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	Grade	Qualification	Package / Case	Supplier Device Package

MCP7940MT-I/SN IC RTC CLK/CALENDAR I2C 8SOIC Microchip Technology	4,696 In Stock	1 : ¥5.70000 Cut Tape (CT) 3,300 : ¥5.01572 Tape & Reel (TR)	-	Tape & Reel (TR) Cut Tape (CT) Digi-Reel®	Active	Not Verified	Clock/Calendar	Alarm, Leap Year, Square Wave Output, SRAM	64B	HH:MM:SS (12/24 hr)	YY-MM-DD-dd	I2C, 2-Wire Serial	1.8V ~ 5.5V	-	1µA @ 5.5V	-40°C ~ 85°C	Surface Mount	-	-	8-SOIC (0.154", 3.90mm Width)	8-SOIC
MCP7940N-I/SN IC RTC CLK/CALENDAR I2C 8SOIC Microchip Technology	4,371 In Stock	100 : ¥6.46090 Tube	-	Tube	Active	Not Verified	Clock/Calendar	Alarm, Leap Year, Square Wave Output, SRAM	64B	HH:MM:SS (12/24 hr)	YY-MM-DD-dd	I2C, 2-Wire Serial	1.8V ~ 5.5V	1.3V ~ 5.5V	1.2µA @ 3.3V	-40°C ~ 85°C	Surface Mount	Automotive	AEC-Q100	8-SOIC (0.154", 3.90mm Width)	8-SOIC
MCP7940NT-I/SN IC RTC CLK/CALENDAR I2C 8SOIC Microchip Technology	26,347 In Stock	1 : ¥7.23000 Cut Tape (CT) 3,300 : ¥6.46095 Tape & Reel (TR)	-	Tape & Reel (TR) Cut Tape (CT) Digi-Reel®	Active	Not Verified	Clock/Calendar	Alarm, Leap Year, Square Wave Output, SRAM	64B	HH:MM:SS (12/24 hr)	YY-MM-DD-dd	I2C, 2-Wire Serial	1.8V ~ 5.5V	1.3V ~ 5.5V	1.2µA @ 3.3V	-40°C ~ 85°C	Surface Mount	Automotive	AEC-Q100	8-SOIC (0.154", 3.90mm Width)	8-SOIC
MCP79410T-I/SN IC RTC CLK/CALENDAR I2C 8SOIC Microchip Technology	7,337 In Stock	1 : ¥8.84000 Cut Tape (CT) 3,300 : ¥7.73611 Tape & Reel (TR)	-	Tape & Reel (TR) Cut Tape (CT) Digi-Reel®	Active	Not Verified	Clock/Calendar	Alarm, Leap Year, Square Wave Output, SRAM, Unique ID	64B, 1Kb	HH:MM:SS (12/24 hr)	YY-MM-DD-dd	I2C, 2-Wire Serial	1.8V ~ 5.5V	1.3V ~ 5.5V	1.2µA @ 3.3V	-40°C ~ 85°C	Surface Mount	-	-	8-SOIC (0.154", 3.90mm Width)	8-SOIC
PCF8523TK/1,118 IC RTC CLK/CALENDAR I2C 8HVSON NXP USA Inc.	1,396 In Stock	1 : ¥15.11000 Cut Tape (CT) 6,000 : ¥6.64878 Tape & Reel (TR)	-	Tape & Reel (TR) Cut Tape (CT) Digi-Reel®	Active	Not Verified	Clock/Calendar	Alarm, Leap Year, Watchdog Timer	-	HH:MM:SS (12/24 hr)	YY-MM-DD-dd	I2C, 2-Wire Serial	1.6V ~ 5.5V	1.8V ~ 5.5V	0.5µA @ 2V ~ 5V	-40°C ~ 85°C	Surface Mount	-	-	8-VDFN Exposed Pad	8-HVSON (4x4)
RV-4162-C7-32.768KHZ-20PPM-TA-QC IC RTC CLK/CALENDAR I2C 8SON Micro Crystal AG	12,603 In Stock	1 : ¥22.27000 Cut Tape (CT) 1,000 : ¥10.93112 Tape & Reel (TR)	C7	Tape & Reel (TR) Cut Tape (CT) Digi-Reel®	Active	Not Verified	Clock/Calendar	Alarm, Leap Year, Programmable Clock Output, Watchdog Timer	-	HH:MM:SS:hh (24 hr)	YY-MM-DD-dd	I2C, 2-Wire Serial	1V ~ 4.4V	-	0.5µA @ 3V	-40°C ~ 85°C (TA)	Surface Mount	-	-	8-WCDFN	8-SON (3.2x1.5)
DS1307+ IC RTC CLOCK/CALENDAR I2C 8DIP Analog Devices Inc./Maxim Integrated	6,407 In Stock 3,350 Factory	1 : ¥45.82000 Tube	-	Tube	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	4.5V ~ 5.5V	2V ~ 3.5V	200µA @ 5V	0°C ~ 70°C	Through Hole	-	-	8-DIP (0.300", 7.62mm)	8-PDIP
S-35390A-I8T1U IC RTC CLK/CALENDAR I2C SNT8A ABLIC Inc.	15,550 In Stock	1 : ¥9.27000 Cut Tape (CT) 5,000 : ¥5.53642 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	1.3V ~ 5.5V	-	0.93µA ~ 1.1µA @ 3V ~ 5V	-40°C ~ 85°C	Surface Mount	-	-	8-SMD, Flat Leads	SNT-8A
PCF85063AT/AY PCF85063AT - Tiny Real-Time Cloc NXP Semiconductors	68,624 Marketplace	Unavailable Unavailable in your selected currency	-	Bulk	Active	-	Clock/Calendar	Alarm, Leap Year, Square Wave Output	-	HH:MM:SS (12/24 hr)	YY-MM-DD-dd	I2C	0.9V ~ 5.5V, 1.8V ~ 5.5V	-	0.6µA @ 3.3V	-40°C ~ 85°C (TA)	Surface Mount	-	-	8-SOIC (0.154", 3.90mm Width)	8-SOIC
DS1375T 2-WIRE DIGITAL INPUT RTC Analog Devices Inc./Maxim Integrated	3,797 Marketplace	Unavailable Unavailable in your selected currency	-	Tube	Active	Not Verified	Clock/Calendar	Alarm, Leap Year, Square Wave Output, SRAM	16B	HH:MM:SS (12/24 hr)	YY-MM-DD-dd	I2C	1.7V ~ 5.5V	1.3V ~ 5.5V	0.5µA @ 1.7V ~ 5.5V	-40°C ~ 85°C (TA)	Surface Mount	-	-	6-WDFN Exposed Pad	6-TDFN-EP (3x3)
M41T62LC6F IC RTC CLK/CALENDAR I2C 8LCC STMicroelectronics	0 In Stock	1 : ¥51.72000 Cut Tape (CT) 1,000 : ¥27.33495 Tape & Reel (TR)	Timekeeper®	Tape & Reel (TR) Cut Tape (CT) Digi-Reel®	Obsolete	Not Verified	Clock/Calendar	Alarm, Leap Year, Square Wave Output, Watchdog Timer	-	HH:MM:SS:hh (24 hr)	YY-MM-DD-dd	I2C, 2-Wire Serial	1.3V ~ 4.4V	-	0.7µA ~ 0.95µA @ 1.3V ~ 4.4V	-40°C ~ 85°C	Surface Mount	-	-	8-LCC	8-LCC (1.5x3.2)

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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.