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 81 - 100 รายการจาก 435 รายการ / Viewing 81 - 100 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. 624-8438
หมายเลขชิ้นส่วนของผู้ผลิต / Mfr. Part No.M41T62Q6F
THB51.05
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. 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. 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. 165-3406
หมายเลขชิ้นส่วนของผู้ผลิต / Mfr. Part No.MCP7940MT-I/MNY
Brand :Microchip
THB23.026
Each (On a Reel of 3300)
Units
Calendar, NV SRAM DW:DM:M:Y HH:MM:SS 64B Serial-I2C Surface Mount TDFN 8 2 x 3 x 0.75mm 2mm 3mm 0.75mm 5.5 V +85 °C
RS Stock No. 540-4750
หมายเลขชิ้นส่วนของผู้ผลิต / Mfr. Part No.DS1302Z+
THB100.77
Each
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. 189-8542
หมายเลขชิ้นส่วนของผู้ผลิต / Mfr. Part No.DS1302ZN+T&R
THB123.606
Each: (In a Pack of 5)
Units
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 +85 °C
RS Stock No. 797-9590
หมายเลขชิ้นส่วนของผู้ผลิต / Mfr. Part No.DS1746WP-120+
THB931.96
Each
Units
Calendar YY:MM:DD HH:MM:SS 128 x 8bit Parallel Surface Mount Power Cap 34 25.27 x 23.62 x 0.81mm 25.27mm 23.62mm 0.81mm 0.6 V, 3.6 V +70 °C
RS Stock No. 188-9366
หมายเลขชิ้นส่วนของผู้ผลิต / Mfr. Part No.M41ST85WMX6TR
THB205.19
Each
Units
Alarm, Battery Backup, Calendar, Watchdog Timer Binary, D:D:M:Y:C - 64bit - Surface Mount SOX 28 18.01 x 7.67 x 2.39mm 18.01mm 7.67mm 2.39mm 3.6 V +85 °C
RS Stock No. 189-7233
หมายเลขชิ้นส่วนของผู้ผลิต / Mfr. Part No.DS1374U-33+
THB115.88
Each (In a Tube of 50)
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. 729-3375
หมายเลขชิ้นส่วนของผู้ผลิต / Mfr. Part No.RV-8564-C2-TA-020
Brand :Micro Crystal
THB192.47
Each
Units
Calendar DW:DM:M:Y HH:MM:SS - Serial-I2C Surface Mount SON 10 5 x 3.2 x 1.2mm 5mm 3.2mm 1.2mm 5.5 V +85 °C
RS Stock No. 803-2222
หมายเลขชิ้นส่วนของผู้ผลิต / Mfr. Part No.MCP79520-I/MS
Brand :Microchip
THB42.126
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. 189-7236
หมายเลขชิ้นส่วนของผู้ผลิต / Mfr. Part No.DS1390U-33+
THB115.88
Each (In a Tube of 50)
Units
Battery Backup, Calendar, NV RAM 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 Stock No. 923-7472
หมายเลขชิ้นส่วนของผู้ผลิต / Mfr. Part No.DS1339U-33+T&R
THB67.575
Each (On a Reel of 3000)
Units
Battery Backup, Calendar YY:MM:DD 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. 188-9342
หมายเลขชิ้นส่วนของผู้ผลิต / Mfr. Part No.M41T80M6F
THB74.36
Each
Units
Alarm, Calendar Binary, D:D:M:Y:C - - 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. 732-7535
หมายเลขชิ้นส่วนของผู้ผลิต / Mfr. Part No.DS2417P+
THB65.72
Each
Units
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 Stock No. 518-429
หมายเลขชิ้นส่วนของผู้ผลิต / Mfr. Part No.ISL1208IB8Z
Brand :Intersil
THB66.768
Each: (In a Pack of 5)
Units
Alarm, Battery Backup, Calendar DW:DM:M:Y HH:MM:SS 2B Serial-I2C Surface Mount SOIC 8 5 x 4 x 1.5mm 5mm 4mm 1.5mm 5.5 V +85 °C
RS Stock No. 191-6894
หมายเลขชิ้นส่วนของผู้ผลิต / Mfr. Part No.DS1685S-5+
THB191.385
Each: (In a Pack of 2)
Units
NV SRAM, Real Time Clock - - 242B Multiplexed Surface Mount SO 24 15.6 x 7.6 x 2.35mm 15.6mm 7.6mm 2.35mm 5.5 V +70 °C
RS Stock No. 729-3230
หมายเลขชิ้นส่วนของผู้ผลิต / Mfr. Part No.RV-8564-C2-TA-010
Brand :Micro Crystal
THB216.70
Each
Units
Calendar DW:DM:M:Y HH:MM:SS - Serial-I2C Surface Mount SON 10 5 x 3.2 x 1.2mm 5mm 3.2mm 1.2mm 5.5 V +85 °C
RS Stock No. 511-103
หมายเลขชิ้นส่วนของผู้ผลิต / Mfr. Part No.PCF8563TS/4,118
Brand :NXP
THB50.266
Each: (In a Pack of 5)
Units
Alarm, Battery Backup, Calendar, Watchdog 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 +85 °C
RS Stock No. 170-8112
หมายเลขชิ้นส่วนของผู้ผลิต / Mfr. Part No.ISL1208IU8Z-T7A
Brand :Intersil
THB102.842
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