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, an 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 facilitates the performance of the software functions that are time dependant.

Designed to run on ultra-low power consumption, RTCs often run on a lithium battery source but can also run on 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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Omschrijving Prijs 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-stocknr. 196-9069
FabrikantnummerISL1208IB8Z-TK
1,049 €
Each (On a Reel of 1000)
Aantal stuks
- DW:DM:M:Y HH:MM:SS - - - SOIC 8 - - - - - -
RS-stocknr. 196-9062
FabrikantnummerISL12020MIRZ
4,605 €
Each (In a Tube of 53)
Aantal stuks
- DW:DM:M:Y HH:MM:SS 128B - - DFN 20 - - - - - -
RS-stocknr. 642-3106
FabrikantnummerCDP68HC68T1MZ
4,81 €
Each
Aantal stuks
Alarm, Battery Backup, Calendar, Watchdog Timer DW:DM:M:Y HH:MM:SS 32B Serial-SPI Surface Mount SOIC W 20 13 x 7.6 x 2.35mm 13mm 7.6mm 2.35mm 6 V +85 °C
RS-stocknr. 921-5964
FabrikantnummerISL12022MIBZ
6,185 €
Each (In a Pack of 2)
Aantal stuks
Alarm, Battery Backup, Calendar, Low Battery Detection DW:DM:M:Y SS:MM:HH 128B Serial-I2C Surface Mount SOIC 20 13 x 7.6 x 2.35mm 13mm 7.6mm 2.35mm 5.5 V +85 °C
RS-stocknr. 921-5721
FabrikantnummerISL12020MIRZ
5,29 €
Each (In a Pack of 2)
Aantal stuks
Alarm, Battery Backup, Calendar, Switch Over DW:DM:M:Y HH:MM:SS 128B Serial-I2C Surface Mount DFN 20 5.5 x 4 x 1.3mm 5.5mm 4mm 1.3mm 5.5 V +85 °C
RS-stocknr. 196-9063
FabrikantnummerISL12020MIRZ
5,29 €
Each (In a Pack of 2)
Aantal stuks
- DW:DM:M:Y HH:MM:SS 128B - - DFN 20 - - - - - -
RS-stocknr. 196-9070
FabrikantnummerISL1208IB8Z-TK
2,154 €
Each (In a Pack of 5)
Aantal stuks
- DW:DM:M:Y HH:MM:SS - - - SOIC 8 - - - - - -
RS-stocknr. 196-9066
FabrikantnummerISL12057IUZ
1,753 €
Each (In a Tube of 50)
Aantal stuks
- DW:DM:M:Y HH:MM:SS - - - MSOP 8 - - - - - -
RS-stocknr. 923-1499
FabrikantnummerISL12020MIRZ
4,605 €
Each (In a Tube of 53)
Aantal stuks
Alarm, Battery Backup, Calendar, Switch Over DW:DM:M:Y HH:MM:SS 128B Serial-I2C Surface Mount DFN 20 5.5 x 4 x 1.3mm 5.5mm 4mm 1.3mm 5.5 V +85 °C
RS-stocknr. 921-5396
FabrikantnummerCDP68HC68T1M2Z
11,39 €
Each
Aantal stuks
Alarm, Battery Backup, Calendar, Watchdog Timer DW:DM:M:Y HH:MM:SS 32B Serial-SPI Surface Mount SOIC W 16 10.5 x 7.6 x 2.35mm 10.5mm 7.6mm 2.35mm 6 V +85 °C
RS-stocknr. 196-9068
FabrikantnummerISL12057IUZ
2,076 €
Each (In a Pack of 5)
Aantal stuks
- DW:DM:M:Y HH:MM:SS - - - MSOP 8 - - - - - -
RS-stocknr. 921-5532
FabrikantnummerCDP68HC68T1MZ
10,23 €
Each
Aantal stuks
Alarm, Battery Backup, Calendar, Watchdog Timer DW:DM:M:Y HH:MM:SS 32B Serial-SPI Surface Mount SOIC W 20 13 x 7.6 x 2.35mm 13mm 7.6mm 2.35mm 6 V +85 °C
RS-stocknr. 196-9065
FabrikantnummerISL12022IBZ
3,82 €
Each (In a Pack of 2)
Aantal stuks
- DW:DM:M:Y HH:MM:SS - - - SOIC 8 - - - - - -
RS-stocknr. 196-9064
FabrikantnummerISL12022IBZ
3,24 €
Each (In a Tube of 98)
Aantal stuks
- DW:DM:M:Y HH:MM:SS - - - SOIC 8 - - - - - -