Clock/Timing - Real Time Clocks

Category Introduction

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.

Product List

2231 Items

PDF	Mfr Part #	Quantity Available	UnitPrice	RFQ	Series	Packaging	Product Status	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
	DS1344D-18+T&R IC RTC CLK/CAL SPI 14TDFN Analog Devices Inc./Maxim Integrated	46	$5.56			Tape & Reel (TR)	Active	Clock/Calendar	Alarm, Leap Year, NVRAM, Square Wave Output, Trickle Charger	96B	HH:MM:SS (12/24 hr)	YY-MM-DD-dd	SPI	1.71V ~ 5.5V	1.3V ~ 5.5V	-	-40°C ~ 85°C	Surface Mount	14-WFDFN Exposed Pad	14-TDFN (3x3)
	DS1344D-3+T&R IC RTC CLK/CAL SPI 14TDFN Analog Devices Inc./Maxim Integrated	50	$5.71			Tape & Reel (TR)	Active	Clock/Calendar	Alarm, Leap Year, NVRAM, Square Wave Output, Trickle Charger	96B	HH:MM:SS (12/24 hr)	YY-MM-DD-dd	SPI	2.7V ~ 5.5V	1.3V ~ 5.5V	-	-40°C ~ 85°C	Surface Mount	14-WFDFN Exposed Pad	14-TDFN (3x3)
	ECS-RTC-3225-5699C3-TR IC RTC CLK/CALENDAR I2C MODULE ECS Inc.	12	$5.76			Tape & Reel (TR)	Active	Clock/Calendar	Alarm, Leap Year	-	HH:MM:SS	YY-MM-DD-dd	I²C, Serial	2.5V ~ 5V	1.6V ~ 5V	4.9µA ~ 5.1µA @ 3V ~ 5V	-40°C ~ 85°C	Surface Mount	10-SMD, No Lead	10-SMD
	DS1306EN+T&R IC RTC CLK/CALENDAR SPI 20-TSSOP Analog Devices Inc./Maxim Integrated	105	$5.85			Tape & Reel (TR)	Active	Clock/Calendar	Alarm, Leap Year, NVSRAM, Square Wave Output, Trickle-Charger	96B	HH:MM:SS (12/24 hr)	YY-MM-DD-dd	SPI	2V ~ 5.5V	2V ~ 5.5V	25.3µA ~ 81µA @ 2V ~ 5V	-40°C ~ 85°C	Surface Mount	20-TSSOP (0.173", 4.40mm Width)	20-TSSOP
	DS1344E-3+ IC RTC CLK/CALENDAR SPI 20-TSSOP Analog Devices Inc./Maxim Integrated	59	$5.98			Tube	Active	Clock/Calendar	Alarm, Leap Year, NVRAM, Square Wave Output, Trickle Charger	96B	HH:MM:SS (12/24 hr)	YY-MM-DD-dd	SPI	2.7V ~ 5.5V	1.3V ~ 5.5V	-	-40°C ~ 85°C	Surface Mount	20-TSSOP (0.173", 4.40mm Width)	20-TSSOP
	AB-RTCMC-32.768KHZ-AIGZ-S7-T IC RTC CLK/CALENDAR I2C 8-CLCC Abracon LLC	199	$4.94			Tape & Reel (TR)	Active	Clock/Calendar	Alarm, Leap Year, Watchdog Timer	-	HH:MM:SS:hh (24 hr)	YY-MM-DD-dd	I²C, 2-Wire Serial	1V ~ 4.4V	-	0.4µA ~ 0.95µA @ 1V ~ 4.4V	-40°C ~ 85°C	Surface Mount	8-WCDFN	8-CLCC (3.2x1.5)
	AB-RTCMC-32.768KHZ-ZIZE-S2-T IC RTC CLK/CALENDAR SPI MODULE Abracon LLC	58	$6.83			Tape & Reel (TR)	Active	Clock/Calendar	Alarm, Leap Year, Square Wave Output, Watchdog Timer	-	HH:MM:SS (12/24 hr)	YY-MM-DD-dd	SPI	1.1V ~ 5.5V	-	0.35µA ~ 0.4µA @ 2V ~ 5V	-40°C ~ 85°C	Surface Mount	10-SMD Module	Module
	AB-RTCMK-32.768KHZ-T3 IC RTC CLK/CALENDAR I2C 8-SMT Abracon LLC	107	$6.55			Tape & Reel (TR)	Obsolete	Clock/Calendar	Alarm, Leap Year, Square Wave Output, TCXO/Crystal	-	HH:MM:SS (12/24 hr)	YY-MM-DD	I²C, 2-Wire Serial	1.3V ~ 5.5V	-	2µA @ 3V	-40°C ~ 85°C	Surface Mount	8-SMD Module	8-SMT
	BQ4802LYPWR IC RTC CLK/CALENDAR PAR 28-TSSOP Texas Instruments	120	$6.54			Tape & Reel (TR)	Active	Clock/Calendar	Alarm, Daylight Savings, Leap Year, Supervisor, Watchdog Timer	-	HH:MM:SS (12/24 hr)	YY-MM-DD-dd	Parallel	2.7V ~ 3.6V	2.4V ~ 4V	1.5mA (Typ) @ 2.7 V ~ 3.6 V	0°C ~ 70°C	Surface Mount	28-TSSOP (0.173", 4.40mm Width)	28-TSSOP
	DS1339C-33#T&R IC RTC CLK/CALENDAR I2C 16-SOIC Analog Devices Inc./Maxim Integrated	96	$6.58			Tape & Reel (TR)	Active	Clock/Calendar	Alarm, Leap Year, Square Wave Output, Trickle-Charger	-	HH:MM:SS (12/24 hr)	YY-MM-DD-dd	I²C, 2-Wire Serial	2.97V ~ 5.5V	1.3V ~ 3.7V	200µA @ 5.5V	-40°C ~ 85°C	Surface Mount	16-SOIC (0.295", 7.50mm Width)	16-SOIC
	BQ4802LYDWR IC RTC CLK/CALENDAR PAR 28-SOIC Texas Instruments	4	$6.79			Tape & Reel (TR)	Active	Clock/Calendar	Alarm, Daylight Savings, Leap Year, Supervisor, Watchdog Timer	-	HH:MM:SS (12/24 hr)	YY-MM-DD-dd	Parallel	2.7V ~ 3.6V	2.4V ~ 4V	1.5mA (Typ) @ 2.7 V ~ 3.6 V	0°C ~ 70°C	Surface Mount	28-SOIC (0.295", 7.50mm Width)	28-SOIC
	BQ4802YDWR IC RTC CLK/CALENDAR PAR 28-SOIC Texas Instruments	35	$17.15			Tape & Reel (TR)	Active	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-SOIC (0.295", 7.50mm Width)	28-SOIC
	DS17885SN-3+ IC RTC CLK/CALENDAR PAR 24-SOIC Analog Devices Inc./Maxim Integrated	6	$25.31			Tube	Active	Clock/Calendar	Alarm, Daylight Savings, Leap Year, NVSRAM, Square Wave Output	8KB	HH:MM:SS (12/24 hr)	YY-MM-DD-dd	Parallel	2.7V ~ 3.7V	2.5V ~ 3.7V	2mA @ 2.7V ~ 3.7V	-40°C ~ 85°C	Surface Mount	24-SOIC (0.295", 7.50mm Width)	24-SOIC
	R2043T-E2-F SERIAL INTERFACE REALTIME CLOCK Nisshinbo Micro Devices Inc.	584	$1.58			Tape & Reel (TR)	Active	Clock/Calendar	Alarm, Leap Year	-	HH:MM:SS (12/24 hr)	YY-MM-DD-dd	4-Wire Serial	1.7V ~ 5.5V	-	1µA @ 3V	-40°C ~ 85°C	Surface Mount	10-VFSOP, 10-MSOP (0.110", 2.80mm Width)	10-TSSOPG
	EM3028V3TP14B REAL TIME CLOCK IC, DIE EM Microelectronic	311	$1.62			Tape & Reel (TR)	Active	Clock/Calendar	Alarm, EEPROM, Leap Year, Square Wave Output, SRAM, Trickle-Charger	43B	HH:MM:SS:hh (12/24 hr)	YY-MM-DD-dd	I²C, 2-Wire Serial	1.1V ~ 5.5V	1.1V ~ 5.5V	0.4µA @ 5V	-40°C ~ 85°C	Surface Mount	14-TSSOP (0.173", 4.40mm Width)	14-TSSOP
	RS5C372A-E2-F IC REAL TIME CLOCK 2 WIRE Nisshinbo Micro Devices Inc.	240	$1.70			Tape & Reel (TR)	Active	Clock/Calendar	Alarm, Leap Year	-	HH:MM:SS (12/24 hr)	YY-MM-DD-dd	I²C, 2-Wire Serial	1.7V ~ 6V	-	0.9µA ~ 2µA @ 3V ~ 6V	-40°C ~ 85°C	Surface Mount	8-LSSOP (0.173", 4.40mm Width)	8-SSOP
	SRC32CN-32.768K IC RTC 3225 CMOS 5ppm Suntsu Electronics, Inc.	105	$3.16		SRC32C	Bulk	Active	Clock/Calendar	Alarm, Leap Year, RAM	-	HH:MM:SS	YY-MM-DD-dd	I²C	1.6V ~ 3V	-	3µA	-40°C ~ 85°C	Surface Mount	10-SMD, No Lead	10-SMD
	ISL12024IRTCZ REAL-TIME CLOCK/CALENDAR WITH EM Intersil	120	$3.69			Bulk	Active	-	-	-	-	-	-	-	-	-	-	-	-	-
	RV-8564-C3-32.768KHZ-20PPM-TA-QC IC RTC CLK/CALENDAR I2C 10SON Micro Crystal AG	123	$3.82			Tape & Reel (TR)	Active	Clock/Calendar	Alarm, Leap Year, Programmable Clock Output, Timer	-	HH:MM:SS (24 hr)	YY-MM-DD-dd	I²C, 2-Wire Serial	1V ~ 5.5V	-	0.35µA @ 3V	-40°C ~ 85°C (TA)	Surface Mount	10-VCDFN	10-SON (3.7x2.5)
	SLR32CN-32.768K IC RTC 3225 CMOS 5ppm Suntsu Electronics, Inc.	229	$3.92			Bulk	Active	Clock/Calendar	Alarm, Leap Year, RAM	-	HH:MM:SS	YY-MM-DD	I²C	2.5V ~ 5V	1.6V ~ 5V	500nA @ 3V	-40°C ~ 85°C	Surface Mount	10-SMD, No Lead	10-SMD