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 761-9771
제조사 부품 번호DS1302Z+T&R
제조사Maxim Integrated
₩4,460.90
Each
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Battery Backup, Calendar, NV RAM YY:MM:DD HH:MM:SS 31B Serial-3 Wire Surface Mount SOIC 8 5 x 4 x 1.5mm 5mm 4mm 1.5mm 5.5 V +70 °C
RS 제품 번호 191-4238
제조사 부품 번호DS12885S+
제조사Maxim Integrated
₩9,579.00
Each (In a Tube of 30)
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Alarm, Calendar, Clock - HH:MM:SS 144B Multiplexed Surface Mount SOIC 24 15.6 x 7.6 x 2.35mm 15.6mm 7.6mm 2.35mm 5.5 V +70 °C
RS 제품 번호 146-0203
제조사 부품 번호MCP7940M-I/P
제조사Microchip
₩792.05
Each (In a Tube of 60)
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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 제품 번호 177-0837
제조사 부품 번호MCP7940N-E/SN
제조사Microchip
₩1,083.45
Each (In a Pack of 10)
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- D:M:Y, DW 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 +125 °C
RS 제품 번호 518-299
제조사 부품 번호ISL12026IBZ
제조사Intersil
₩4,429.90
Each
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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 190-5179
제조사 부품 번호DS1683S+
제조사Maxim Integrated
₩6,187.60
Each (In a Pack of 2)
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Alarm, SRAM - - - Serial-I2C Surface Mount SO 8 5 x 4 x 1.5mm 5mm 4mm 1.5mm 5.5 V +85 °C
RS 제품 번호 159-7453
제조사 부품 번호MCP795W21-I/ST
제조사Microchip
₩2,162.25
Each (In a Tube of 96)
수량
Calendar DW:M:Y:LY HH:MM:SS:HSS 64B Serial Surface Mount SOIC 14 8.65 x 3.9 x 1.25mm 8.65mm 3.9mm 1.25mm 3.6 V +85 °C
RS 제품 번호 146-1241
제조사 부품 번호DS2417P+
제조사Maxim Integrated
₩2,387.00
Each (In a Tube of 120)
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Battery Backup, Calendar, ROM Binary Binary - Serial Surface Mount TSOC 6 4 x 3.89 x 1.5mm 4mm 3.89mm 1.5mm 5.5 V +85 °C
RS 제품 번호 732-7315
제조사 부품 번호DS1302ZN+
제조사Maxim Integrated
₩5,477.70
Each
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Calendar, NV RAM, Trickle Charger DW:DM:M:Y HH:MM:SS 31B Serial Surface Mount SOIC 8 5 x 4 x 1.5mm 5mm 4mm 1.5mm 5.5 V +85 °C
RS 제품 번호 189-8548
제조사 부품 번호DS1307Z+T&R
제조사Maxim Integrated
₩4,147.80
Each (In a Pack of 5)
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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 189-8627
제조사 부품 번호DS1306+
제조사Maxim Integrated
₩8,292.50
Each (In a Pack of 2)
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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 제품 번호 190-5835
제조사 부품 번호DS1339C-33#T&R
제조사Maxim Integrated
₩7,136.20
Each (In a Pack of 2)
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Alarm, Clock, Real Time Clock, Square Wave Output, Trickle Charger DM:M:DW:Y SS:MM:HH - Serial-I2C Surface Mount SO 16 10.5 x 7.6 x 2.35mm 10.5mm 7.6mm 2.35mm 5.5 V +85 °C
RS 제품 번호 171-0195
제조사 부품 번호AB0805-T3
제조사Abracon
₩1,077.25
Each (On a Reel of 3000)
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- - - - - Surface Mount 16-VFQFN - - - - - - 85 °C
RS 제품 번호 920-9001
제조사 부품 번호M48T35Y-70PC1
₩30,691.55
Each (In a Tube of 12)
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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 제품 번호 189-7238
제조사 부품 번호DS1391U-33+
제조사Maxim Integrated
₩4,205.15
Each (In a Tube of 50)
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Battery Backup, Calendar, NV SRAM 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 191-5742
제조사 부품 번호DS1687-3+
제조사Maxim Integrated
₩18,065.25
Each
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NV SRAM, Real Time Clock - - 242B Multiplexed Surface Mount EDIP 24 1.34 x 0.72 x 0.37mm 1.34mm 0.72mm 0.37mm 5.5 V +70 °C
RS 제품 번호 191-4210
제조사 부품 번호DS3231MPMB1#
제조사Maxim Integrated
₩28,506.05
Each
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Real Time Clock - - - Serial-I2C Surface Mount - 6 - - - - - +85 °C
RS 제품 번호 786-0758
제조사 부품 번호DS1338C-33#
제조사Maxim Integrated
₩7,957.70
Each
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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
신제품
RS 제품 번호 196-9069
제조사 부품 번호ISL1208IB8Z-TK
₩1,798.00
Each (On a Reel of 1000)
수량
- DW:DM:M:Y HH:MM:SS - - - SOIC 8 - - - - - -
RS 제품 번호 169-8145
제조사 부품 번호Q418564C2000511
제조사EPSON
₩4,202.05
Each (On a Reel of 250)
수량
Alarm, Calendar, Timer DW:DM:M:Y HH:MM:SS - Serial-I2C Surface Mount VSOJ 12 - 3.6mm 2.4mm - 5.5 V +85 °C