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 61 - 80 รายการจาก 435 รายการ / Viewing 61 - 80 of 435 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. 190-4754
หมายเลขชิ้นส่วนของผู้ผลิต / Mfr. Part No.DS3234SN#T&R
THB187.673
Each (On a Reel of 1000)
Units
Crystal, Real Time Clock, SRAM D:D:M:Y SS:MM:HH 256B Serial-SPI Surface Mount SO 20 13 x 7.6 x 2.35mm 13mm 7.6mm 2.35mm 5.5 V +85 °C
RS Stock No. 191-4205
หมายเลขชิ้นส่วนของผู้ผลิต / Mfr. Part No.DS1687-3+
THB393.739
Each (In a Tube of 14)
Units
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 Stock No. 188-9363
หมายเลขชิ้นส่วนของผู้ผลิต / Mfr. Part No.M41T82SM6F
THB82.20
Each
Units
Alarm, Battery Backup, Calendar, Watchdog Timer Binary, D:D:M:Y:C - 32bit Serial-2 Wire, Serial-I2C Surface Mount SO 8 5 x 4 x 1.5mm 5mm 4mm 1.5mm 5.5 V +85 °C
RS Stock No. 190-5777
หมายเลขชิ้นส่วนของผู้ผลิต / Mfr. Part No.DS1338Z-33+T&R
THB104.548
Each: (In a Pack of 5)
Units
NV RAM, Real Time Clock DM:M:DW:Y SS:MM:HH - Serial-I2C Surface Mount μSOP 8 5 x 4 x 1.5mm 5mm 4mm 1.5mm 5.5 V +85 °C
RS Stock No. 732-7355
หมายเลขชิ้นส่วนของผู้ผลิต / Mfr. Part No.DS1337U+
THB77.66
Each
Units
Calendar DW:DM: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. 189-7227
หมายเลขชิ้นส่วนของผู้ผลิต / Mfr. Part No.DS1339U-33+
THB111.374
Each (In a Tube of 50)
Units
Battery Backup, Calendar DW:DM: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. 190-5166
หมายเลขชิ้นส่วนของผู้ผลิต / Mfr. Part No.DS3232SN#T&R
THB268.29
Each
Units
Alarm, SRAM DM:M:DW:Y SS:MM:HH 236B Serial-I2C Surface Mount SO 20 13 x 7.6 x 2.35mm 13mm 7.6mm 2.35mm 5.5 V +85 °C
RS Stock No. 823-0776
หมายเลขชิ้นส่วนของผู้ผลิต / Mfr. Part No.MCP79400-I/SN
Brand :Microchip
THB28.957
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. 169-8315
หมายเลขชิ้นส่วนของผู้ผลิต / Mfr. Part No.DS1302Z+
THB86.594
Each (In a Tube of 100)
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. 189-8685
หมายเลขชิ้นส่วนของผู้ผลิต / Mfr. Part No.DS1339C-33#
THB196.81
Each: (In a Pack of 2)
Units
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 +85 °C
RS Stock No. 189-7234
หมายเลขชิ้นส่วนของผู้ผลิต / Mfr. Part No.DS1388Z-33+
THB139.423
Each (In a Tube of 100)
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. 190-4745
หมายเลขชิ้นส่วนของผู้ผลิต / Mfr. Part No.DS1682S+T&R
THB99.611
Each (On a Reel of 2500)
Units
Alarm - - - - Surface Mount SO 8 5 x 4 x 1.5mm 5mm 4mm 1.5mm 5.5 V +85 °C
RS Stock No. 171-1651
หมายเลขชิ้นส่วนของผู้ผลิต / Mfr. Part No.RV-3029-C3-TA-QC-OPT.B
Brand :Micro Crystal
THB194.203
Each (On a Tape of 100)
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. 732-7327
หมายเลขชิ้นส่วนของผู้ผลิต / Mfr. Part No.DS1305EN+
THB164.44
Each
Units
Battery Backup, Calendar, NV RAM DW:DM:M:Y HH:MM:SS 96B Serial-SPI Surface Mount TSSOP 20 6.6 x 4.5 x 0.95mm 6.6mm 4.5mm 0.95mm 5.5 V +85 °C
RS Stock No. 774-7403
หมายเลขชิ้นส่วนของผู้ผลิต / Mfr. Part No.MCP7940M-I/P
Brand :Microchip
THB24.071
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. 205-3461
หมายเลขชิ้นส่วนของผู้ผลิต / Mfr. Part No.X1B000371000212
Brand :Epson
THB95.655
Each: (In a Pack of 2)
Units
Real Time Clock - - - - - 3.2x2.5 ceramic package 10 - - - - - -
RS Stock No. 190-4739
หมายเลขชิ้นส่วนของผู้ผลิต / Mfr. Part No.DS1372U+
THB78.435
Each (In a Tube of 50)
Units
Alarm, Binary Counter, Real Time Clock - - - Serial-I2C, Serial-SPI 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. 205-3456
หมายเลขชิ้นส่วนของผู้ผลิต / Mfr. Part No.X1B000311000112
Brand :Epson
THB38.629
Each (On a Reel of 250)
Units
Real Time Clock - - - - - 3.2x2.5 ceramic package 10 - - - - - -
RS Stock No. 798-5254
หมายเลขชิ้นส่วนของผู้ผลิต / Mfr. Part No.MCP7940N-I/MS
Brand :Microchip
THB27.132
Each: (In a Pack of 10)
Units
Battery Backup, Calendar 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. 171-1636
หมายเลขชิ้นส่วนของผู้ผลิต / Mfr. Part No.RV-3049-C2-STD-025
Brand :Micro Crystal
THB180.234
Each (On a Tape of 100)
Units
Alarm, Calendar, Timer DW:DM:M:Y HH:MM:SS 8B Serial-SPI Surface Mount SON 10 5 x 3.2 x 1.2mm 5mm 3.2mm 1.2mm 5.5 V +85 °C