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
RS 제품 번호 169-8316
제조사 부품 번호DS1307Z+
제조사Maxim Integrated
₩3,264.30
Each (In a Tube of 100)
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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 제품 번호 667-6278
제조사 부품 번호Q41802551000111
제조사EPSON
₩5,837.30
Each
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Alarm, Calendar, Timer - - - Serial-I2C Surface Mount SOP 14 5 x 10.1 x 3.2mm 5mm 10.1mm 3.2mm 5.5 V +85 °C
RS 제품 번호 686-5030
제조사 부품 번호M48T58Y-70PC1
₩22,278.15
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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 제품 번호 169-8144
제조사 부품 번호Q41802551000111
제조사EPSON
₩3,980.40
Each (On a Reel of 250)
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Alarm, Calendar, Timer - - - Serial-I2C Surface Mount SOP 14 5 x 10.1 x 3.2mm 5mm 10.1mm 3.2mm 5.5 V +85 °C
RS 제품 번호 920-8991
제조사 부품 번호M48T58Y-70PC1
₩20,480.15
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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 제품 번호 540-4772
제조사 부품 번호DS1307Z+
제조사Maxim Integrated
₩4,515.15
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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 제품 번호 923-7490
제조사 부품 번호DS1307Z+T&R
제조사Maxim Integrated
₩2,126.60
Each (On a Reel of 2500)
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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 제품 번호 761-9759
제조사 부품 번호DS1307Z+T&R
제조사Maxim Integrated
₩3,070.55
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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 제품 번호 729-3243
제조사 부품 번호RV-2123-C2-TA-010
제조사Micro Crystal
₩7,536.10
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Calendar DW:DM:M:Y HH:MM:SS - Serial-SPI Surface Mount SON 10 5 x 3.2 x 1.2mm 5mm 3.2mm 1.2mm 5.5 V +85 °C
RS 제품 번호 667-6212
제조사 부품 번호Q42724211000200
제조사EPSON
₩10,857.75
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Calendar DW:DM:M:Y HH:MM:SS - Parallel Through Hole PDIP 18 23.1 x 6.3 x 4.2mm 23.1mm 6.3mm 4.2mm 5.5 V +70 °C
RS 제품 번호 103-9916
제조사 부품 번호DS3231SN#
제조사Maxim Integrated
₩11,304.15
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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 제품 번호 732-7318
제조사 부품 번호DS1302S+
제조사Maxim Integrated
₩5,082.45
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Battery Backup, Calendar, NV RAM DW:DM:M:Y HH:MM:SS 31B Serial Surface Mount SOIC 8 5.46 x 5.41 x 2.03mm 5.46mm 5.41mm 2.03mm 5.5 V +70 °C
RS 제품 번호 146-1083
제조사 부품 번호DS1305N+
제조사Maxim Integrated
₩6,830.85
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Alarm, Trickle Charger YY:MM:DD 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 +85 °C
RS 제품 번호 904-7512
제조사 부품 번호X1B000311000112
제조사EPSON
₩6,558.05
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Clock - SS:HH 32bit Serial-I2C Surface Mount - 10 3.2 x 2.5 x 1mm 3.2mm 2.5mm 1mm 5.5 V +85 °C
RS 제품 번호 778-1484
제조사 부품 번호DS3231MZ+
제조사Maxim Integrated
₩9,495.30
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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 제품 번호 169-8137
제조사 부품 번호Q41454351000111
제조사EPSON
₩3,639.40
Each (On a Reel of 250)
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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 제품 번호 786-0742
제조사 부품 번호DS1302N+
제조사Maxim Integrated
₩4,936.75
Each (In a Pack of 2)
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Trickle Charger DM:M:DW:Y SS:MM:HH 31B Serial-3 Wire 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 165-9241
제조사 부품 번호DS1302S+
제조사Maxim Integrated
₩3,689.00
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Battery Backup, Calendar, NV RAM DW:DM:M:Y HH:MM:SS 31B Serial Surface Mount SOIC 8 5.46 x 5.41 x 2.03mm 5.46mm 5.41mm 2.03mm 5.5 V +70 °C
RS 제품 번호 169-8222
제조사 부품 번호X1B000311000112
제조사EPSON
₩6,173.65
Each (On a Tape of 20)
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Clock - SS:HH 32bit Serial-I2C Surface Mount - 10 3.2 x 2.5 x 1mm 3.2mm 2.5mm 1mm 5.5 V +85 °C
RS 제품 번호 797-9436
제조사 부품 번호DS1305N+
제조사Maxim Integrated
₩8,565.30
Each
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Alarm, Trickle Charger YY:MM:DD 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 +85 °C