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
	BQ3285ES IC RTC CLK/CALENDAR PAR 24-SOIC Texas Instruments	25	$0.00			Tube	Obsolete	Clock/Calendar	Alarm, Daylight Savings, Leap Year, NVSRAM, Square Wave Output	242B	HH:MM:SS (12/24 hr)	YY-MM-DD-dd	Parallel	4.5V ~ 5.5V	2.5V ~ 4V	300µA @ 5V	0°C ~ 70°C	Surface Mount	24-SOIC (0.295", 7.50mm Width)	24-SOIC
	BQ3285ESS IC RTC CLK/CALENDAR PAR 24-QSOP Texas Instruments	69	$3.10			Tube	Obsolete	Clock/Calendar	Alarm, Daylight Savings, Leap Year, NVSRAM, Square Wave Output	242B	HH:MM:SS (12/24 hr)	YY-MM-DD-dd	Parallel	4.5V ~ 5.5V	2.5V ~ 4V	300µA @ 5V	0°C ~ 70°C	Surface Mount	24-SSOP (0.154", 3.90mm Width)	24-SSOP
	BQ3285LDSS IC RTC CLK/CALENDAR PAR 24-QSOP Texas Instruments	250	$3.08			Tube	Obsolete	Clock/Calendar	Alarm, Daylight Savings, NVSRAM	242B	HH:MM:SS (12/24 hr)	YY-MM-DD-dd	Parallel	2.7V ~ 5.5V	2.4V ~ 4V	100µA @ 3V	0°C ~ 70°C	Surface Mount	24-SSOP (0.154", 3.90mm Width)	24-SSOP
	BQ3285LSS IC REAL TIME CLOCK 24-QSOP Texas Instruments	342	$2.60			Tube	Obsolete	Clock/Calendar	Alarm, Daylight Savings, Leap Year, NVSRAM, Square Wave Output	242B	HH:MM:SS (12/24 hr)	YY-MM-DD-dd	Parallel	2.7V ~ 3.6V	2.4V ~ 4V	-	-	Surface Mount	24-SSOP (0.154", 3.90mm Width)	24-SSOP
	BQ3285LFSS-A1 IC RTC CLK/CALENDAR PAR 24-QSOP Texas Instruments	89	$3.14			Tube	Obsolete	Clock/Calendar	Alarm, Daylight Savings, Leap Year, NVSRAM, Square Wave Output	242B	HH:MM:SS (12/24 hr)	YY-MM-DD-dd	Parallel	2.7V ~ 5.5V	2.4V ~ 4V	100µA @ 3V	0°C ~ 70°C	Surface Mount	24-SSOP (0.154", 3.90mm Width)	24-SSOP
	BQ3287EAMT IC RTC CLK/CALENDAR PAR 24-DIP Texas Instruments	37	$0.00			Tube	Obsolete	Clock/Calendar	Alarm, Daylight Savings, Leap Year, NVSRAM, Square Wave Output	242B	HH:MM:SS (12/24 hr)	YY-MM-DD-dd	Parallel	4.5V ~ 5.5V	-	-	0°C ~ 70°C	Through Hole	24-DIP Module (0.61", 15.49mm)	24-DIP Module
	BQ3287EMT IC RTC CLK/CALENDAR PAR 24-DIP Texas Instruments	243	$0.00			Tube	Obsolete	Clock/Calendar	Alarm, Daylight Savings, Leap Year, NVSRAM, Square Wave Output	242B	HH:MM:SS (12/24 hr)	YY-MM-DD-dd	Parallel	4.5V ~ 5.5V	-	-	0°C ~ 70°C	Through Hole	24-DIP Module (0.61", 15.49mm)	24-DIP Module
	BQ3287MT-SB2 IC RTC CLK/CALENDAR PAR 24-DIP Texas Instruments	601	$0.00			Tube	Obsolete	Clock/Calendar	Alarm, Daylight Savings, Leap Year, NVSRAM, Square Wave Output	114B	HH:MM:SS (12/24 hr)	YY-MM-DD-dd	Parallel	4.5V ~ 5.5V	-	-	-	Through Hole	24-DIP Module (0.61", 15.49mm)	24-DIP Module
	BQ4285EP IC RTC CLK/CALENDAR PAR 24-DIP Texas Instruments	56	$4.19			Tube	Obsolete	Clock/Calendar	Alarm, Daylight Savings, Leap Year, NVSRAM, Square Wave Output	114B	HH:MM:SS (12/24 hr)	YY-MM-DD-dd	Parallel	4.5V ~ 5.5V	2.5V ~ 4V	300µA @ 5V	0°C ~ 70°C	Through Hole	24-DIP (0.600", 15.24mm)	24-PDIP
	BQ4285LS IC RTC W/114X8 NVSRAM 24-SOP Texas Instruments	294	$1.47			Tube	Obsolete	Clock/Calendar	Alarm, Daylight Savings, Leap Year, NVSRAM, Square Wave Output	114B	HH:MM:SS (12/24 hr)	YY-MM-DD-dd	Parallel	2.7V ~ 3.6V	2.4V ~ 4V	-	-	Surface Mount	24-SOIC (0.295", 7.50mm Width)	24-SOIC
	BQ4285P-SB2 IC RTC CLK/CALENDAR PAR 24-DIP Texas Instruments	35	$4.18			Tube	Obsolete	Clock/Calendar	Alarm, Daylight Savings, Leap Year, NVSRAM, Square Wave Output	114B	HH:MM:SS (12/24 hr)	YY-MM-DD-dd	Parallel	4.5V ~ 5.5V	2.5V ~ 4V	-	0°C ~ 70°C	Through Hole	24-DIP (0.600", 15.24mm)	24-PDIP
	BQ4285S-SB2 IC RTC CLK/CALENDAR PAR 24-SOP Texas Instruments	180	$4.30			Bulk	Obsolete	Clock/Calendar	Alarm, Daylight Savings, Leap Year, NVSRAM, Square Wave Output	114B	HH:MM:SS (12/24 hr)	YY-MM-DD-dd	Parallel	4.5V ~ 5.5V	2.5V ~ 4V	-	0°C ~ 70°C	Surface Mount	24-SOIC (0.295", 7.50mm Width)	24-SOIC
	BQ4822YMA-70 IC RTC CLK/CALENDAR PAR 28-DIP Texas Instruments	333	$0.00			Tube	Obsolete	Clock/Calendar	Alarm, Leap Year, Supervisor, Watchdog Timer	-	HH:MM:SS:hh (24 hr)	YY-MM-DD-dd	Parallel	4.5V ~ 5.5V	-	6mA @ 2.2 V ~ 5.8 V	0°C ~ 70°C	Through Hole	28-DIP Module (0.61", 15.49mm)	28-DIP Module (18.42x37.72)
	BQ4832YMA-85 IC RTC CLK/CALENDAR PAR 32-DIP Texas Instruments	7	$38.34			Tube	Obsolete	Clock/Calendar	Alarm, Supervisor, Watchdog Timer	-	HH:MM:SS:hh (24 hr)	YY-MM-DD-dd	Parallel	4.5V ~ 5.5V	-	4mA @ 4.5 V ~ 5.5 V	0°C ~ 70°C	Through Hole	32-DIP Module (0.610", 15.49mm)	32-DIP Module (18.42x42.8)
	BQ4842YMA-85 IC RTC CLK/CALENDAR PAR 32-DIP Texas Instruments	377	$0.00			Tube	Obsolete	Clock/Calendar	Alarm, Supervisor, Watchdog Timer	-	HH:MM:SS:hh (24 hr)	YY-MM-DD-dd	Parallel	4.5V ~ 5.5V	-	4mA @ 4.5 V ~ 5.5 V	0°C ~ 70°C	Through Hole	32-DIP Module (0.610", 15.49mm)	32-DIP Module (18.42x42.8)
	BQ4845P-A4 IC RTC CLK/CALENDAR PAR 28-DIP Texas Instruments	166	$3.21			Tube	Obsolete	Clock/Calendar	Alarm, Daylight Savings, Leap Year, Supervisor, Watchdog Timer	-	HH:MM:SS (12/24 hr)	YY-MM-DD-dd	Parallel	4.75V ~ 5.5V	2.3V ~ 4V	1.5mA (Typ) @ 4.5 V ~ 5.5 V	0°C ~ 70°C	Through Hole	28-DIP (0.600", 15.24mm)	28-PDIP
	BQ4845S-A4 IC RTC CLK/CALENDAR PAR 28-SOIC Texas Instruments	167	$3.66			Tube	Obsolete	Clock/Calendar	Alarm, Daylight Savings, Leap Year, Supervisor, Watchdog Timer	-	HH:MM:SS (12/24 hr)	YY-MM-DD-dd	Parallel	4.75V ~ 5.5V	2.3V ~ 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
	BQ4845S-A4N IC RTC CLK/CALENDAR PAR 28-SOIC Texas Instruments	4	$3.94			Tube	Obsolete	Clock/Calendar	Alarm, Daylight Savings, Leap Year, Supervisor, Watchdog Timer	-	HH:MM:SS (12/24 hr)	YY-MM-DD-dd	Parallel	4.75V ~ 5.5V	2.3V ~ 4V	1.5mA (Typ) @ 4.5 V ~ 5.5 V	-40°C ~ 85°C	Surface Mount	28-SOIC (0.295", 7.50mm Width)	28-SOIC
	BQ4845YS-A4 IC RTC CLK/CALENDAR PAR 28-SOIC Texas Instruments	155	$3.72			Tube	Obsolete	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	2.3V ~ 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
	BQ4845YS-A4N IC RTC CLK/CALENDAR PAR 28-SOIC Texas Instruments	214	$3.90			Tube	Obsolete	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	2.3V ~ 4V	1.5mA (Typ) @ 4.5 V ~ 5.5 V	-40°C ~ 85°C	Surface Mount	28-SOIC (0.295", 7.50mm Width)	28-SOIC