Real Time Clocks

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Mfr Part #	Quantity Available	Price	Series	Package	Product Status	DigiKey Programmable	Type	Features	Memory Size	Time Format	Date Format	Interface	Voltage - Supply	Voltage - Supply, Battery	Current - Timekeeping (Max)	Operating Temperature	Mounting Type	Package / Case	Supplier Device Package

R2025S-E2-FE IC RTC CLK/CALENDAR I2C 14SOP Nisshinbo Micro Devices Inc.	14,190 In Stock	1 : ¥37.77000 Cut Tape (CT) 1,000 : ¥19.96690 Tape & Reel (TR)	-	Tape & Reel (TR) Cut Tape (CT) Digi-Reel®	Active	Not Verified	Clock/Calendar	Alarm, Leap Year	-	HH:MM:SS (12/24 hr)	YY-MM-DD-dd	I2C, 2-Wire Serial	1.7V ~ 5.5V	-	120µA ~ 1.8µA @ 3V ~ 5V	-40°C ~ 85°C	Surface Mount	14-SOIC (0.197", 5.00mm Width)	14-SOP
DS1308U-33+T IC RTC CLOCK/CALENDAR I2C 8UMAX Analog Devices Inc./Maxim Integrated	7,290 In Stock	1 : ¥40.88000 Cut Tape (CT) 3,000 : ¥20.50886 Tape & Reel (TR)	-	Tape & Reel (TR) Cut Tape (CT) Digi-Reel®	Active	Not Verified	Clock/Calendar	Leap Year, NVSRAM, Square Wave Output	56B	HH:MM:SS (12/24 hr)	YY-MM-DD-dd	I2C, 2-Wire Serial	3V ~ 5.5V	1.3V ~ 5.5V	125µA ~ 200µA @ 3V ~ 5.5V	-40°C ~ 85°C	Surface Mount	8-TSSOP, 8-MSOP (0.118", 3.00mm Width)	8-uMAX/uSOP
RX-4045SAAA3 PURE SN IC RTC CLK/CALENDAR SPI 14SOP EPSON	3,913 In Stock	1 : ¥56.32000 Cut Tape (CT) 250 : ¥41.66476 Tape & Reel (TR)	RX-4045SA	Tape & Reel (TR) Cut Tape (CT) Digi-Reel®	Active	Not Verified	Clock/Calendar	Alarm	-	HH:MM:SS (12/24 hr)	YY-MM-DD-dd	SPI	1.7V ~ 5.5V	-	1.2µA ~ 1.8µA @ 3V ~ 5V	-40°C ~ 85°C	Surface Mount	14-SOIC (0.197", 5.00mm Width)	14-SOP
RX-4571SA:B3 PURE SN IC RTC CLK/CALENDAR SER 14SOP EPSON	648 In Stock	1 : ¥30.29000 Cut Tape (CT) 250 : ¥21.16916 Tape & Reel (TR)	RX-4571SA	Tape & Reel (TR) Cut Tape (CT) Digi-Reel®	Active	Not Verified	Clock/Calendar	Alarm, Leap Year	-	HH:MM:SS (24 hr)	YY-MM-DD-dd	3-Wire Serial	1.6V ~ 5.5V	-	0.95µA ~ 1µA @ 3V ~ 5V	-40°C ~ 85°C	Surface Mount	14-SOIC (0.209", 5.30mm Width)	14-SOP
RX8900SA:UC3 PURE SN IC RTC CLK/CALENDAR I2C 14SOP EPSON	2,997 In Stock	1 : ¥49.34000 Cut Tape (CT) 250 : ¥35.24044 Tape & Reel (TR)	RX8900SA	Tape & Reel (TR) Cut Tape (CT) Digi-Reel®	Active	Not Verified	Clock/Calendar	Alarm	-	HH:MM:SS (24 hr)	YY-MM-DD-dd	I2C	2.5V ~ 5.5V	1.6V ~ 5.5V	1.4µA ~ 1.5µA @ 3V ~ 5V	-40°C ~ 85°C	Surface Mount	14-SOIC (0.197", 5.00mm Width)	14-SOP
RX-8803SA:UB3 PURE SN IC RTC CLK/CALENDAR I2C 14SOP EPSON	246 In Stock	1 : ¥38.67000 Cut Tape (CT) 250 : ¥26.99844 Tape & Reel (TR)	RX-8803LC	Tape & Reel (TR) Cut Tape (CT) Digi-Reel®	Active	Not Verified	Clock/Calendar	Alarm	-	-	YY-MM-DD	I2C, 2-Wire Serial	1.6V ~ 5.5V	-	2.1µA ~ 3.4µA @ 3V ~ 5V	-40°C ~ 85°C	Surface Mount	14-SOIC (0.197", 5.00mm Width)	14-SOP
RX8900SA:UB3 PURE SN IC RTC CLK/CALENDAR I2C 14SOP EPSON	495 In Stock	1 : ¥49.34000 Cut Tape (CT) 250 : ¥35.24044 Tape & Reel (TR)	RX8900SA	Tape & Reel (TR) Cut Tape (CT) Digi-Reel®	Active	Not Verified	Clock/Calendar	Alarm	-	HH:MM:SS (24 hr)	YY-MM-DD-dd	I2C	2.5V ~ 5.5V	1.6V ~ 5.5V	1.4µA ~ 1.5µA @ 3V ~ 5V	-40°C ~ 85°C	Surface Mount	14-SOIC (0.197", 5.00mm Width)	14-SOP

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Real Time Clocks

Real Time Clocks (RTCs) provide time and/or date information in almost any electronic device which needs to keep accurate time. The clock types are binary counter, clock/calendar/supervisor, elapsed time counter, phantom time chip, portable system controller, temperature recorder, time event recorder, and timer clock peripheral. They contain memory sizes ranging from 2 B to 2 MB and have interface options of I2C, Parallel, Serial, SPI, 1-Wire, 2-Wire, 3-Wire, and 4-Wire.