SER 16SOIC Analog Devices Inc./Maxim Integrated	3,522	-	RFQ	Datasheet	-	16-SOIC (0.295", 7.50mm Width)	Tube	Obsolete	Not Verified	Clock/Calendar	Leap Year, NVSRAM, Trickle-Charger	31B	HH:MM:SS (12/24 hr)	YY-MM-DD-dd	3-Wire Serial	2V ~ 5.5V	2V ~ 5.5V	0.3µA ~ 1µA @ 2V ~ 5V	-40°C ~ 85°C	Surface Mount	-	-	16-SOIC
RX-8035SA:AA PURE SN IC RTC TIME EVENT REC I2C 14SOP EPSON	2,256	-	RFQ	Datasheet	RX-8035SA	14-SOIC (0.197", 5.00mm Width)	Tube	Active	Not Verified	Time Event Recorder	Alarm	-	HH:MM:SS (12/24 hr)	YY-MM-DD-dd	I2C, 2-Wire Serial	2.4V ~ 5.5V	1V ~ 5.5V	2.5µA @ 3V	-40°C ~ 85°C	Surface Mount	-	-	14-SOP
DS1678S IC RTC TIME EVENT REC I2C 8SOIC Analog Devices Inc./Maxim Integrated	3,716	-	RFQ	Datasheet	-	8-SOIC (0.209", 5.30mm Width)	Tube	Obsolete	Not Verified	Time Event Recorder	Alarm, Leap Year, NVSRAM, Y2K	32B	HH:MM:SS (12/24 hr)	YY-MM-DD-dd	I2C, 2-Wire Serial	4.5V ~ 5.5V	2.6V ~ 3.5V	-	-40°C ~ 85°C	Surface Mount	-	-	8-SOIC
RTC-72423A:3 IC RTC CLK/CALENDAR PAR 24SOP EPSON	2,814	-	RFQ	Datasheet	-	24-SOIC (0.311", 7.90mm Width)	Tape & Reel (TR)	Obsolete	Not Verified	Clock/Calendar	Leap Year	-	HH:MM:SS (12/24 hr)	YY-MM-DD-dd	Parallel	4.5V ~ 5.5V	-	5µA ~ 10µA @ 2V ~ 5V	-40°C ~ 85°C	Surface Mount	-	-	24-SOP
RV-3049-C3-TA-QC-OPT A LINEAR IC EM Microelectronic	1,920	-	RFQ	Datasheet	-	-	Tape & Reel (TR)	Active	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-
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
X1227S8-2.7T1 IC RTC CLK/CALENDAR I2C 8SOIC Renesas Electronics Corporation	2,041	-	RFQ	Datasheet	-	8-SOIC (0.154", 3.90mm Width)	Tape & Reel (TR)	Obsolete	Not Verified	Clock/Calendar	Alarm, Leap Year, Supervisor, Watchdog Timer	-	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 ~ 5V	0°C ~ 70°C	Surface Mount	-	-	8-SOIC
X1227S8T1 IC RTC CLK/CALENDAR I2C 8SOIC Renesas Electronics Corporation	4,725	-	RFQ	Datasheet	-	8-SOIC (0.154", 3.90mm Width)	Tape & Reel (TR)	Obsolete	Not Verified	Clock/Calendar	Alarm, Leap Year, Supervisor, Watchdog Timer	-	HH:MM:SS (12/24 hr)	YY-MM-DD-dd	I2C, 2-Wire Serial	4.5V ~ 5.5V	1.8V ~ 5.5V	10µA ~ 20µA @ 2.7V ~ 5V	0°C ~ 70°C	Surface Mount	-	-	8-SOIC
X1227S8ZT1 IC RTC CLK/CALENDAR I2C 8SOIC Renesas Electronics Corporation	4,503	-	RFQ	Datasheet	-	8-SOIC (0.154", 3.90mm Width)	Tape & Reel (TR)	Obsolete	Not Verified	Clock/Calendar	Alarm, Leap Year, Supervisor, Watchdog Timer	-	HH:MM:SS (12/24 hr)	YY-MM-DD-dd	I2C, 2-Wire Serial	4.5V ~ 5.5V	1.8V ~ 5.5V	10µA ~ 20µA @ 2.7V ~ 5V	0°C ~ 70°C	Surface Mount	-	-	8-SOIC
X1288V14Z-2.7T1 IC RTC CLK/CALENDAR I2C 14TSSOP Renesas Electronics Corporation	3,340	-	RFQ	Datasheet	-	14-TSSOP (0.173", 4.40mm Width)	Tape & Reel (TR)	Obsolete	Not Verified	Clock/Calendar	Alarm, Leap Year, Supervisor, Watchdog Timer	-	HH:MM:SS:hh (12/24 hr)	YY-MM-DD-dd	I2C, 2-Wire Serial	2.7V ~ 5.5V	1.8V ~ 5.5V	10µA ~ 20µA @ 2.7V ~ 5V	0°C ~ 70°C	Surface Mount	-	-	14-TSSOP
X1288V14Z-2.7AT1 IC RTC CLK/CALENDAR I2C 14TSSOP Renesas Electronics Corporation	2,190	-	RFQ	Datasheet	-	14-TSSOP (0.173", 4.40mm Width)	Tape & Reel (TR)	Obsolete	Not Verified	Clock/Calendar	Alarm, Leap Year, Supervisor, Watchdog Timer	-	HH:MM:SS:hh (12/24 hr)	YY-MM-DD-dd	I2C, 2-Wire Serial	2.7V ~ 5.5V	1.8V ~ 5.5V	10µA ~ 20µA @ 2.7V ~ 5V	0°C ~ 70°C	Surface Mount	-	-	14-TSSOP
X1288V14Z-4.5AT1 IC RTC CLK/CALENDAR I2C 14TSSOP Renesas Electronics Corporation	3,930	-	RFQ	Datasheet	-	14-TSSOP (0.173", 4.40mm Width)	Tape & Reel (TR)	Obsolete	Not Verified	Clock/Calendar	Alarm, Leap Year, Supervisor, Watchdog Timer	-	HH:MM:SS:hh (12/24 hr)	YY-MM-DD-dd	I2C, 2-Wire Serial	4.5V ~ 5.5V	1.8V ~ 5.5V	10µA ~ 20µA @ 2.7V ~ 5V	0°C ~ 70°C	Surface Mount	-	-	14-TSSOP
X1288V14ZT1 IC RTC CLK/CALENDAR I2C 14TSSOP Renesas Electronics Corporation	4,083	-	RFQ	Datasheet	-	14-TSSOP (0.173", 4.40mm Width)	Tape & Reel (TR)	Obsolete	Not Verified	Clock/Calendar	Alarm, Leap Year, Supervisor, Watchdog Timer	-	HH:MM:SS:hh (12/24 hr)	YY-MM-DD-dd	I2C, 2-Wire Serial	4.5V ~ 5.5V	1.8V ~ 5.5V	10µA ~ 20µA @ 2.7V ~ 5V	0°C ~ 70°C	Surface Mount	-	-	14-TSSOP
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
BQ4802YPWR IC RTC CLK/CALENDAR PAR 28TSSOP Texas Instruments	4,870	-	RFQ	Datasheet	-	28-TSSOP (0.173", 4.40mm Width)	Tape & Reel (TR)	Obsolete	Not Verified	Clock/Calendar	Alarm, Daylight Savings, Leap Year, Supervisor, Watchdog Timer	-	HH:MM:SS (12/24 hr)	YY-MM-DD-dd	Parallel	4.5V ~ 5.5V	2.4V ~ 4V	1.5mA (Typ) @ 4.5 V ~ 5.5 V	0°C ~ 70°C	Surface Mount	-	-	28-TSSOP
BQ4802YPWRG4 IC RTC CLK/CALENDAR PAR 28TSSOP Texas Instruments	4,478	-	RFQ	Datasheet	-	28-TSSOP (0.173", 4.40mm Width)	Tape & Reel (TR)	Obsolete	Not Verified	Clock/Calendar	Alarm, Daylight Savings, Leap Year, Supervisor, Watchdog Timer	-	HH:MM:SS (12/24 hr)	YY-MM-DD-dd	Parallel	4.5V ~ 5.5V	2.4V ~ 4V	1.5mA (Typ) @ 4.5 V ~ 5.5 V	0°C ~ 70°C	Surface Mount	-	-	28-TSSOP
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
DS12885SN IC RTC CLK/CALENDAR PAR 24SOIC Analog Devices Inc./Maxim Integrated	3,478	-	RFQ	Datasheet	-	24-SOIC (0.295", 7.50mm Width)	Tube	Obsolete	Not Verified	Clock/Calendar	Alarm, Daylight Savings, Leap Year, NVSRAM, Square Wave Output	114B	HH:MM:SS (12/24 hr)	YY-MM-DD-dd	Parallel	4.5V ~ 5.5V	2.5V ~ 4V	15mA @ 4.5V ~ 5.5V	-40°C ~ 85°C	Surface Mount	-	-	24-SOIC

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Real Time Clocks FAQ

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

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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.

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

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