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

200 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
	DS1307ZN+ IC RTC CLK/CALENDAR I2C 8-SOIC Analog Devices Inc./Maxim Integrated	114	$5.06			Tube	Active	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	-40°C ~ 85°C	Surface Mount	8-SOIC (0.154", 3.90mm Width)	8-SOIC
	DS3231SN#T&R IC RTC CLK/CALENDAR I2C 16-SOIC Analog Devices Inc./Maxim Integrated	50	$10.52			Tape & Reel (TR)	Active	Clock/Calendar	Alarm, Leap Year, Square Wave Output, TCXO/Crystal	-	HH:MM:SS (12/24 hr)	YY-MM-DD-dd	I²C, 2-Wire Serial	2.3V ~ 5.5V	2.3V ~ 5.5V	110µA ~ 170µA @ 3.63V ~ 5.5V	-40°C ~ 85°C	Surface Mount	16-SOIC (0.295", 7.50mm Width)	16-SOIC
	DS3231MZ/V+ IC RTC CLK/CALENDAR I2C 8-SOIC Analog Devices Inc./Maxim Integrated	55	$9.45		Automotive, AEC-Q100	Tube	Not For New Designs	Clock/Calendar	Alarm, Leap Year, Square Wave Output	-	HH:MM:SS (12/24 hr)	YY-MM-DD-dd	I²C, 2-Wire Serial	2.3V ~ 5.5V	2.3V ~ 5.5V	130µA ~ 200µA @ 3.63V ~ 5.5V	-40°C ~ 85°C	Surface Mount	8-SOIC (0.154", 3.90mm Width)	8-SOIC
	DS3231MZ+ IC RTC CLK/CALENDAR I2C 8-SOIC Analog Devices Inc./Maxim Integrated	94	$9.56			Tube	Active	Clock/Calendar	Alarm, Leap Year, Square Wave Output	-	HH:MM:SS (12/24 hr)	YY-MM-DD-dd	I²C, 2-Wire Serial	2.3V ~ 5.5V	2.3V ~ 5.5V	130µA ~ 200µA @ 3.63V ~ 5.5V	-40°C ~ 85°C	Surface Mount	8-SOIC (0.154", 3.90mm Width)	8-SOIC
	DS3231SN# IC RTC CLK/CALENDAR I2C 16-SOIC Analog Devices Inc./Maxim Integrated	47	$10.56			Tube	Active	Clock/Calendar	Alarm, Leap Year, Square Wave Output, TCXO/Crystal	-	HH:MM:SS (12/24 hr)	YY-MM-DD-dd	I²C, 2-Wire Serial	2.3V ~ 5.5V	2.3V ~ 5.5V	110µA ~ 170µA @ 3.63V ~ 5.5V	-40°C ~ 85°C	Surface Mount	16-SOIC (0.295", 7.50mm Width)	16-SOIC
	M48T35Y-70MH1F IC RTC CLK/CALENDAR PAR 28SOH STMicroelectronics	30	$23.28		Timekeeper®	Tape & Reel (TR)	Active	Clock/Calendar	Leap Year	-	HH:MM:SS (24 hr)	YY-MM-DD-dd	Parallel	4.5V ~ 5.5V	-	2mA @ 4.75V ~ 5.5V	0°C ~ 70°C	Surface Mount	28-SOP (0.350", 8.89mm Width) with SNAPHAT Sockets	28-SOH
	M48T37V-10MH1F IC RTC CLK/CALENDAR PAR 44-SOH STMicroelectronics	28	$23.23		Timekeeper®	Tape & Reel (TR)	Active	Clock/Calendar	Alarm, Leap Year, Watchdog Timer	-	HH:MM:SS (24 hr)	YY-MM-DD-dd	Parallel	3V ~ 3.6V	-	2mA @ 3V ~ 3.6V	0°C ~ 70°C	Surface Mount	44-BSOP (0.337", 8.56mm Width) requires SNAPHAT	44-SOH
	M48T02-70PC1 IC RTC CLK/CALENDAR PAR 24DIP STMicroelectronics	41	$21.27		Timekeeper®	Tube	Active	Clock/Calendar	Leap Year	-	HH:MM:SS (24 hr)	YY-MM-DD-dd	Parallel	4.75V ~ 5.5V	-	3mA @ 4.7V ~ 5.5V	0°C ~ 70°C	Through Hole	24-DIP Module (0.600", 15.24mm)	24-PCDIP, CAPHAT®
	M48T02-150PC1 IC RTC CLK/CALENDAR PAR 24DIP STMicroelectronics	5	$24.27		Timekeeper®	Tube	Active	Clock/Calendar	Leap Year	-	HH:MM:SS (24 hr)	YY-MM-DD-dd	Parallel	4.75V ~ 5.5V	-	3mA @ 4.7V ~ 5.5V	0°C ~ 70°C	Through Hole	24-DIP Module (0.600", 15.24mm)	24-PCDIP, CAPHAT®
	M48T35AV-10PC1 IC RTC CLK/CALENDAR PAR 28DIP STMicroelectronics	5	$30.78		Timekeeper®	Tube	Active	Clock/Calendar	Leap Year	-	HH:MM:SS (24 hr)	YY-MM-DD-dd	Parallel	3V ~ 3.6V	-	2mA @ 3V ~ 3.6V	0°C ~ 70°C	Through Hole	28-DIP Module (0.600", 15.24mm)	28-PCDIP, CAPHAT®
	BQ32000DR IC RTC CLK/CALENDAR I2C 8-SOIC Texas Instruments	270	$1.68			Tape & Reel (TR)	Active	Clock/Calendar	Leap Year, Square Wave Output, Trickle-Charger	-	HH:MM:SS (24 hr)	YY-MM-DD-dd	I²C, 2-Wire Serial	3V ~ 3.6V	1.4V ~ 3.6V	100µA @ 3.3V	-40°C ~ 85°C	Surface Mount	8-SOIC (0.154", 3.90mm Width)	8-SOIC
	PCF8563T/5,518 IC RTC CLK/CALENDAR I2C 8-SOIC NXP USA Inc.	536	$1.18			Tape & Reel (TR)	Active	Clock/Calendar	Alarm, Leap Year, Watchdog Timer	-	HH:MM:SS (24 hr)	YY-MM-DD-dd	I²C, 2-Wire Serial	1.8V ~ 5.5V	-	0.6µA ~ 0.75µA @ 2V ~ 5V	-40°C ~ 85°C	Surface Mount	8-SOIC (0.154", 3.90mm Width)	8-SO
	PCF85263AT/AJ IC RTC CLK/CALENDAR I2C 8SO NXP USA Inc.	250	$1.39			Tape & Reel (TR)	Active	Clock/Calendar	Alarm, Leap Year, Watchdog Timer	-	HH:MM:SS:hh (12/24 hr)	YY-MM-DD-dd	I²C, 2-Wire Serial	0.9V ~ 5.5V	0.9V ~ 5.5V	0.885µA @ 3.3V	-40°C ~ 85°C	Surface Mount	8-SOIC (0.154", 3.90mm Width)	8-SO
	PCF85263ATT/AJ IC RTC CLK/CALENDAR I2C 8TSSOP NXP USA Inc.	429	$1.37			Tape & Reel (TR)	Active	Clock/Calendar	Alarm, Leap Year, Watchdog Timer	-	HH:MM:SS:hh (12/24 hr)	YY-MM-DD-dd	I²C, 2-Wire Serial	0.9V ~ 5.5V	0.9V ~ 5.5V	0.885µA @ 3.3V	-40°C ~ 85°C	Surface Mount	8-TSSOP, 8-MSOP (0.118", 3.00mm Width)	8-TSSOP
	PCF2123BS/1,518 IC RTC CLK/CALENDAR SPI 16-HVQFN NXP USA Inc.	488	$1.61			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	1.6V ~ 5.5V	-	0.33µA ~ 0.38µA @ 2V ~ 5V	-40°C ~ 85°C	Surface Mount	16-VFQFN Exposed Pad	16-HVQFN (3x3)
	PCA85073ADP/Q900Z AUTO RTC/CAL W/ALRM 8TSSOP NXP USA Inc.	216	$1.64		Automotive, AEC-Q100	Tape & Reel (TR)	Active	Clock/Calendar	Alarm	-	HH:MM:SS (12/24 hr)	YY-MM-DD-dd	I²C	1.8V ~ 5.5V	-	-	-40°C ~ 105°C (TA)	-	-	-
	PCF8523T/1,118 IC RTC CLK/CALENDAR I2C 8-SOIC NXP USA Inc.	166	$1.61			Tape & Reel (TR)	Active	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-SOIC (0.154", 3.90mm Width)	8-SO
	PCA85063ATT/AJ IC RTCC I2C/ALARM 8TSSOP NXP USA Inc.	223	$1.65		Automotive, AEC-Q100	Tape & Reel (TR)	Not For New Designs	Clock/Calendar	Alarm, Leap Year, Square Wave Output	-	HH:MM:SS (12/24 hr)	YY-MM-DD-dd	I²C, 2-Wire Serial	0.9V ~ 5.5V	-	1.8µA @ 5V	-40°C ~ 105°C	Surface Mount	8-TSSOP, 8-MSOP (0.118", 3.00mm Width)	8-TSSOP
	PCF8523TS/1,118 IC RTC CLK/CALENDAR I2C 14-TSSOP NXP USA Inc.	263	$1.72			Tape & Reel (TR)	Active	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	14-TSSOP (0.173", 4.40mm Width)	14-TSSOP
	PCF8563T/F4,118 IC RTC CLK/CALENDAR I2C 8-SOIC NXP USA Inc.	310	$1.70			Tape & Reel (TR)	Active	Clock/Calendar	Alarm, Leap Year, Watchdog Timer	-	HH:MM:SS (24 hr)	YY-MM-DD-dd	I²C, 2-Wire Serial	1.8V ~ 5.5V	-	0.6µA ~ 0.75µA @ 2V ~ 5V	-40°C ~ 85°C	Surface Mount	8-SOIC (0.154", 3.90mm Width)	8-SO