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 49 รายการ / Viewing 1 - 20 of 49 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. 761-7627
หมายเลขชิ้นส่วนของผู้ผลิต / Mfr. Part No.MCP7940M-I/SN
Brand :Microchip
THB20.576
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. 912-6943
หมายเลขชิ้นส่วนของผู้ผลิต / Mfr. Part No.MCP7940M-I/SN
Brand :Microchip
THB19.871
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. 177-0302
หมายเลขชิ้นส่วนของผู้ผลิต / Mfr. Part No.MCP79400-I/MS
Brand :Microchip
THB29.098
Each (In a Tube of 100)
Units
- D:M:Y, DW HH:MM:SS - Serial-I2C Surface Mount MSOP 8 3 x 3 x 0.95mm 3mm 3mm 0.95mm 5.5 V +85 °C
RS Stock No. 774-7403
หมายเลขชิ้นส่วนของผู้ผลิต / Mfr. Part No.MCP7940M-I/P
Brand :Microchip
THB23.063
Each (In a Bag of 10)
Units
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 Stock No. 177-0308
หมายเลขชิ้นส่วนของผู้ผลิต / Mfr. Part No.MCP795W10-I/SL
Brand :Microchip
THB51.534
Each (In a Tube of 57)
Units
- D:M:Y, DW HH:MM:SS - Serial-SPI Surface Mount SOIC 14 8.65 x 3.9 x 1.5mm 8.65mm 3.9mm 1.5mm 3.6 V +85 °C
RS Stock No. 823-3712
หมายเลขชิ้นส่วนของผู้ผลิต / Mfr. Part No.MCP7940N-I/ST
Brand :Microchip
THB26.617
Each: (In a Pack of 10)
Units
Calendar DW:D:M:Y HH:MM:SS 64B Serial-I2C Surface Mount TSSOP 8 4.5 x 3.1 x 1.05mm 4.5mm 3.1mm 1.05mm 5.5 V +85 °C
RS Stock No. 177-0776
หมายเลขชิ้นส่วนของผู้ผลิต / Mfr. Part No.MCP79401-I/SN
Brand :Microchip
THB30.517
Each: (In a Pack of 10)
Units
- 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 +85 °C
RS Stock No. 798-5267
หมายเลขชิ้นส่วนของผู้ผลิต / Mfr. Part No.MCP79411-I/SN
Brand :Microchip
THB36.459
Each: (In a Pack of 10)
Units
Battery Backup, Calendar DW:DM:M:Y HH:MM:SS 64B Serial-I2C Surface Mount SOIC 8 4.9 x 3.9 x 1.5mm 4.9mm 3.9mm 1.5mm 5.5 V +85 °C
RS Stock No. 146-0221
หมายเลขชิ้นส่วนของผู้ผลิต / Mfr. Part No.MCP79521-I/MS
Brand :Microchip
THB43.646
Each (In a Tube of 100)
Units
Calendar DW:M:Y:LY HH:MM:SS:HSS 64B Serial Surface Mount MSOP 10 3 x 3 x 0.95mm 3mm 3mm 0.95mm 3.6 V +85 °C
RS Stock No. 823-0776
หมายเลขชิ้นส่วนของผู้ผลิต / Mfr. Part No.MCP79400-I/SN
Brand :Microchip
THB28.034
Each: (In a Pack of 10)
Units
Calendar DW:DM:M:Y HH:MM:SS 64B Serial-2 Wire, Serial-I2C Surface Mount SOIC 8 4.9 x 3.9 x 1.5mm 4.9mm 3.9mm 1.5mm 2.5 V +85 °C
RS Stock No. 723-4749
หมายเลขชิ้นส่วนของผู้ผลิต / Mfr. Part No.MCP79410-I/MS
Brand :Microchip
THB35.15
Each: (In a Pack of 2)
Units
Battery Backup, Calendar, NV SRAM DW:DM:M:Y HH:MM:SS 64B Serial-I2C Surface Mount MSOP 8 3 x 3 x 0.95mm 3mm 3mm 0.95mm 5.5 V +85 °C
RS Stock No. 803-2187
หมายเลขชิ้นส่วนของผู้ผลิต / Mfr. Part No.MCP79521-I/MS
Brand :Microchip
THB43.65
Each: (In a Pack of 5)
Units
Calendar DW:M:Y:LY HH:MM:SS:HSS 64B Serial Surface Mount MSOP 10 3 x 3 x 0.95mm 3mm 3mm 0.95mm 3.6 V +85 °C
RS Stock No. 825-1164
หมายเลขชิ้นส่วนของผู้ผลิต / Mfr. Part No.MCP79411-I/MS
Brand :Microchip
THB34.422
Each: (In a Pack of 10)
Units
Calendar DW:DM:M:Y HH:MM:SS 64B Serial-2 Wire, Serial-I2C Surface Mount MSOP 8 3 x 3 x 0.95mm 3mm 3mm 0.95mm 5.5 V +85 °C
RS Stock No. 823-7954
หมายเลขชิ้นส่วนของผู้ผลิต / Mfr. Part No.MCP79511-I/MS
Brand :Microchip
THB40.804
Each: (In a Pack of 5)
Units
Calendar D:W:M:Y, LY HH, HS, MM, SS 64B Serial-SPI Surface Mount MSOP 10 3 x 3 x 0.95mm 3mm 3mm 0.95mm 3.6 V +85 °C
RS Stock No. 817-3651
หมายเลขชิ้นส่วนของผู้ผลิต / Mfr. Part No.MCP79410T-I/MNY
Brand :Microchip
THB33.502
Each (On a Reel of 3300)
Units
Alarm, Battery Backup, Calendar, Clock DW:D:M:Y HH:MM:SS 64B Serial-2 Wire, Serial-I2C Surface Mount TDFN 8 2 x 3 x 0.75mm 2mm 3mm 0.75mm 5.5 V +85 °C
RS Stock No. 177-0305
หมายเลขชิ้นส่วนของผู้ผลิต / Mfr. Part No.MCP7940N-E/SN
Brand :Microchip
THB27.323
Each (In a Tube of 100)
Units
- 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 Stock No. 177-0656
หมายเลขชิ้นส่วนของผู้ผลิต / Mfr. Part No.MCP79400-I/MS
Brand :Microchip
THB29.098
Each: (In a Pack of 10)
Units
- D:M:Y, DW HH:MM:SS - Serial-I2C Surface Mount MSOP 8 3 x 3 x 0.95mm 3mm 3mm 0.95mm 5.5 V +85 °C
RS Stock No. 912-6738
หมายเลขชิ้นส่วนของผู้ผลิต / Mfr. Part No.MCP79411-I/SN
Brand :Microchip
THB33.595
Each (In a Tube of 100)
Units
Battery Backup, Calendar DW:DM:M:Y HH:MM:SS 64B Serial-I2C Surface Mount SOIC 8 4.9 x 3.9 x 1.5mm 4.9mm 3.9mm 1.5mm 5.5 V +85 °C
RS Stock No. 177-0307
หมายเลขชิ้นส่วนของผู้ผลิต / Mfr. Part No.MCP79412-I/MS
Brand :Microchip
THB34.42
Each (In a Tube of 100)
Units
- D:M:Y, DW HH:MM:SS - Serial-I2C Surface Mount MSOP 8 3 x 3 x 0.95mm 3mm 3mm 0.95mm 5.5 V +85 °C
RS Stock No. 165-2125
หมายเลขชิ้นส่วนของผู้ผลิต / Mfr. Part No.MCP7940N-I/P
Brand :Microchip
THB27.135
Each (In a Tube of 60)
Units
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