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
	S-35392A-I8T1U IC RTC CLK/CALENDAR I2C SNT-8A ABLIC Inc.	574	$1.59			Tape & Reel (TR)	Active	Clock/Calendar	Alarm, Leap Year	-	HH:MM:SS (12/24 hr)	YY-MM-DD-dd	I²C, 2-Wire Serial	1.3V ~ 5.5V	-	14µA ~ 30µA @ 3V ~ 5V	-40°C ~ 85°C	Surface Mount	8-SMD, Flat Lead	SNT-8A
	S-35390A-T8T1U IC RTC CLK/CALENDAR I2C 8TSSOP ABLIC Inc.	499	$1.62			Tape & Reel (TR)	Active	Clock/Calendar	Alarm, Leap Year	-	HH:MM:SS (12/24 hr)	YY-MM-DD-dd	I²C, 2-Wire Serial	1.3V ~ 5.5V	-	14µA ~ 30µA @ 3V ~ 5V	-40°C ~ 85°C	Surface Mount	8-TSSOP (0.173", 4.40mm Width)	8-TSSOP
	R2051S01-E2-F I2C-BUS REAL-TIME CLOCK MODULE Nisshinbo Micro Devices Inc.	10	$1.80			Tape & Reel (TR)	Active	Clock/Calendar	Alarm, Leap Year	-	HH:MM:SS (12/24 hr)	YY-MM-DD-dd	I²C, 2-Wire Serial	2.34V ~ 5.5V	-	1µA @ 3V	-40°C ~ 85°C	Surface Mount	16-LSSOP (0.173", 4.40mm Width)	16-SSOP
	PCF85263AUKZ IC RTC/CAL ALM I2C WLCSP NXP USA Inc.	636	$1.57			Tape & Reel (TR)	Active	Clock/Calendar	Alarm, Leap Year, Watchdog Timer	-	HH:MM:SS:hh (12/24 hr)	YY-MM-DD-dd	I²C	0.9V ~ 5.5V, 1.8V ~ 5.5V	0.9V ~ 5.5V	0.885µA @ 3.3V	-40°C ~ 85°C (TA)	Surface Mount	12-XFBGA, WLCSP	12-WLCSP (1.19x0.94)
	MCP7940N-I/ST IC RTC CLK/CALENDAR I2C 8-TSSOP Microchip Technology	868	$0.89		Automotive, AEC-Q100	Tube	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	1.3V ~ 5.5V	1.2µA @ 3.3V	-40°C ~ 85°C	Surface Mount	8-TSSOP (0.173", 4.40mm Width)	8-TSSOP
	MCP7940NT-E/SN IC RTC CLK/CALENDAR I2C 8-SOIC Microchip Technology	191	$0.93		Automotive, AEC-Q100	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	1.3V ~ 5.5V	1.2µA @ 3.3V	-40°C ~ 125°C	Surface Mount	8-SOIC (0.154", 3.90mm Width)	8-SOIC
	MCP7940N-E/MS IC RTC CLK/CALENDAR I2C 8-MSOP Microchip Technology	185	$0.96		Automotive, AEC-Q100	Tube	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	1.3V ~ 5.5V	1.2µA @ 3.3V	-40°C ~ 125°C	Surface Mount	8-TSSOP, 8-MSOP (0.118", 3.00mm Width)	8-MSOP
	MCP79400-I/ST IC RTC CLK/CALENDAR I2C 8-TSSOP Microchip Technology	822	$1.00			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 (0.173", 4.40mm Width)	8-TSSOP
	MCP79401-I/ST IC RTC CLK/CALENDAR I2C 8-TSSOP Microchip Technology	125	$1.09			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 (0.173", 4.40mm Width)	8-TSSOP
	MCP79402-I/ST IC RTC CLK/CALENDAR I2C 8-TSSOP Microchip Technology	105	$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 (0.173", 4.40mm Width)	8-TSSOP
	MCP79412-I/MS IC RTC CLK/CALENDAR I2C 8-MSOP Microchip Technology	786	$1.17			Tube	Active	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-TSSOP, 8-MSOP (0.118", 3.00mm Width)	8-MSOP
	PCF8563TS/5,118 IC RTC CLK/CALENDAR I2C 8-TSSOP NXP USA Inc.	422	$1.67			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-TSSOP, 8-MSOP (0.118", 3.00mm Width)	8-TSSOP
	MCP79512-I/MS IC RTC CLK/CALENDAR SPI 10-MSOP Microchip Technology	64	$1.37			Tube	Active	Clock/Calendar	Alarm, EEPROM, Leap Year, Square Wave Output, SRAM, Unique ID	64B	HH:MM:SS:hh (12/24 hr)	YY-MM-DD-dd	SPI	1.8V ~ 3.6V	1.3V ~ 3.6V	1µA @ 1.8V ~ 3.6V	-40°C ~ 85°C	Surface Mount	10-TFSOP, 10-MSOP (0.118", 3.00mm Width)	10-MSOP
	MCP79521-I/MS IC RTC CLK/CALENDAR SPI 10-MSOP Microchip Technology	192	$1.47			Tube	Active	Clock/Calendar	Alarm, EEPROM, Leap Year, Square Wave Output, SRAM, Unique ID	64B	HH:MM:SS:hh (12/24 hr)	YY-MM-DD-dd	SPI	1.8V ~ 3.6V	1.3V ~ 3.6V	1µA @ 1.8V ~ 3.6V	-40°C ~ 85°C	Surface Mount	10-TFSOP, 10-MSOP (0.118", 3.00mm Width)	10-MSOP
	MCP795W22-I/SL IC RTC CLK/CALENDAR SPI 14-SOIC Microchip Technology	304	$1.91			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-SOIC (0.154", 3.90mm Width)	14-SOIC
	MCP795W22-I/ST IC RTC CLK/CALENDAR SPI 14-TSSOP Microchip Technology	367	$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
	PCA8565TS/1,118 IC RTC CLK/CALENDAR I2C 8-TSSOP NXP USA Inc.	239	$2.27			Tape & Reel (TR)	Active	Clock/Calendar	Alarm, Leap Year, Square Wave Output, Watchdog Timer	-	HH:MM:SS (24 hr)	YY-MM-DD-dd	I²C, 2-Wire Serial	1.8V ~ 5.5V	-	1.2µA ~ 5µA @ 2V ~ 5V	-40°C ~ 125°C	Surface Mount	8-TSSOP, 8-MSOP (0.118", 3.00mm Width)	8-TSSOP
	RV-3149-C3-32.768KHZ-OPTION-B-TA-QC IC RTC CLK/CALENDAR SPI 10SON Micro Crystal AG	223	$3.88			Tape & Reel (TR)	Active	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 ~ 85°C (TA)	Surface Mount	10-VCDFN	10-SON (3.7x2.5)
	DS1302S+T&R IC RTC CLK/CALENDAR SER 8-SOIC Analog Devices Inc./Maxim Integrated	162	$3.95			Tape & Reel (TR)	Active	Clock/Calendar	Leap Year, NVSRAM, Trickle-Charger	31B	HH:MM:SS (12/24 hr)	YY-MM-DD-dd	3-Wire Serial	2V ~ 5.5V	2V ~ 5.5V	0.3µA ~ 1µA @ 2V ~ 5V	0°C ~ 70°C	Surface Mount	8-SOIC (0.209", 5.30mm Width)	8-SOIC
	M41T83ZQA6F IC RTC CLK/CALENDAR I2C 16-QFN STMicroelectronics	107	$4.20			Tape & Reel (TR)	Active	Clock/Calendar	Alarm, Leap Year, Square Wave Output, SRAM, Watchdog Timer	7B	HH:MM:SS:hh (24 hr)	YY-MM-DD-dd	I²C, 2-Wire Serial	2.38V ~ 5.5V	2V ~ 5.5V	10µA @ 5.5V	-40°C ~ 85°C	Surface Mount	16-VQFN Exposed Pad	16-QFN (4x4)