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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제품설명 단가 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
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RS 제품 번호 205-3454
제조사 부품 번호X1B000242000112
제조사Epson
₩1,684.85
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Real Time Clock - - 128bit - - SOP-14 14 - - - - - -
RS 제품 번호 912-6943
제조사 부품 번호MCP7940M-I/SN
제조사Microchip
₩678.90
Each (In a Tube of 100)
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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 제품 번호 189-7236
제조사 부품 번호DS1390U-33+
제조사Maxim Integrated
₩4,344.65
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Battery Backup, Calendar, NV RAM DW:DM:M:Y HH:MM:SS - Serial-SPI Surface Mount μSOP 10 3.05 x 3.05 x 0.95mm 3.05mm 3.05mm 0.95mm 5.5 V +85 °C
RS 제품 번호 190-4741
제조사 부품 번호DS1388Z-33+T&R
제조사Maxim Integrated
₩3,441.00
Each (On a Reel of 2500)
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Real Time Clock, Trickle Charger D:D:M:Y - - Serial-I2C Surface Mount SO 8 5 x 4 x 1.5mm 5mm 4mm 1.5mm 3.63 V +85 °C
RS 제품 번호 165-2125
제조사 부품 번호MCP7940N-I/P
제조사Microchip
₩995.10
Each (In a Tube of 60)
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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 제품 번호 190-6090
제조사 부품 번호DS1904L-F5#
제조사Maxim Integrated
₩10,437.70
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- - - - - - - - - - - - - -
RS 제품 번호 920-9010
제조사 부품 번호M41T60Q6F
₩1,075.70
Each (On a Reel of 3000)
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Battery Backup, Calendar DW:DM:M:Y HH:MM:SS 8B Serial-I2C Surface Mount QFN 16 3 x 3 x 0.88mm 3mm 3mm 0.88mm 4.4 V +85 °C
RS 제품 번호 190-5152
제조사 부품 번호DS1347T+T&R
제조사Maxim Integrated
₩4,154.00
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Alarm, Real Time Clock, SRAM DM:M:Y:C SS:MM:HH - - Surface Mount TDFN-EP 8 3.1 x 3.1 x 0.8mm 3.1mm 3.1mm 0.8mm 5.5 V +85 °C
RS 제품 번호 190-5806
제조사 부품 번호DS1339BU+
제조사Maxim Integrated
₩5,338.20
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Real Time Clock D:D:M:Y HH:MM:SS - Serial-I2C Surface Mount μSOP 8 3.1 x 3.1 x 0.95mm 3.1mm 3.1mm 0.95mm 5.5 V +85 °C
RS 제품 번호 189-8635
제조사 부품 번호DS1337S+
제조사Maxim Integrated
₩3,991.25
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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 제품 번호 189-7213
제조사 부품 번호DS1307N+
제조사Maxim Integrated
₩4,482.60
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Clock DM:M:DW:Y SS:MM:HH 56B Serial-I2C Through Hole PDIP 8 9.91 x 7.87 x 4.45mm 9.91mm 7.87mm 4.45mm 5.5 V +85 °C
RS 제품 번호 145-9302
제조사 부품 번호M41T0M6F
₩1,112.90
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Real Time Clock DW:DM:M:Y HH:MM:SS 8B Serial-2 Wire, Serial-I2C Surface Mount SOIC 8 5 x 4 x 1.5mm 5mm 4mm 1.5mm 5.5 V +85 °C
RS 제품 번호 912-2774
제조사 부품 번호MCP7940N-I/SN
제조사Microchip
₩861.80
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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
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RS 제품 번호 205-3457
제조사 부품 번호X1B000311000112
제조사Epson
₩1,773.20
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Real Time Clock - - - - - 3.2x2.5 ceramic package 10 - - - - - -
RS 제품 번호 192-1551
제조사 부품 번호DS1744W-120+
제조사Maxim Integrated
₩36,570.70
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Calendar YY:MM:DD HH:MM:SS 32 x 8B Parallel Through Hole EDIP 28 39.37 x 18.8 x 10.67mm 39.37mm 18.8mm 10.67mm 0.6 V, 3.6 V +70 °C
RS 제품 번호 189-8698
제조사 부품 번호DS1337+
제조사Maxim Integrated
₩4,152.45
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Clock DD:M:Y SS:MM:HH 7B Serial-I2C Through Hole PDIP 8 9.91 x 7.87 x 4.45mm 9.91mm 7.87mm 4.45mm 5.5 V +85 °C
RS 제품 번호 729-3221
제조사 부품 번호RV-3049-C2-TB-008
제조사Micro Crystal
₩20,408.85
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Battery Backup, Calendar, NV RAM DW:DM:M:Y HH:MM:SS 8B Serial-SPI Surface Mount SON 10 5 x 3.2 x 1.2mm 5mm 3.2mm 1.2mm 5.5 V +125 °C
RS 제품 번호 189-8368
제조사 부품 번호DS3234S#
제조사Maxim Integrated
₩11,394.05
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SRAM DD:M:Y SS:MM:HH 256B Serial-SPI Surface Mount SOIC 20 13 x 7.6 x 2.35mm 13mm 7.6mm 2.35mm 5.5 V +70 °C
RS 제품 번호 192-1456
제조사 부품 번호DS12C887A+
제조사Maxim Integrated
₩13,046.35
Each
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Alarm, Calendar YY:MM:DD HH:MM:SS 128B Multiplexed Through Hole EDIP 24 38.1 x 18.29 x 10.67mm 38.1mm 18.29mm 10.67mm 5.5 V +85 °C
RS 제품 번호 921-5721
제조사 부품 번호ISL12020MIRZ
₩8,368.45
Each (In a Pack of 2)
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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