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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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. 540-2726
FabrikantnummerDS1307+
FabrikantMaxim Integrated
€ 3,51
Each
Aantal stuks
Alarm, Battery Backup, Calendar, Power Fail DW:DM:M:Y HH:MM:SS 56B Serial-I2C Through Hole PDIP 8 9.91 x 7.87 x 4.45mm 9.91mm 7.87mm 4.45mm 5.5 V +70 °C
RS-stocknr. 165-9743
FabrikantnummerDS3231MZ+
FabrikantMaxim Integrated
€ 5,164
Each (In a Tube of 100)
Aantal stuks
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-stocknr. 778-1484
FabrikantnummerDS3231MZ+
FabrikantMaxim Integrated
€ 6,92
Each
Aantal stuks
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-stocknr. 133-781
FabrikantnummerDS12887+
FabrikantMaxim Integrated
€ 8,47
Each
Aantal stuks
Alarm, Battery Backup, Calendar, Power Fail Binary, DW:DM:M:Y Binary, HH:MM:SS 114B 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-stocknr. 146-1112
FabrikantnummerDS12887+
FabrikantMaxim Integrated
€ 7,697
Each (In a Tube of 14)
Aantal stuks
Alarm, Battery Backup, Calendar, Power Fail Binary, DW:DM:M:Y Binary, HH:MM:SS 114B 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-stocknr. 165-9065
FabrikantnummerDS1302+
FabrikantMaxim Integrated
€ 2,738
Each (In a Tube of 50)
Aantal stuks
Alarm, Battery Backup, Calendar DW:DM:M:Y HH:MM:SS 31B Serial Through Hole PDIP 8 9.91 x 7.87 x 4.45mm 9.91mm 7.87mm 4.45mm 5.5 V +70 °C
RS-stocknr. 540-2704
FabrikantnummerDS1302+
FabrikantMaxim Integrated
€ 3,42
Each
Aantal stuks
Alarm, Battery Backup, Calendar DW:DM:M:Y HH:MM:SS 31B Serial Through Hole PDIP 8 9.91 x 7.87 x 4.45mm 9.91mm 7.87mm 4.45mm 5.5 V +70 °C
RS-stocknr. 686-5036
FabrikantnummerM48T58-70PC1
€ 17,29
Each
Aantal stuks
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-stocknr. 920-9004
FabrikantnummerM48T58-70PC1
€ 15,718
Each (In a Tube of 12)
Aantal stuks
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-stocknr. 732-7582
FabrikantnummerDS3231SN#
FabrikantMaxim Integrated
€ 8,89
Each
Aantal stuks
Battery Backup, Calendar DW:DM:M:Y HH:MM:SS - Serial-I2C Surface Mount SOIC 16 10.5 x 7.6 x 2.35mm 10.5mm 7.6mm 2.35mm 5.5 V +85 °C
RS-stocknr. 103-9916
FabrikantnummerDS3231SN#
FabrikantMaxim Integrated
€ 7,654
Each (In a Tube of 46)
Aantal stuks
Battery Backup, Calendar DW:DM:M:Y HH:MM:SS - Serial-I2C Surface Mount SOIC 16 10.5 x 7.6 x 2.35mm 10.5mm 7.6mm 2.35mm 5.5 V +85 °C
RS-stocknr. 761-9759
FabrikantnummerDS1307Z+T&R
FabrikantMaxim Integrated
€ 2,84
Each
Aantal stuks
Battery Backup, Calendar, NV RAM YY:MM:DD HH:MM:SS 56B Serial-I2C Surface Mount SOIC 8 5 x 4 x 1.5mm 5mm 4mm 1.5mm 5.5 V +70 °C
RS-stocknr. 124-2362
FabrikantnummerPCF8563T/5,518
FabrikantNXP
€ 0,658
Each (On a Reel of 2500)
Aantal stuks
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-stocknr. 865-2208
FabrikantnummerPCF8563T/5,518
FabrikantNXP
€ 0,683
Each (In a Pack of 10)
Aantal stuks
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-stocknr. 540-4772
FabrikantnummerDS1307Z+
FabrikantMaxim Integrated
€ 3,31
Each
Aantal stuks
Alarm, Battery Backup, Calendar, Power Fail 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 +70 °C
RS-stocknr. 923-7490
FabrikantnummerDS1307Z+T&R
FabrikantMaxim Integrated
€ 1,38
Each (On a Reel of 2500)
Aantal stuks
Battery Backup, Calendar, NV RAM YY:MM:DD HH:MM:SS 56B Serial-I2C Surface Mount SOIC 8 5 x 4 x 1.5mm 5mm 4mm 1.5mm 5.5 V +70 °C
RS-stocknr. 732-7309
FabrikantnummerDS12887A+
FabrikantMaxim Integrated
€ 9,11
Each
Aantal stuks
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-stocknr. 169-8316
FabrikantnummerDS1307Z+
FabrikantMaxim Integrated
€ 2,339
Each (In a Tube of 100)
Aantal stuks
Alarm, Battery Backup, Calendar, Power Fail 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 +70 °C
RS-stocknr. 136-0682
FabrikantnummerDS12887A+
FabrikantMaxim Integrated
€ 8,236
Each (In a Tube of 14)
Aantal stuks
- - - - - - - - - - - - - -
RS-stocknr. 786-0758
FabrikantnummerDS1338C-33#
FabrikantMaxim Integrated
€ 5,46
Each
Aantal stuks
Clock M:M:DW SS:MM:HH 56B Serial-I2C Surface Mount SOIC 16 18.1 x 7.6 x 2.35mm 18.1mm 7.6mm 2.35mm 5.5 V +85 °C
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