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. 786-0758
FabrikantnummerDS1338C-33#
FabrikantMaxim
€ 5,06
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
RS-stocknr. 165-9387
FabrikantnummerDS1338C-33#
FabrikantMaxim
€ 4,421
Each (In a Tube of 46)
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
RS-stocknr. 624-8466
FabrikantnummerM48T35Y-70PC1
€ 22,48
Each
Aantal stuks
Battery Backup, Calendar, Chip Deselect, Switch Over, Write Protection DW:DM:M:Y HH:MM:SS 32768B 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. 169-8138
FabrikantnummerQ41454351000200
FabrikantEPSON
€ 2,285
Each (In a Tube of 25)
Aantal stuks
Calendar DW:DM:M:Y HH:MM:SS - Serial Surface Mount SOP 14 10.1 x 5 x 3.15mm 10.1mm 5mm 3.15mm 5.5 V +85 °C
RS-stocknr. 667-6234
FabrikantnummerQ41454351000200
FabrikantEPSON
€ 2,51
Each
Aantal stuks
Calendar DW:DM:M:Y HH:MM:SS - Serial Surface Mount SOP 14 10.1 x 5 x 3.15mm 10.1mm 5mm 3.15mm 5.5 V +85 °C
RS-stocknr. 920-9001
FabrikantnummerM48T35Y-70PC1
€ 20,439
Each (In a Tube of 12)
Aantal stuks
Battery Backup, Calendar, Chip Deselect, Switch Over, Write Protection DW:DM:M:Y HH:MM:SS 32768B 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. 103-9915
FabrikantnummerDS3231S#
FabrikantMaxim
€ 6,665
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 +70 °C
RS-stocknr. 102-3553
FabrikantnummerM41T81M6F
€ 1,035
Each (On a Reel of 2500)
Aantal stuks
Alarm Binary HH:MM:SS:hh 20B Serial Surface Mount SOIC 8 5 x 4 x 1.25mm 5mm 4mm 1.25mm 5.5 V +85 °C
RS-stocknr. 727-5743
FabrikantnummerPCA8565TS/1,118
FabrikantNXP
€ 1,41
Each (In a Pack of 2)
Aantal stuks
Alarm, Calendar, Interrupt, Timer DW:DM:M:Y HH:MM:SS - Serial-I2C Surface Mount TSSOP 8 3.1 x 3.1 x 0.95mm 3.1mm 3.1mm 0.95mm 5.5 V +125 °C
RS-stocknr. 732-7573
FabrikantnummerDS3231S#
FabrikantMaxim
€ 7,66
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 +70 °C
RS-stocknr. 809-1420
FabrikantnummerM41T81M6F
€ 2,252
Each (In a Pack of 5)
Aantal stuks
Alarm Binary HH:MM:SS:hh 20B Serial Surface Mount SOIC 8 5 x 4 x 1.25mm 5mm 4mm 1.25mm 5.5 V +85 °C
RS-stocknr. 166-0314
FabrikantnummerPCA8565TS/1,118
FabrikantNXP
€ 0,686
Each (On a Reel of 2500)
Aantal stuks
Alarm, Calendar, Interrupt, Timer DW:DM:M:Y HH:MM:SS - Serial-I2C Surface Mount TSSOP 8 3.1 x 3.1 x 0.95mm 3.1mm 3.1mm 0.95mm 5.5 V +125 °C
RS-stocknr. 540-2710
FabrikantnummerDS1306+
FabrikantMaxim
€ 5,14
Each
Aantal stuks
Alarm, Battery Backup, Calendar DW:DM:M:Y HH:MM:SS 96B Serial-SPI Through Hole PDIP 16 19.43 x 7.87 x 4.45mm 19.43mm 7.87mm 4.45mm 5.5 V +70 °C
RS-stocknr. 146-0991
FabrikantnummerDS1306+
FabrikantMaxim
€ 4,487
Each (In a Tube of 25)
Aantal stuks
Alarm, Battery Backup, Calendar DW:DM:M:Y HH:MM:SS 96B Serial-SPI Through Hole PDIP 16 19.43 x 7.87 x 4.45mm 19.43mm 7.87mm 4.45mm 5.5 V +70 °C
RS-stocknr. 829-0355
FabrikantnummerM41T81SM6F
€ 2,252
Each (In a Pack of 5)
Aantal stuks
Calendar D:D:M:Y:C HH:MM:SS:HSS 20B Serial-I2C Surface Mount SOIC 8 5 x 4 x 1.5mm 5mm 4mm 1.5mm 5.5 V +85 °C
RS-stocknr. 169-8137
FabrikantnummerQ41454351000111
FabrikantEPSON
€ 2,667
Each (On a Reel of 250)
Aantal stuks
Calendar, Timer - - - Serial Surface Mount SOP 14 5 x 10.1 x 3.2mm 5mm 10.1mm 3.2mm 5.5 V +85 °C
RS-stocknr. 667-6221
FabrikantnummerQ42724231000611
FabrikantEPSON
€ 6,99
Each
Aantal stuks
Calendar, Timer - - - Serial-I2C Surface Mount SOP 24 16.3 x 7.9 x 2.8mm 16.3mm 7.9mm 2.8mm 5.5 V +85 °C
RS-stocknr. 920-8991
FabrikantnummerM48T58Y-70PC1
€ 13,874
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. 761-7627
FabrikantnummerMCP7940M-I/SN
FabrikantMicrochip
€ 0,54
Each (In a Pack of 5)
Aantal stuks
Calendar, NV SRAM DW:DM:M:Y HH:MM:SS 64B Serial-I2C Surface Mount SOIC 8 4.9 x 3.9 x 1.25mm 4.9mm 3.9mm 1.25mm 5.5 V +85 °C
RS-stocknr. 920-9133
FabrikantnummerM41T81SM6F
€ 1,021
Each (On a Reel of 2500)
Aantal stuks
Calendar D:D:M:Y:C HH:MM:SS:HSS 20B 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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