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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กำลังดูสินค้า 1 - 20 รายการจาก 447 รายการ / Viewing 1 - 20 of 447 products
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รายละเอียดสินค้า / Description ราคา / Price 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 Stock No. 865-2208
หมายเลขชิ้นส่วนของผู้ผลิต / Mfr. Part No.PCF8563T/5,518
Brand :NXP
THB30.513
Each: (In a Pack of 10)
Units
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 Stock No. 124-2362
หมายเลขชิ้นส่วนของผู้ผลิต / Mfr. Part No.PCF8563T/5,518
Brand :NXP
THB17.441
Each (On a Reel of 2500)
Units
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 Stock No. 912-6943
หมายเลขชิ้นส่วนของผู้ผลิต / Mfr. Part No.MCP7940M-I/SN
Brand :Microchip
THB23.953
Each (In a Tube of 100)
Units
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 Stock No. 761-7627
หมายเลขชิ้นส่วนของผู้ผลิต / Mfr. Part No.MCP7940M-I/SN
Brand :Microchip
THB22.01
Each: (In a Pack of 5)
Units
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 Stock No. 904-7512
หมายเลขชิ้นส่วนของผู้ผลิต / Mfr. Part No.X1B000311000112
Brand :EPSON
THB186.05
Each
Units
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 Stock No. 166-0790
หมายเลขชิ้นส่วนของผู้ผลิต / Mfr. Part No.M41T65Q6F
THB44.714
Each (On a Reel of 3000)
Units
Alarm, Battery Backup, Calendar, Watchdog Timer DW:DM:M:Y HH:MM:SS:hh 16B Serial-I2C Surface Mount QFN 16 3 x 3 x 0.88mm 3mm 3mm 0.88mm 4.4 V +85 °C
RS Stock No. 169-8222
หมายเลขชิ้นส่วนของผู้ผลิต / Mfr. Part No.X1B000311000112
Brand :EPSON
THB146.109
Each (On a Tape of 20)
Units
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 Stock No. 578-831
หมายเลขชิ้นส่วนของผู้ผลิต / Mfr. Part No.M41T65Q6F
THB88.962
Each: (In a Pack of 5)
Units
Alarm, Battery Backup, Calendar, Watchdog Timer DW:DM:M:Y HH:MM:SS:hh 16B Serial-I2C Surface Mount QFN 16 3 x 3 x 0.88mm 3mm 3mm 0.88mm 4.4 V +85 °C
RS Stock No. 169-8141
หมายเลขชิ้นส่วนของผู้ผลิต / Mfr. Part No.Q41856471000111
Brand :EPSON
THB224.867
Each (On a Reel of 250)
Units
Alarm, Calendar, Timer DW:DM:M:Y HH:MM:SS - Serial-I2C Surface Mount VSOJ 20 - 7mm 5.4mm - 5.5 V +85 °C
RS Stock No. 727-5743
หมายเลขชิ้นส่วนของผู้ผลิต / Mfr. Part No.PCA8565TS/1,118
Brand :NXP
THB67.53
Each: (In a Pack of 2)
Units
Alarm, Calendar, Interrupt, Timer DW:DM:M:Y HH:MM:SS - Serial-I2C Surface Mount TSSOP 8 3.1 x 3.1 x 0.95mm 3.1mm 3.1mm 0.95mm 5.5 V +125 °C
RS Stock No. 714-7298
หมายเลขชิ้นส่วนของผู้ผลิต / Mfr. Part No.M48T18-100PC1
THB856.34
Each
Units
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 Stock No. 667-6252
หมายเลขชิ้นส่วนของผู้ผลิต / Mfr. Part No.Q41856471000111
Brand :EPSON
THB173.81
Each
Units
Alarm, Calendar, Timer DW:DM:M:Y HH:MM:SS - Serial-I2C Surface Mount VSOJ 20 - 7mm 5.4mm - 5.5 V +85 °C
RS Stock No. 166-0314
หมายเลขชิ้นส่วนของผู้ผลิต / Mfr. Part No.PCA8565TS/1,118
Brand :NXP
THB44.392
Each (On a Reel of 2500)
Units
Alarm, Calendar, Interrupt, Timer DW:DM:M:Y HH:MM:SS - Serial-I2C Surface Mount TSSOP 8 3.1 x 3.1 x 0.95mm 3.1mm 3.1mm 0.95mm 5.5 V +125 °C
RS Stock No. 919-6337
หมายเลขชิ้นส่วนของผู้ผลิต / Mfr. Part No.M48T18-100PC1
THB790.124
Each (In a Tube of 12)
Units
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 Stock No. 189-9414
หมายเลขชิ้นส่วนของผู้ผลิต / Mfr. Part No.DS1302Z+
THB156.22
Each: (In a Pack of 5)
Units
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 +70 °C
RS Stock No. 813-5775
หมายเลขชิ้นส่วนของผู้ผลิต / Mfr. Part No.RV-3029-C3-TB-QA-Opt.B
Brand :Micro Crystal
THB313.31
Each
Units
Alarm, Battery Backup, Calendar, Clock D:W:M:Y HH:MM:SS 8B Serial-2 Wire, Serial-I2C Surface Mount SON 10 3.7 x 2.5 x 0.9mm 3.7mm 2.5mm 0.9mm 5.5 V +85 °C
RS Stock No. 192-1449
หมายเลขชิ้นส่วนของผู้ผลิต / Mfr. Part No.DS1685E-3+
THB256.85
Each: (In a Pack of 2)
Units
Alarm, Calendar YY:MM:DD HH:MM:SS 128B Multiplexed Surface Mount TSSOP 24 7.9 x 4.5 x 0.95mm 7.9mm 4.5mm 0.95mm 5 V +70 °C
RS Stock No. 190-4733
หมายเลขชิ้นส่วนของผู้ผลิต / Mfr. Part No.DS1339BU+
THB140.963
Each (In a Tube of 50)
Units
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 Stock No. 189-8635
หมายเลขชิ้นส่วนของผู้ผลิต / Mfr. Part No.DS1337S+
THB125.706
Each: (In a Pack of 5)
Units
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
ใหม่ / New
RS Stock No. 219-4632
หมายเลขชิ้นส่วนของผู้ผลิต / Mfr. Part No.PCF2129AT/2,518
Brand :NXP
THB113.231
Each (On a Reel of 2000)
Units
- D:W:M:Y SS:MM:HH 128bit Serial-SPI - SO20 20 - - - - - -