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 21 - 40 รายการจาก 430 รายการ / Viewing 21 - 40 of 430 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. 168-8017
หมายเลขชิ้นส่วนของผู้ผลิต / Mfr. Part No.M48T12-70PC1
THB467.49
Each (In a Tube of 14)
Units
Timekeeper SRAM D:M:Y HH:MM:SS 16kbit - Through Hole PCDIP 24 34.8 x 18.34 x 8.89mm 34.8mm 18.34mm 8.89mm 5.5 V +70 °C
RS Stock No. 786-0749
หมายเลขชิ้นส่วนของผู้ผลิต / Mfr. Part No.DS1337+
THB100.085
Each: (In a Pack of 2)
Units
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 Stock No. 190-5146
หมายเลขชิ้นส่วนของผู้ผลิต / Mfr. Part No.DS1305E+T&R
THB181.965
Each: (In a Pack of 2)
Units
Alarm, Real Time Clock, Trickle Charger DM:M:DW:Y SS:MM:HH 96B Serial-SPI Surface Mount TSSOP 20 6.6 x 4.5 x 0.95mm 6.6mm 4.5mm 0.95mm 5.5 V +70 °C
RS Stock No. 189-8339
หมายเลขชิ้นส่วนของผู้ผลิต / Mfr. Part No.DS1302N+
THB132.715
Each: (In a Pack of 2)
Units
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 Stock No. 189-8589
หมายเลขชิ้นส่วนของผู้ผลิต / Mfr. Part No.DS1388Z-33+
THB200.525
Each: (In a Pack of 2)
Units
Battery Backup, Calendar, NV RAM DW:DM:M:Y HH:MM:SS 512B Serial-I2C Surface Mount SOIC 8 5 x 4 x 1.5mm 5mm 4mm 1.5mm 3.63 V +85 °C
RS Stock No. 189-8649
หมายเลขชิ้นส่วนของผู้ผลิต / Mfr. Part No.DS1315S-5+
THB703.00
Each
Units
Battery Backup, Calendar YY:MM:DD HH:MM:SS - Parallel Surface Mount SOIC 16 10.5 x 7.6 x 2.35mm 10.5mm 7.6mm 2.35mm 5.5 V +70 °C
RS Stock No. 907-4732
หมายเลขชิ้นส่วนของผู้ผลิต / Mfr. Part No.M41ST87WMX6TR
THB253.505
Each: (In a Pack of 2)
Units
Calendar, Clock DD:MM:YY HH:MM:SS 128B Serial-I2C Surface Mount SOX 28 18.01 x 7.67 x 2.38mm 18.01mm 7.67mm 2.38mm 3.6 V +85 °C
RS Stock No. 686-5036
หมายเลขชิ้นส่วนของผู้ผลิต / Mfr. Part No.M48T58-70PC1
THB633.13
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. 189-8643
หมายเลขชิ้นส่วนของผู้ผลิต / Mfr. Part No.DS1390U-3+
THB130.20
Each: (In a Pack of 2)
Units
Trickle Charger DD:M:Y SS:MM:HH - Serial-SPI Surface Mount μMAX 10 3.05 x 3.05 x 0.95mm 3.05mm 3.05mm 0.95mm 3.3 V +85 °C
RS Stock No. 196-9064
หมายเลขชิ้นส่วนของผู้ผลิต / Mfr. Part No.ISL12022IBZ
THB132.74
Each (In a Tube of 98)
Units
- DW:DM:M:Y HH:MM:SS - - - SOIC 8 - - - - - -
RS Stock No. 190-4737
หมายเลขชิ้นส่วนของผู้ผลิต / Mfr. Part No.DS1340Z-33+T&R
THB72.663
Each (On a Reel of 2500)
Units
Real Time Clock, Trickle Charger D:D:M:Y SS:MM:HH - Serial-I2C Surface Mount SO 8 5 x 4 x 1.5mm 5mm 4mm 1.5mm 5.5 V +85 °C
RS Stock No. 189-8536
หมายเลขชิ้นส่วนของผู้ผลิต / Mfr. Part No.DS1374U-33+
THB116.83
Each: (In a Pack of 5)
Units
Battery Backup, NV RAM Binary SS 3B Serial-I2C Surface Mount μSOP 10 3.05 x 3.05 x 0.95mm 3.05mm 3.05mm 0.95mm 5.5 V +85 °C
RS Stock No. 191-3235
หมายเลขชิ้นส่วนของผู้ผลิต / Mfr. Part No.DS1374U-33+T&R
THB65.573
Each (On a Reel of 3000)
Units
Binary Counter, Real Time Clock, Trickle Charger - - - Serial-I2C Surface Mount μSOP 10 3.16 x 3.12 x 0.95mm 3.16mm 3.12mm 0.95mm 5.5 V +85 °C
RS Stock No. 190-4749
หมายเลขชิ้นส่วนของผู้ผลิต / Mfr. Part No.DS3231S#T&R
THB168.868
Each (On a Reel of 1000)
Units
Real Time Clock 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 +70 °C
RS Stock No. 170-8112
หมายเลขชิ้นส่วนของผู้ผลิต / Mfr. Part No.ISL1208IU8Z-T7A
Brand :Intersil
THB113.239
Each (On a Reel of 250)
Units
Alarm, Calendar, Clock, SRAM DW:DM:M:Y HH:MM:SS - Serial-I2C Surface Mount MSOP 8 3.05 x 3.05 x 0.95mm 3.05mm 3.05mm 0.95mm 5.5 V +85 °C
RS Stock No. 165-5488
หมายเลขชิ้นส่วนของผู้ผลิต / Mfr. Part No.M41T93RMY6F
THB91.392
Each (On a Reel of 1000)
Units
Real Time Clock DW:DM:M:Y HH:MM:SS:hh 32B Serial-4 Wire, Serial-I2C Surface Mount SOX 18 11.66 x 7.67 x 2.39mm 11.66mm 7.67mm 2.39mm 5.5 V +85 °C
RS Stock No. 190-4744
หมายเลขชิ้นส่วนของผู้ผลิต / Mfr. Part No.DS1672U-33+
THB84.403
Each (In a Tube of 50)
Units
Binary Counter, Real Time Clock - - - Serial-I2C Surface Mount μSOP 8 3.1 x 0.65 x 0.95mm 3.1mm 0.65mm 0.95mm 5.5 V +85 °C
RS Stock No. 667-6230
หมายเลขชิ้นส่วนของผู้ผลิต / Mfr. Part No.Q41454351000111
Brand :EPSON
THB132.72
Each
Units
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 Stock No. 171-0537
หมายเลขชิ้นส่วนของผู้ผลิต / Mfr. Part No.AB1815-T3
Brand :Abracon
THB54.904
Each: (In a Pack of 5)
Units
- - - - - Surface Mount 16-VFQFN - - - - - - 85 °C
RS Stock No. 168-6813
หมายเลขชิ้นส่วนของผู้ผลิต / Mfr. Part No.M41T00SM6F
THB59.115
Each (On a Reel of 2500)
Units
- DW:DM:M:Y HH:MM:SS 8B Serial-2 Wire, Serial-I2C Surface Mount SOIC 8 5 x 4 x 1.25mm 5mm 4mm 1.25mm 5.5 V +85 °C