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

RV-3028-C7 32.768KHZ 1PPM-TA-QA IC RTC CLK/CALENDAR I2C 8SON Micro Crystal AG	67,888 In Stock	1 : $3.06000 Cut Tape (CT) 1,000 : $1.61620 Tape & Reel (TR)	Automotive, AEC-Q200	Tape & Reel (TR) Cut Tape (CT) Digi-Reel®	Active	Not Verified	Clock/Calendar	Alarm, Battery Switch, EEPROM, External Event Interrupt, Leap Year, Programmable Clock Output, RAM, Timer, Trickle Charger	2B, 43B	HH:MM:SS (12/24 hr)	YY-MM-DD-dd	I²C, 2-Wire Serial	1.1V ~ 5.5V	1.1V ~ 5.5V	0.06µA @ 3V	-40°C ~ 85°C (TA)	Surface Mount	8-WCDFN	8-SON (3.2x1.5)
RV-8803-C7-32.768KHZ-3PPM-TA-QA IC RTC CLK/CALENDAR I2C 8SON Micro Crystal AG	27,135 In Stock	1 : $3.65000 Cut Tape (CT) 1,000 : $1.93011 Tape & Reel (TR)	Automotive, AEC-Q200	Tape & Reel (TR) Cut Tape (CT) Digi-Reel®	Active	Not Verified	Clock/Calendar	Alarm, External Event Interrupt, Leap Year, Programmable Clock Output, RAM, Timer	1B	HH:MM:SS (24 hr)	YY-MM-DD-dd	I²C, 2-Wire Serial	1.5V ~ 5.5V	-	0.35µA @ 3V	-40°C ~ 85°C (TA)	Surface Mount	8-WCDFN	8-SON (3.2x1.5)
RV-3032-C7-32.768KHZ-2.5PPM-TA-QA IC RTC TEMPERAT CLK/CAL I2C 8SON Micro Crystal AG	7,759 In Stock	1 : $4.48000 Cut Tape (CT) 1,000 : $2.36562 Tape & Reel (TR)	Automotive, AEC-Q200	Tape & Reel (TR) Cut Tape (CT) Digi-Reel®	Active	Not Verified	Clock/Calendar	Alarm, Battery Switch, Clock Output Hz-MHz, Event Input, Temperature Alarm, Timer, Trickle Charge with Charge Pump	16B, 32B	HH:MM:SS:100th (24 hr)	YY-MM-DD-dd	I²C, 2-Wire Serial	1.3V ~ 5.5V	-	210nA @ 3V	-40°C ~ 105°C (TA)	Surface Mount	8-WCDFN	8-SON (3.2x1.5)
RV-3149-C3-32.768KHZ-OPTION-A-TB-QA IC RTC CLK/CALENDAR SPI 10SON Micro Crystal AG	11,384 In Stock	1 : $5.17000 Cut Tape (CT) 1,000 : $2.73326 Tape & Reel (TR)	Automotive, AEC-Q200	Tape & Reel (TR) Cut Tape (CT) Digi-Reel®	Active	Not Verified	Clock/Calendar	Alarm, EEPROM, Leap Year, Programmable Clock Output, RAM, Temperature, Timer, Trickle Charger	2B, 8B	HH:MM:SS (12/24 hr)	YY-MM-DD-dd	SPI, 4-Wire Serial	1.3V ~ 5.5V	-	1µA @ 3V	-40°C ~ 125°C (TA)	Surface Mount	10-VCDFN	10-SON (3.7x2.5)
RV-3129-C3-32.768KHZ-OPTION-A-TB-QA IC RTC CLK/CALENDAR I2C 10SON Micro Crystal AG	7,551 In Stock	1 : $5.17000 Cut Tape (CT) 1,000 : $2.73326 Tape & Reel (TR)	Automotive, AEC-Q200	Tape & Reel (TR) Cut Tape (CT) Digi-Reel®	Active	Not Verified	Clock/Calendar	Alarm, EEPROM, Leap Year, Programmable Clock Output, RAM, Temperature, Timer, Trickle Charger	2B, 8B	HH:MM:SS (12/24 hr)	YY-MM-DD-dd	I²C, 2-Wire Serial	1.3V ~ 5.5V	-	1µA @ 3V	-40°C ~ 125°C (TA)	Surface Mount	10-VCDFN	10-SON (3.7x2.5)
RV-3129-C3-32.768KHZ-OPTION-B-TB-QA IC RTC CLK/CALENDAR I2C 10SON Micro Crystal AG	23,490 In Stock	1 : $4.31000 Cut Tape (CT) 1,000 : $2.27795 Tape & Reel (TR)	Automotive, AEC-Q200	Tape & Reel (TR) Cut Tape (CT) Digi-Reel®	Active	Not Verified	Clock/Calendar	Alarm, EEPROM, Leap Year, Programmable Clock Output, RAM, Temperature, Timer, Trickle Charger	2B, 8B	HH:MM:SS (12/24 hr)	YY-MM-DD-dd	I²C, 2-Wire Serial	1.3V ~ 5.5V	-	1µA @ 3V	-40°C ~ 125°C (TA)	Surface Mount	10-VCDFN	10-SON (3.7x2.5)
RV-8263-C7-32.768KHZ-20PPM-TA-QA IC RTC CLK/CALENDAR I2C 8SON Micro Crystal AG	5,178 In Stock	1 : $1.71000 Cut Tape (CT) 1,000 : $0.84062 Tape & Reel (TR)	Automotive, AEC-Q200	Tape & Reel (TR) Cut Tape (CT) Digi-Reel®	Active	Not Verified	Clock/Calendar	Alarm, Leap Year, Programmable Clock Output, RAM, Timer	1B	HH:MM:SS (12/24 hr)	YY-MM-DD-dd	I²C, 2-Wire Serial	0.9V ~ 5.5V	-	0.24µA @ 3V	-40°C ~ 85°C (TA)	Surface Mount	8-WCDFN	8-SON (3.2x1.5)
RV-3149-C3-32.768KHZ-OPTION-B-TB-QA IC RTC CLK/CALENDAR SPI 10SON Micro Crystal AG	1,323 In Stock	1 : $4.31000 Cut Tape (CT) 1,000 : $2.27795 Tape & Reel (TR)	Automotive, AEC-Q200	Tape & Reel (TR) Cut Tape (CT) Digi-Reel®	Active	Not Verified	Clock/Calendar	Alarm, EEPROM, Leap Year, Programmable Clock Output, RAM, Temperature, Timer, Trickle Charger	2B, 8B	HH:MM:SS (12/24 hr)	YY-MM-DD-dd	SPI, 4-Wire Serial	1.3V ~ 5.5V	-	1µA @ 3V	-40°C ~ 125°C (TA)	Surface Mount	10-VCDFN	10-SON (3.7x2.5)
RV-4162-C7-32.768KHZ-20PPM-TA-QA IC RTC CLK/CALENDAR I2C 8SON Micro Crystal AG	0 In Stock Check Lead Time	1,000 : $1.35027 Tape & Reel (TR)	Automotive, AEC-Q200	Tape & Reel (TR)	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)
RV-1805-C3-32.768KHZ-2PPM-TA-QA IC RTC CLK/CALENDAR I2C 10SON Micro Crystal AG	0 In Stock	1,000 : $1.68775 Tape & Reel (TR)	Automotive, AEC-Q200	Tape & Reel (TR)	Not For New Designs	Not Verified	Clock/Calendar	Alarm, Programmable Clock Output, RAM, Timer, Trickle Charger, Watchdog Timer	256B	HH:MM:SS:hh (12/24 hr)	YY-MM-DD-dd	I²C, 2-Wire Serial	1.5V ~ 3.6V	-	0.08µA @ 3V	-40°C ~ 85°C (TA)	Surface Mount	10-VCDFN	10-SON (3.7x2.5)
RA-4565SA:B3 ROHS IC RTC CLK/CALENDAR SER 14SOP EPSON	0 In Stock	Obsolete	Automotive, AEC-Q200	Tape & Reel (TR) Cut Tape (CT) Digi-Reel®	Obsolete	Not Verified	Clock/Calendar	Alarm, Leap Year	-	HH:MM:SS (24 hr)	YY-MM-DD-dd	4-Wire Serial	1.6V ~ 5.5V	-	1.6µA ~ 2µA @ 3V ~ 5V	-40°C ~ 125°C	Surface Mount	14-SOIC (0.209", 5.30mm Width)	14-SOP
RA-4574SA:B3 ROHS IC RTC CLK/CALENDAR SER 14SOP EPSON	0 In Stock	Obsolete	Automotive, AEC-Q200	Tape & Reel (TR) Cut Tape (CT) Digi-Reel®	Obsolete	Not Verified	Clock/Calendar	Alarm, Leap Year	-	HH:MM:SS (24 hr)	YY-MM-DD-dd	3-Wire Serial	1.6V ~ 5.5V	-	1µA ~ 2µA @ 3V ~ 5V	-40°C ~ 85°C	Surface Mount	14-SOIC (0.209", 5.30mm Width)	14-SOP
RA-4565SA B3 PURE SN IC RTC CLK/CALENDAR SPI 14SOP EPSON	0 In Stock	Obsolete	Automotive, AEC-Q200	Tape & Reel (TR)	Obsolete	Not Verified	Clock/Calendar	Alarm, Leap Year	-	HH:MM:SS	YY-MM-DD-dd	SPI, 4-Wire Serial	1.6V ~ 5.5V	-	1.6µA ~ 2µA @ 3V ~ 5V	-40°C ~ 125°C	Surface Mount	14-SOIC (0.197", 5.00mm Width)	14-SOP
RA8900CE UB3 IC RTC CLK/CALENDAR I2C 10SMD EPSON	0 In Stock	Active	Automotive, AEC-Q200	Tape & Reel (TR)	Active	Not Verified	Clock/Calendar	Alarm	-	HH:MM:SS	YY-MM-DD-dd	I²C	2.5V ~ 5.5V	-	1.4µA ~ 1.5µA @ 3V ~ 5V	-40°C ~ 85°C (TA)	Surface Mount	10-SMD, No Lead	10-SMD
RA8804CE XB3 IC RTC CLK/CALENDAR I2C 10SMD EPSON	0 In Stock	Active	Automotive, AEC-Q200	Tape & Reel (TR)	Active	Not Verified	Clock/Calendar	Alarm	-	HH:MM:SS	YY-MM-DD-dd	I²C	1.6V ~ 5.5V	-	1.5µA ~ 1.6µA @ 3V ~ 5V	-40°C ~ 105°C (TA)	Surface Mount	10-SMD, No Lead	10-SMD

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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.

Real Time Clocks

Real Time Clocks

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