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, an 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 facilitates the performance of the software functions that are time dependant.

Designed to run on ultra-low power consumption, RTCs often run on a lithium battery source but can also run on 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 686-5030
제조사 부품 번호M48T58Y-70PC1
₩33,585.40
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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 667-6278
제조사 부품 번호Q41802551000111
제조사EPSON
₩5,119.65
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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
₩30,972.10
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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
₩4,056.35
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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 667-6212
제조사 부품 번호Q42724211000200
제조사EPSON
₩9,530.95
Each
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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 169-8137
제조사 부품 번호Q41454351000111
제조사EPSON
₩3,710.70
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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 904-7512
제조사 부품 번호X1B000311000112
제조사EPSON
₩7,037.00
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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 667-6230
제조사 부품 번호Q41454351000111
제조사EPSON
₩4,997.20
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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 169-8134
제조사 부품 번호Q42724211000200
제조사EPSON
₩7,316.00
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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 169-8222
제조사 부품 번호X1B000311000112
제조사EPSON
₩5,412.60
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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 124-2362
제조사 부품 번호PCF8563T/5,518
제조사NXP
₩863.35
Each (On a Reel of 2500)
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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 제품 번호 865-2208
제조사 부품 번호PCF8563T/5,518
제조사NXP
₩1,351.60
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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 제품 번호 729-3243
제조사 부품 번호RV-2123-C2-TA-010
제조사Micro Crystal
₩14,207.30
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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 171-1647
제조사 부품 번호RV-2123-C2-TA-010
제조사Micro Crystal
₩10,584.95
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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 518-299
제조사 부품 번호ISL12026IBZ
제조사Intersil
₩5,539.70
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Alarm, Battery Backup, Calendar, Switch Over DW:DM:M:Y HH:MM:SS 512B Serial-I2C Surface Mount SOIC 8 5 x 4 x 1.5mm 5mm 4mm 1.5mm 5.5 V +85 °C
RS 제품 번호 667-6243
제조사 부품 번호Q41457451000200
제조사EPSON
₩4,329.15
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Alarm, 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 169-8324
제조사 부품 번호CDP68HC68T1MZ
제조사Intersil
₩16,512.15
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Alarm, Battery Backup, Calendar, Watchdog Timer DW:DM:M:Y HH:MM:SS 32B Serial-SPI Surface Mount SOIC W 20 13 x 7.6 x 2.35mm 13mm 7.6mm 2.35mm 6 V +85 °C
RS 제품 번호 732-7573
제조사 부품 번호DS3231S#
제조사Maxim Integrated
₩13,850.80
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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 +70 °C
RS 제품 번호 171-1643
제조사 부품 번호RV-8564-C2-TA-010
제조사Micro Crystal
₩7,920.50
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Calendar DW:DM:M:Y HH:MM:SS - Serial-I2C Surface Mount SON 10 5 x 3.2 x 1.2mm 5mm 3.2mm 1.2mm 5.5 V +85 °C
RS 제품 번호 190-5127
제조사 부품 번호DS1388Z-33+T&R
제조사Maxim Integrated
₩10,329.20
Each (In a Pack of 2)
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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