Real Time Clocks

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Mfr Part #	Quantity Available	Price	Series	Package	Product Status	DigiKey Programmable	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

M48T58Y-70MH1F IC RTC CLK/CALENDAR PAR 28SOH STMicroelectronics	1,810 In Stock	1 : $15.61000 Cut Tape (CT) 936 : $9.77571 Tape & Reel (TR)	Timekeeper®	Tape & Reel (TR) Cut Tape (CT) Digi-Reel®	Active	Not Verified	Clock/Calendar	Leap Year	-	HH:MM:SS (24 hr)	YY-MM-DD-dd	Parallel	4.5V ~ 5.5V	-	3mA @ 4.5V ~ 5.5V	0°C ~ 70°C	Surface Mount	28-SOIC (0.337", 8.56mm Width) with SNAPHAT Sockets	28-SOH
M48T02-70PC1 IC RTC CLK/CALENDAR PAR 24DIP STMicroelectronics	1,001 In Stock	1 : $22.02000 Tube	Timekeeper®	Tube	Active	Not Verified	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®
M48T08Y-10MH1F IC RTC CLK/CALENDAR PAR 28SOH STMicroelectronics	2,093 In Stock	1 : $23.77000 Cut Tape (CT) 936 : $15.35074 Tape & Reel (TR)	Timekeeper®	Tape & Reel (TR) Cut Tape (CT)	Active	Not Verified	Clock/Calendar	Leap Year, Watchdog Timer	-	HH:MM:SS (24 hr)	YY-MM-DD-dd	Parallel	4.5V ~ 5.5V	-	3mA @ 4.5V ~ 5.5V	0°C ~ 70°C	Surface Mount	28-SOP (0.350", 8.89mm Width) with SNAPHAT Sockets	28-SOH
M48T35Y-70MH1F IC RTC CLK/CALENDAR PAR 28SOH STMicroelectronics	1,093 In Stock	1 : $23.81000 Cut Tape (CT) 936 : $15.38099 Tape & Reel (TR)	Timekeeper®	Tape & Reel (TR) Cut Tape (CT) Digi-Reel®	Active	Not Verified	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 44SOH STMicroelectronics	404 In Stock	1 : $24.30000 Cut Tape (CT) 936 : $15.71606 Tape & Reel (TR)	Timekeeper®	Tape & Reel (TR) Cut Tape (CT) Digi-Reel®	Active	Not Verified	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
M48T35AV-10MH1F IC RTC CLK/CALENDAR PAR 28SOH STMicroelectronics	188 In Stock	1 : $24.67000 Cut Tape (CT) 936 : $15.97594 Tape & Reel (TR)	Timekeeper®	Tape & Reel (TR) Cut Tape (CT) Digi-Reel®	Active	Not Verified	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	Surface Mount	28-SOP (0.350", 8.89mm Width) with SNAPHAT Sockets	28-SOH
M48T02-150PC1 IC RTC CLK/CALENDAR PAR 24DIP STMicroelectronics	127 In Stock	1 : $24.87000 Tube	Timekeeper®	Tube	Active	Not Verified	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®
M48T201Y-70MH1F IC RTC CLK/CALENDAR PAR 44SOH STMicroelectronics	3,558 In Stock	1 : $16.69000 Cut Tape (CT) 936 : $10.50497 Tape & Reel (TR)	Timekeeper®	Tape & Reel (TR) Cut Tape (CT) Digi-Reel®	Active	Not Verified	Clock/Calendar	Alarm, Leap Year, Square Wave Output, Supervisor, Watchdog Timer, Y2K	-	HH:MM:SS (24 hr)	YY-MM-DD-dd	Parallel	4.5V ~ 5.5V	3V	3mA @ 4.5V ~ 5.5V	0°C ~ 70°C	Surface Mount	44-BSOP (0.337", 8.56mm Width) requires SNAPHAT	44-SOH
M48T12-70PC1 IC RTC CLK/CALENDAR PAR 24DIP STMicroelectronics	488 In Stock	1 : $21.56000 Tube	Timekeeper®	Tube	Active	Not Verified	Clock/Calendar	Leap Year	-	HH:MM:SS (24 hr)	YY-MM-DD-dd	Parallel	4.5V ~ 5.5V	-	3mA @ 4.5V ~ 5.5V	0°C ~ 70°C	Through Hole	24-DIP Module (0.600", 15.24mm)	24-PCDIP, CAPHAT®
M48T37Y-70MH1F IC RTC CLK/CALENDAR PAR 44SOH STMicroelectronics	269 In Stock	1 : $21.64000 Cut Tape (CT) 936 : $12.86112 Tape & Reel (TR)	Timekeeper®	Tape & Reel (TR) Cut Tape (CT) Digi-Reel®	Active	Not Verified	Clock/Calendar	Alarm, Leap Year, Watchdog Timer	-	HH:MM:SS (24 hr)	YY-MM-DD-dd	Parallel	4.5V ~ 5.5V	-	3mA @ 4.5V ~ 5.5V	0°C ~ 70°C	Surface Mount	44-BSOP (0.337", 8.56mm Width) requires SNAPHAT	44-SOH
M48T201V-85MH1F IC RTC CLK/CALENDAR PAR 44SOH STMicroelectronics	621 In Stock	1 : $16.44000 Cut Tape (CT) 936 : $10.33608 Tape & Reel (TR)	Timekeeper®	Tape & Reel (TR) Cut Tape (CT)	Active	Not Verified	Clock/Calendar	Alarm, Leap Year, Square Wave Output, Supervisor, Watchdog Timer, Y2K	-	HH:MM:SS (24 hr)	YY-MM-DD-dd	Parallel	3V ~ 3.6V	3V	2mA @ 3V ~ 3.6V	0°C ~ 70°C	Surface Mount	44-BSOP (0.337", 8.56mm Width) requires SNAPHAT	44-SOH
M48T35AV-10PC1 IC RTC CLK/CALENDAR PAR 28DIP STMicroelectronics	96 In Stock	1 : $21.98000 Tube	Timekeeper®	Tube	Active	Not Verified	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®
M48T35-70PC1 IC RTC CLK/CALENDAR PAR 28DIP STMicroelectronics	0 In Stock Check Lead Time	1 : $34.87000 Tube	Timekeeper®	Tube	Active	Not Verified	Clock/Calendar	Leap Year	-	HH:MM:SS (24 hr)	YY-MM-DD-dd	Parallel	4.75V ~ 5.5V	-	2mA @ 4.75V ~ 5.5V	0°C ~ 70°C	Through Hole	28-DIP Module (0.600", 15.24mm)	28-PCDIP, CAPHAT®
M48T12-150PC1 IC RTC CLK/CALENDAR PAR 24DIP STMicroelectronics	2 In Stock	1 : $26.23000 Tube	Timekeeper®	Tube	Active	Not Verified	Clock/Calendar	Leap Year	-	HH:MM:SS (24 hr)	YY-MM-DD-dd	Parallel	4.5V ~ 5.5V	-	3mA @ 4.5V ~ 5.5V	0°C ~ 70°C	Through Hole	24-DIP Module (0.600", 15.24mm)	24-PCDIP, CAPHAT®
M48T58Y-70PC1 IC RTC CLK/CALENDAR PAR 28-DIP STMicroelectronics	0 In Stock Check Lead Time	1 : $26.23000 Tube	Timekeeper®	Tube	Active	Not Verified	Clock/Calendar	Leap Year	-	HH:MM:SS (24 hr)	YY-MM-DD-dd	Parallel	4.5V ~ 5.5V	-	3mA @ 4.5V ~ 5.5V	0°C ~ 70°C	Through Hole	28-DIP Module (0.600", 15.24mm)	28-PCDIP, CAPHAT®
M48T58-70PC1 IC RTC CLK/CALENDAR PAR 28DIP STMicroelectronics	2 In Stock	1 : $27.40000 Tube	Timekeeper®	Tube	Active	Not Verified	Clock/Calendar	Leap Year	-	HH:MM:SS (24 hr)	YY-MM-DD-dd	Parallel	4.75V ~ 5.5V	-	3mA @ 4.75V ~ 5.5V	0°C ~ 70°C	Through Hole	28-DIP Module (0.600", 15.24mm)	28-PCDIP, CAPHAT®
M48T18-100PC1 IC RTC CLK/CALENDAR PAR 28DIP STMicroelectronics	0 In Stock Check Lead Time	1 : $22.61000 Tube	Timekeeper®	Tube	Active	Not Verified	Clock/Calendar	Leap Year, Watchdog Timer	-	HH:MM:SS (24 hr)	YY-MM-DD-dd	Parallel	4.5V ~ 5.5V	-	3mA @ 4.5V ~ 5.5V	0°C ~ 70°C	Through Hole	28-DIP Module (0.600", 15.24mm)	28-PCDIP, CAPHAT®
M48T08-100PC1 IC RTC CLK/CALENDAR PAR 28DIP STMicroelectronics	0 In Stock Check Lead Time	1 : $26.76000 Tube	Timekeeper®	Tube	Active	Not Verified	Clock/Calendar	Leap Year, Watchdog Timer	-	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	28-DIP Module (0.600", 15.24mm)	28-PCDIP, CAPHAT®
M48T35Y-70PC1 IC RTC CLK/CALENDAR PAR 28DIP STMicroelectronics	0 In Stock Check Lead Time	1 : $31.94000 Tube	Timekeeper®	Tube	Active	Not Verified	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®
M48T18-150PC1 IC RTC CLK/CALENDAR PAR 28DIP STMicroelectronics	0 In Stock Check Lead Time	1 : $24.92000 Tube	Timekeeper®	Tube	Active	Not Verified	Clock/Calendar	Leap Year, Watchdog Timer	-	HH:MM:SS (24 hr)	YY-MM-DD-dd	Parallel	4.5V ~ 5.5V	-	3mA @ 4.5V ~ 5.5V	0°C ~ 70°C	Through Hole	28-DIP Module (0.600", 15.24mm)	28-PCDIP, CAPHAT®
M48T08-150PC1 IC RTC CLK/CALENDAR PAR 28DIP STMicroelectronics	0 In Stock Check Lead Time	1 : $25.96000 Tube	Timekeeper®	Tube	Active	Not Verified	Clock/Calendar	Leap Year, Watchdog Timer	-	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	28-DIP Module (0.600", 15.24mm)	28-PCDIP, CAPHAT®
M41T50Q6F IC RTC CLK/CALENDAR I2C 16QFN STMicroelectronics	0 In Stock	3,000 : $0.69573 Tape & Reel (TR)	Timekeeper®	Tape & Reel (TR)	Obsolete	Not Verified	Clock/Calendar	Alarm, Leap Year, Square Wave Output	-	HH:MM:SS (24 hr)	YY-MM-DD-dd	I2C, 2-Wire Serial	1.7V ~ 3.6V	-	0.7µA @ 1.7V ~ 3.6V	-40°C ~ 85°C	Surface Mount	16-VFQFN Exposed Pad	16-QFN (3x3)
M41T64Q6F IC RTC CLK/CALENDAR I2C 16QFN STMicroelectronics	0 In Stock	1 : $2.28000 Cut Tape (CT) 3,000 : $1.16805 Tape & Reel (TR)	Timekeeper®	Tape & Reel (TR) Cut Tape (CT) Digi-Reel®	Obsolete	Not Verified	Clock/Calendar	Alarm, Leap Year, Square Wave Output, Watchdog Timer	-	HH:MM:SS:hh (24 hr)	YY-MM-DD-dd	I2C, 2-Wire Serial	1.3V ~ 4.4V	-	0.7µA ~ 0.95µA @ 1.3V ~ 4.4V	-40°C ~ 85°C	Surface Mount	16-VFQFN Exposed Pad	16-QFN (3x3)
M41T66Q6F IC RTC CLK/CALENDAR I2C 16QFN STMicroelectronics	0 In Stock	1 : $2.28000 Cut Tape (CT) 3,000 : $1.16805 Tape & Reel (TR)	Timekeeper®	Tape & Reel (TR) Cut Tape (CT) Digi-Reel®	Obsolete	Not Verified	Clock/Calendar	Alarm, Leap Year, Square Wave Output, Watchdog Timer	-	HH:MM:SS:hh (24 hr)	YY-MM-DD-dd	I2C, 2-Wire Serial	1.5V ~ 4.4V	-	0.9µA ~ 1.1µA @ 1.5V ~ 4.4V	-40°C ~ 85°C	Surface Mount	16-VFQFN Exposed Pad	16-QFN (3x3)
M41T62Q6F IC RTC CLK/CALENDAR I2C 16QFN STMicroelectronics	0 In Stock	1 : $2.34000 Cut Tape (CT) 3,000 : $1.20377 Tape & Reel (TR)	Timekeeper®	Tape & Reel (TR) Cut Tape (CT) Digi-Reel®	Obsolete	Not Verified	Clock/Calendar	Alarm, Leap Year, Square Wave Output, Watchdog Timer	-	HH:MM:SS:hh (24 hr)	YY-MM-DD-dd	I2C, 2-Wire Serial	1.3V ~ 4.4V	-	0.7µA ~ 0.95µA @ 1.3V ~ 4.4V	-40°C ~ 85°C	Surface Mount	16-VFQFN Exposed Pad	16-QFN (3x3)

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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.

Real Time Clocks

Real Time Clocks

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