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
	PT7C4363BZEEX IC RTC CAL I2C/2-WIRE SER 8TDFN Diodes Incorporated	3	$1.66			Tape & Reel (TR)	Active	Clock/Calendar	Alarm, Leap Year, Square Wave Output	-	HH:MM:SS (24 hr)	YY-MM-DD-dd	I²C, 2-Wire Serial	1.3V ~ 5.5V	-	0.85µA ~ 0.9µA @ 3V ~ 5V	-40°C ~ 85°C (TA)	Surface Mount	8-WFDFN Exposed Pad	8-TDFN (2x3)
	PT7C43390WEX IC RTC CLK/CALENDAR I2C 8-SOIC Diodes Incorporated	169	$1.68			Tape & Reel (TR)	Active	Clock/Calendar	Alarm, Leap Year, Square Wave Output	-	HH:MM:SS (12/24 hr)	YY-MM-DD-dd	I²C, 2-Wire Serial	1.3V ~ 5.5V	-	0.65µA ~ 0.7µA @ 3V ~ 5V	-40°C ~ 85°C	Surface Mount	8-SOIC (0.154", 3.90mm Width)	8-SOIC
	MCP7940M-I/P IC RTC CLK/CALENDAR I2C 8DIP Microchip Technology	595	$0.73			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	-	1µA @ 5.5V	-40°C ~ 85°C	Through Hole	8-DIP (0.300", 7.62mm)	8-PDIP
	MCP7940MT-I/MNY IC RTC CLK/CALENDAR I2C 8-TDFN Microchip Technology	1,136	$0.76			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-WFDFN Exposed Pad	8-TDFN (2x3)
	S-35190A-J8T1U IC RTC CLK/CALENDAR SER 8SOP ABLIC Inc.	364	$1.61			Tape & Reel (TR)	Active	Clock/Calendar	Alarm, Leap Year	-	HH:MM:SS (12/24 hr)	YY-MM-DD-dd	3-Wire Serial	1.3V ~ 5.5V	-	8µA ~ 14µA @ 3V ~ 5V	-40°C ~ 85°C	Surface Mount	8-SOIC (0.154", 3.90mm Width)	8-SOP-J
	RV5C348A-E2-F IC REAL TIME CLOCK 4 WIRE SERIAL Nisshinbo Micro Devices Inc.	202	$1.72			Tape & Reel (TR)	Active	Clock/Calendar	Alarm, Leap Year	-	HH:MM:SS (12/24 hr)	YY-MM-DD-dd	4-Wire Serial	2V ~ 5.5V	-	1µA @ 3V	-40°C ~ 85°C	Surface Mount	10-LFSOP, 10-MSOP (0.110", 2.80mm Width)	10-SSOP-G
	RV5C348B-E2-F IC REAL TIME CLOCK 4 WIRE SERIAL Nisshinbo Micro Devices Inc.	212	$1.70			Tape & Reel (TR)	Active	Clock/Calendar	Alarm, Leap Year	-	HH:MM:SS (12/24 hr)	YY-MM-DD-dd	4-Wire Serial	2V ~ 5.5V	-	1µA @ 3V	-40°C ~ 85°C	Surface Mount	10-LFSOP, 10-MSOP (0.110", 2.80mm Width)	10-SSOP-G
	BQ32000DR IC RTC CLK/CALENDAR I2C 8-SOIC Texas Instruments	505	$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
	RV-8263-C7-32.768KHZ-20PPM-TA-QA IC RTC CLK/CALENDAR I2C 8SON Micro Crystal AG	465	$1.75		Automotive, AEC-Q200	Tape & Reel (TR)	Active	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)
	MCP7940NT-I/ST IC RTC CLK/CALENDAR I2C 8-TSSOP Microchip Technology	129	$0.92		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	1.5V ~ 5.5V	1.2µA @ 3.3V	-40°C ~ 85°C	Surface Mount	8-TSSOP (0.173", 4.40mm Width)	8-TSSOP
	MCP7940N-E/SN IC RTC CLK/CALENDAR I2C 8-SOIC Microchip Technology	815	$0.92		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-SOIC (0.154", 3.90mm Width)	8-SOIC
	MCP7940N-I/P IC RTC CLK/CALENDAR I2C 8DIP Microchip Technology	345	$0.93		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	Through Hole	8-DIP (0.300", 7.62mm)	8-PDIP
	PCF8563T/5,518 IC RTC CLK/CALENDAR I2C 8-SOIC NXP USA Inc.	214	$1.19			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
	MCP79400-I/SN IC RTC CLK/CALENDAR I2C 8-SOIC Microchip Technology	1,021	$0.93			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-SOIC (0.154", 3.90mm Width)	8-SOIC
	MCP79400-I/MS IC RTC CLK/CALENDAR I2C 8-MSOP Microchip Technology	109	$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, 8-MSOP (0.118", 3.00mm Width)	8-MSOP
	MCP79401-I/SN IC RTC CLK/CALENDAR I2C 8-SOIC Microchip Technology	330	$1.02			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-SOIC (0.154", 3.90mm Width)	8-SOIC
	MCP79402-I/SN IC RTC CLK/CALENDAR I2C 8-SOIC Microchip Technology	551	$1.02			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-SOIC (0.154", 3.90mm Width)	8-SOIC
	MCP79410T-I/ST IC RTC CLK/CALENDAR I2C 8-TSSOP Microchip Technology	790	$1.10			Tape & Reel (TR)	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 (0.173", 4.40mm Width)	8-TSSOP
	MCP79410-I/ST IC RTC CLK/CALENDAR I2C 8-TSSOP Microchip Technology	266	$1.07			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 (0.173", 4.40mm Width)	8-TSSOP
	MCP79401-I/MS IC RTC CLK/CALENDAR I2C 8-MSOP Microchip Technology	660	$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