Real Time Clocks

What is a Real Time Clock?
A Real Time Clock (RTC) is a computer clock which is usually in the form of an integrated circuit. They have been designed to keep track of time, in real time - hence the product name. A Real Time Clock is usually an integral part of the computer motherboard. More often than not, a RTC will also include a calendar and an alarm

How do Real Time Clocks work?
The memory on the clocks system stores system descriptions and set up values such as "Current Time Value". The information that is held in the RTC is read with a microprocessor, commonly over a serial interface which facilitate the performance of the software functions that are time dependant. They are designed to run on an ultra-low power consumption, often run on a lithium battery source or normal power. This power source allows them to continue running and generating real time when a system is down. The newer models of RTC use super-capacitors as a source of power that can be recharged and soldered to the board.
Some Real Time Clocks feature synchronisation to an external signal, such as a compensated power line frequency. It allows the device to provide an accurate result without having an on-board temperature compensation scheme.

RTC Time Values
• Year
• Month
• Date
• Hours
• Minutes
• Seconds

...
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Beskrivning Pris Functions Date Format Time Format User RAM Bus Type Mounting Type Package Type Pin Count Dimensions Length Width Height Maximum Operating Supply Voltage Maximum Operating Temperature
RS-artikelnummer 714-7298
Tillv. art.nrM48T18-100PC1
VarumärkeSTMicroelectronics
205,56 kr
Each
Enheter
Battery Backup, Calendar, Chip Deselect, Switch Over, Write Protection DW:DM:M:Y HH:MM:SS 8192B Parallel Through Hole PCDIP 28 39.88 x 18.34 x 8.89mm 39.88mm 18.34mm 8.89mm 5.5 V +70 °C
RS-artikelnummer 919-6337
Tillv. art.nrM48T18-100PC1
VarumärkeSTMicroelectronics
186,818 kr
Each (In a Tube of 12)
Enheter
Battery Backup, Calendar, Chip Deselect, Switch Over, Write Protection DW:DM:M:Y HH:MM:SS 8192B Parallel Through Hole PCDIP 28 39.88 x 18.34 x 8.89mm 39.88mm 18.34mm 8.89mm 5.5 V +70 °C
RS-artikelnummer 732-7309
Tillv. art.nrDS12887A+
VarumärkeMaxim
94,20 kr
Each
Enheter
Alarm, Calendar Binary, DW:DM:M:Y Binary, HH:MM:SS 114B Multiplexed Through Hole EDIP 24 34.04 x 18.29 x 9.4mm 34.04mm 18.29mm 9.4mm 5.5 V +70 °C
RS-artikelnummer 136-0682
Tillv. art.nrDS12887A+
VarumärkeMaxim
85,157 kr
Each (In a Tube of 14)
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- - - - - - - - - - - - - -
RS-artikelnummer 778-1484
Tillv. art.nrDS3231MZ+
VarumärkeMaxim
71,55 kr
Each
Enheter
Battery Backup, Calendar Binary HH:MM:SS - Serial-I2C Surface Mount SOIC 8 5 x 4 x 1.5mm 5mm 4mm 1.5mm 5.5 V +85 °C
RS-artikelnummer 165-8990
Tillv. art.nrDS1687-5+
VarumärkeMaxim
110,468 kr
Each (In a Tube of 14)
Enheter
Alarm, Battery Backup, Calendar Binary, DW:DM:M:Y Binary, HH:MM:SS 242B Multiplexed Through Hole EDIP 24 34.04 x 18.8 x 9.4mm 34.04mm 18.8mm 9.4mm 5.5 V +70 °C
RS-artikelnummer 165-9743
Tillv. art.nrDS3231MZ+
VarumärkeMaxim
53,392 kr
Each (In a Tube of 100)
Enheter
Battery Backup, Calendar Binary HH:MM:SS - Serial-I2C Surface Mount SOIC 8 5 x 4 x 1.5mm 5mm 4mm 1.5mm 5.5 V +85 °C
RS-artikelnummer 829-0380
Tillv. art.nrM41T00M6F
VarumärkeSTMicroelectronics
23,534 kr
Each (In a Pack of 5)
Enheter
Calendar D:M:Y:C HH:MM:SS 8B Serial-I2C Surface Mount SOIC 8 5 x 4 x 1.5mm 5mm 4mm 1.5mm 5.5 V +85 °C
RS-artikelnummer 920-9120
Tillv. art.nrM41T00M6F
VarumärkeSTMicroelectronics
12,144 kr
Each (On a Reel of 2500)
Enheter
Calendar D:M:Y:C HH:MM:SS 8B Serial-I2C Surface Mount SOIC 8 5 x 4 x 1.5mm 5mm 4mm 1.5mm 5.5 V +85 °C
RS-artikelnummer 139-559
Tillv. art.nrDS1687-5+
VarumärkeMaxim
121,50 kr
Each
Enheter
Alarm, Battery Backup, Calendar Binary, DW:DM:M:Y Binary, HH:MM:SS 242B Multiplexed Through Hole EDIP 24 34.04 x 18.8 x 9.4mm 34.04mm 18.8mm 9.4mm 5.5 V +70 °C
RS-artikelnummer 774-7403
Tillv. art.nrMCP7940M-I/P
VarumärkeMicrochip
5,677 kr
Each (In a Bag of 10)
Enheter
Alarm, Calendar DW:DM:M:Y HH:MM:SS 64B Serial-I2C Through Hole PDIP 8 10.16 x 7.11 x 4.95mm 10.16mm 7.11mm 4.95mm 5.5 V +85 °C
RS-artikelnummer 732-7352
Tillv. art.nrDS1337S+
VarumärkeMaxim
27,71 kr
Each
Enheter
Calendar DW:DM:M:Y HH:MM:SS - Serial-I2C Surface Mount SOIC 8 5 x 4 x 1.5mm 5mm 4mm 1.5mm 5.5 V +85 °C
RS-artikelnummer 923-7469
Tillv. art.nrDS1337S+T&R
VarumärkeMaxim
11,248 kr
Each (On a Reel of 2500)
Enheter
Calendar YY:MM:DD HH:MM:SS - Serial-I2C Surface Mount SOIC 8 5 x 4 x 1.5mm 5mm 4mm 1.5mm 5.5 V +85 °C
RS-artikelnummer 798-5258
Tillv. art.nrMCP7940N-I/SN
VarumärkeMicrochip
6,494 kr
Each (In a Pack of 10)
Enheter
Battery Backup, Calendar DW:DM:M:Y HH:MM:SS 64B Serial-I2C Surface Mount SOIC 8 4.9 x 3.9 x 1.5mm 4.9mm 3.9mm 1.5mm 5.5 V +85 °C
RS-artikelnummer 865-2208
Tillv. art.nrPCF8563T/5,518
VarumärkeNXP
7,062 kr
Each (In a Pack of 10)
Enheter
Calendar, Clock YY:MM:DD:dd HH:MM:SS - Serial-2 Wire, Serial-I2C Surface Mount SOIC 8 5 x 4 x 1.45mm 5mm 4mm 1.45mm 5.5 V +85 °C
RS-artikelnummer 761-3896
Tillv. art.nrDS1337S+T&R
VarumärkeMaxim
11,246 kr
Each (In a Pack of 5)
Enheter
Calendar YY:MM:DD HH:MM:SS - Serial-I2C Surface Mount SOIC 8 5 x 4 x 1.5mm 5mm 4mm 1.5mm 5.5 V +85 °C
RS-artikelnummer 146-0203
Tillv. art.nrMCP7940M-I/P
VarumärkeMicrochip
5,499 kr
Each (In a Tube of 60)
Enheter
Alarm, Calendar DW:DM:M:Y HH:MM:SS 64B Serial-I2C Through Hole PDIP 8 10.16 x 7.11 x 4.95mm 10.16mm 7.11mm 4.95mm 5.5 V +85 °C
RS-artikelnummer 923-5804
Tillv. art.nrDS1337S+
VarumärkeMaxim
19,172 kr
Each (In a Tube of 400)
Enheter
Calendar DW:DM:M:Y HH:MM:SS - Serial-I2C Surface Mount SOIC 8 5 x 4 x 1.5mm 5mm 4mm 1.5mm 5.5 V +85 °C
RS-artikelnummer 124-2362
Tillv. art.nrPCF8563T/5,518
VarumärkeNXP
6,804 kr
Each (On a Reel of 2500)
Enheter
Calendar, Clock YY:MM:DD:dd HH:MM:SS - Serial-2 Wire, Serial-I2C Surface Mount SOIC 8 5 x 4 x 1.45mm 5mm 4mm 1.45mm 5.5 V +85 °C
RS-artikelnummer 923-5797
Tillv. art.nrDS1307ZN+
VarumärkeMaxim
26,975 kr
Each (In a Tube of 100)
Enheter
Calendar DW:DM:M:Y HH:MM:SS 56B Serial-I2C Surface Mount SOIC 8 5 x 4 x 1.5mm 5mm 4mm 1.5mm 5.5 V +85 °C
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