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
	DS1315N-5+ IC RTC PHANTOM PAR 16-DIP Analog Devices Inc./Maxim Integrated	22	$19.61			Tube	Active	Phantom Time Chip	Leap Year	-	HH:MM:SS:hh (12/24 hr)	YY-MM-DD-dd	Parallel	4.5V ~ 5.5V	2.5V ~ 3.7V	1.3mA @ 5V	-40°C ~ 85°C	Through Hole	16-DIP (0.300", 7.62mm)	16-PDIP
	DS1315E-5+ IC RTC PHANTOM PAR 20-TSSOP Analog Devices Inc./Maxim Integrated	45	$19.95			Tube	Active	Phantom Time Chip	Leap Year	-	HH:MM:SS:hh (12/24 hr)	YY-MM-DD-dd	Parallel	4.5V ~ 5.5V	2.5V ~ 3.7V	1.3mA @ 5V	0°C ~ 70°C	Surface Mount	20-TSSOP (0.173", 4.40mm Width)	20-TSSOP
	DS1315E-33+ IC RTC PHANTOM PAR 20-TSSOP Analog Devices Inc./Maxim Integrated	8	$19.99			Tube	Active	Phantom Time Chip	Leap Year	-	HH:MM:SS:hh (12/24 hr)	YY-MM-DD-dd	Parallel	3V ~ 3.6V	2.5V ~ 3.7V	1.1mA @ 3.3V	0°C ~ 70°C	Surface Mount	20-TSSOP (0.173", 4.40mm Width)	20-TSSOP
	DS17887-3+ IC RTC CLK/CALENDAR PAR 24-EDIP Analog Devices Inc./Maxim Integrated	32	$22.99			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	0°C ~ 70°C	Through Hole	24-DIP Module (0.600", 15.24mm)	24-EDIP
	DS1554WP-120+ IC RTC CLK/CALENDAR PAR 34-PCM Analog Devices Inc./Maxim Integrated	32	$28.32			Tray	Active	Clock/Calendar	Alarm, Leap Year, NVSRAM, Watchdog Timer, Y2K	32KB	HH:MM:SS (24 hr)	YY-MM-DD-dd	Parallel	2.97V ~ 3.63V	3V	4mA @ 3.3V	0°C ~ 70°C	Surface Mount	34-PowerCap™ Module	34-PowerCap Module
	DS1556P-70+ IC RTC CLK/CALENDAR PAR 34-PCM Analog Devices Inc./Maxim Integrated	12	$42.06			Tray	Active	Clock/Calendar	Alarm, Leap Year, NVSRAM, Watchdog Timer, Y2K	128KB	HH:MM:SS (24 hr)	YY-MM-DD-dd	Parallel	4.5V ~ 5.5V	3V	6mA @ 5V	0°C ~ 70°C	Surface Mount	34-PowerCap™ Module	34-PowerCap Module
	DS1557WP-120IND+ IC RTC CLK/CALENDAR PAR 34-PCM Analog Devices Inc./Maxim Integrated	6	$51.30			Tray	Active	Clock/Calendar	Alarm, Leap Year, NVSRAM, Watchdog Timer, Y2K	512KB	HH:MM:SS (24 hr)	YY-MM-DD-dd	Parallel	2.97V ~ 3.63V	3V	4mA @ 3.3V	-40°C ~ 85°C	Surface Mount	34-PowerCap™ Module	34-PowerCap Module
	MCP79402-I/MS IC RTC CLK/CALENDAR I2C 8-MSOP Microchip Technology	514	$1.08			Tube	Active	Clock/Calendar	Alarm, Leap Year, Square Wave Output, SRAM, Unique ID	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 (Typ) @ 3.3V	-40°C ~ 85°C	Surface Mount	8-TSSOP, 8-MSOP (0.118", 3.00mm Width)	8-MSOP
	CDP6818AD CMOS REAL-TIME CLOCK WITH RAM Harris Corporation	111	$5.54			Bulk	Active	Clock/Calendar	Alarm, Leap Year, Square Wave Output	50B	HH:MM:SS (12/24 hr)	YY-MM-DD-dd	-	3V ~ 6V	-	50µA ~ 3mA @ 3V ~ 5V	0°C ~ 70°C (TA)	Through Hole	24-CDIP (0.600", 15.24mm)	24-SBDIP
	CDP6818DX CMOS REAL-TIME CLOCK WITH RAM Harris Corporation	120	$6.72			Bulk	Active	Clock/Calendar	Alarm, Leap Year, Square Wave Output	50B	HH:MM:SS (12/24 hr)	YY-MM-DD-dd	-	3V ~ 6V	-	50µA ~ 3mA @ 3V ~ 5V	0°C ~ 70°C (TA)	Through Hole	24-CDIP (0.300", 7.62mm)	24-CERDIP
	M48T35Y-70PC1 IC RTC CLK/CALENDAR PAR 28DIP STMicroelectronics	26	$31.75		Timekeeper®	Tube	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	Through Hole	28-DIP Module (0.600", 15.24mm)	28-PCDIP, CAPHAT®
	MCP7940MT-I/MS IC RTC CLK/CALENDAR I2C 8-MSOP Microchip Technology	1,072	$0.71			Tape & Reel (TR)	Active	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-TSSOP, 8-MSOP (0.118", 3.00mm Width)	8-MSOP
	MCP79400T-I/MS IC RTC CLK/CALENDAR I2C 8-MSOP Microchip Technology	504	$0.98			Tape & Reel (TR)	Active	Clock/Calendar	Alarm, Leap Year, Square Wave Output, SRAM, Unique ID	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 (Typ) @ 3.3V	-40°C ~ 85°C	Surface Mount	8-TSSOP, 8-MSOP (0.118", 3.00mm Width)	8-MSOP
	PCF2123TS/1,118 IC RTC CLK/CALENDAR SPI 14-TSSOP NXP USA Inc.	461	$1.52			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	14-TSSOP (0.173", 4.40mm Width)	14-TSSOP
	PCF2123TS/1,112 IC RTC CLK/CALENDAR SPI 14-TSSOP NXP USA Inc.	592	$0.00			Tube	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	14-TSSOP (0.173", 4.40mm Width)	14-TSSOP
	PCF8563BS/4,118 IC RTC CLK/CALENDAR I2C 10-HVSON NXP USA Inc.	24	$1.62			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	10-VFDFN Exposed Pad	10-HVSON (3x3)
	DS1375T+T&R IC RTC CLK/CALENDAR I2C 6-TDFN Analog Devices Inc./Maxim Integrated	527	$1.82			Tape & Reel (TR)	Active	Clock/Calendar	Alarm, Leap Year, Square Wave Output	16B	HH:MM:SS (12/24 hr)	YY-MM-DD-dd	I²C, 2-Wire Serial	1.7V ~ 5.5V	-	0.5µA @ 1.7V ~ 5.5V	-40°C ~ 85°C	Surface Mount	6-WDFN Exposed Pad	6-TDFN (3x3)
	MCP795W12-I/ST IC RTC CLK/CALENDAR SPI 14-TSSOP Microchip Technology	500	$1.90			Tube	Active	Clock/Calendar	Alarm, EEPROM, Leap Year, Square Wave Output, SRAM, Unique ID, Watchdog Timer	64B	HH:MM:SS:hh (12/24 hr)	YY-MM-DD-dd	SPI	1.8V ~ 3.6V	1.3V ~ 3.6V	1µA @ 1.8V ~ 5.5V	-40°C ~ 85°C	Surface Mount	14-TSSOP (0.173", 4.40mm Width)	14-TSSOP
	MCP795W21-I/ST IC RTC CLK/CALENDAR SPI 14-TSSOP Microchip Technology	218	$1.98			Tube	Active	Clock/Calendar	Alarm, EEPROM, Leap Year, Square Wave Output, SRAM, Unique ID, Watchdog Timer	64B	HH:MM:SS:hh (12/24 hr)	YY-MM-DD-dd	SPI	1.8V ~ 3.6V	1.3V ~ 3.6V	1µA @ 1.8V ~ 5.5V	-40°C ~ 85°C	Surface Mount	14-TSSOP (0.173", 4.40mm Width)	14-TSSOP
	M41T60Q6F IC RTC CLK/CALENDAR I2C 16-QFN STMicroelectronics	279	$2.33			Tape & Reel (TR)	Obsolete	Clock/Calendar	Leap Year	-	HH:MM:SS (24 hr)	YY-MM-DD-dd	I²C, 2-Wire Serial	1.3V ~ 4.4V	-	0.7µA ~ 0.95µA @ 3.6V ~ 4.4V	-40°C ~ 85°C	Surface Mount	16-VFQFN Exposed Pad	16-QFN (3x3)