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 774-7403
Tillv. art.nrMCP7940M-I/P
VarumärkeMicrochip
5,935 kr
Each (In a Bag of 10)
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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 912-2774
Tillv. art.nrMCP7940N-I/SN
VarumärkeMicrochip
6,273 kr
Each (In a Tube of 100)
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 146-0203
Tillv. art.nrMCP7940M-I/P
VarumärkeMicrochip
5,482 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 798-5258
Tillv. art.nrMCP7940N-I/SN
VarumärkeMicrochip
6,876 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 817-3654
Tillv. art.nrMCP79410T-I/MS
VarumärkeMicrochip
7,964 kr
Each (On a Reel of 2500)
Enheter
Alarm, Battery Backup, Calendar, Clock DW:D:M:Y HH:MM:SS 64B Serial-2 Wire, Serial-I2C Surface Mount MSOP 8 3 x 3 x 0.95mm 3mm 3mm 0.95mm 5.5 V +85 °C
RS-artikelnummer 723-4749
Tillv. art.nrMCP79410-I/MS
VarumärkeMicrochip
8,735 kr
Each (In a Pack of 2)
Enheter
Battery Backup, Calendar, NV SRAM DW:DM:M:Y HH:MM:SS 64B Serial-I2C Surface Mount MSOP 8 3 x 3 x 0.95mm 3mm 3mm 0.95mm 5.5 V +85 °C
RS-artikelnummer 825-1076
Tillv. art.nrMCP79510-I/MS
VarumärkeMicrochip
10,444 kr
Each (In a Pack of 5)
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Calendar DW:M:Y:LY HH:MM:SS:HSS 64B Serial-SPI Surface Mount MSOP 10 3 x 3 x 0.95mm 3mm 3mm 0.95mm 3.6 V +85 °C
RS-artikelnummer 146-0213
Tillv. art.nrMCP79412-I/SN
VarumärkeMicrochip
8,324 kr
Each (In a Tube of 100)
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 803-2226
Tillv. art.nrMCP79522-I/MS
VarumärkeMicrochip
11,87 kr
Each (In a Pack of 5)
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Calendar DW:M:Y:LY HH:MM:SS:HSS 64B Serial Surface Mount MSOP 10 3 x 3 x 0.95mm 3mm 3mm 0.95mm 3.6 V +85 °C
RS-artikelnummer 823-0776
Tillv. art.nrMCP79400-I/SN
VarumärkeMicrochip
7,621 kr
Each (In a Pack of 10)
Enheter
Calendar DW:DM:M:Y HH:MM:SS 64B Serial-2 Wire, Serial-I2C Surface Mount SOIC 8 4.9 x 3.9 x 1.5mm 4.9mm 3.9mm 1.5mm 2.5 V +85 °C
RS-artikelnummer 761-7624
Tillv. art.nrMCP7940MT-I/MNY
VarumärkeMicrochip
6,142 kr
Each (On a Tape of 5)
Enheter
Calendar, NV SRAM DW:DM:M:Y HH:MM:SS 64B Serial-I2C Surface Mount TDFN 8 2 x 3 x 0.75mm 2mm 3mm 0.75mm 5.5 V +85 °C
RS-artikelnummer 177-0303
Tillv. art.nrMCP79401-I/SN
VarumärkeMicrochip
7,604 kr
Each (In a Tube of 100)
Enheter
- - HH:MM:SS - 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 146-0221
Tillv. art.nrMCP79521-I/MS
VarumärkeMicrochip
10,831 kr
Each (In a Tube of 100)
Enheter
Calendar DW:M:Y:LY HH:MM:SS:HSS 64B Serial Surface Mount MSOP 10 3 x 3 x 0.95mm 3mm 3mm 0.95mm 3.6 V +85 °C
RS-artikelnummer 177-0307
Tillv. art.nrMCP79412-I/MS
VarumärkeMicrochip
8,576 kr
Each (In a Tube of 100)
Enheter
- - HH:MM:SS - Serial-I2C Surface Mount MSOP 8 3 x 3 x 0.95mm 3mm 3mm 0.95mm 5.5 V +85 °C
RS-artikelnummer 798-5254
Tillv. art.nrMCP7940N-I/MS
VarumärkeMicrochip
7,248 kr
Each (In a Pack of 10)
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Battery Backup, Calendar DW:DM:M:Y HH:MM:SS 64B Serial-I2C Surface Mount MSOP 8 3 x 3 x 0.95mm 3mm 3mm 0.95mm 5.5 V +85 °C
RS-artikelnummer 145-9048
Tillv. art.nrMCP7940N-I/ST
VarumärkeMicrochip
6,645 kr
Each (In a Tube of 100)
Enheter
Calendar DW:D:M:Y HH:MM:SS 64B Serial-I2C Surface Mount TSSOP 8 4.5 x 3.1 x 1.05mm 4.5mm 3.1mm 1.05mm 5.5 V +85 °C
RS-artikelnummer 177-0656
Tillv. art.nrMCP79400-I/MS
VarumärkeMicrochip
7,993 kr
Each (In a Pack of 10)
Enheter
- - HH:MM:SS - Serial-I2C Surface Mount MSOP 8 3 x 3 x 0.95mm 3mm 3mm 0.95mm 5.5 V +85 °C
RS-artikelnummer 761-7627
Tillv. art.nrMCP7940M-I/SN
VarumärkeMicrochip
5,398 kr
Each (In a Pack of 5)
Enheter
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-artikelnummer 823-7954
Tillv. art.nrMCP79511-I/MS
VarumärkeMicrochip
11,146 kr
Each (In a Pack of 5)
Enheter
Calendar D:W:M:Y, LY HH, HS, MM, SS 64B Serial-SPI Surface Mount MSOP 10 3 x 3 x 0.95mm 3mm 3mm 0.95mm 3.6 V +85 °C
RS-artikelnummer 165-2097
Tillv. art.nrMCP79511-I/MS
VarumärkeMicrochip
10,135 kr
Each (In a Tube of 100)
Enheter
Calendar D:W:M:Y, LY HH, HS, MM, SS 64B Serial-SPI Surface Mount MSOP 10 3 x 3 x 0.95mm 3mm 3mm 0.95mm 3.6 V +85 °C