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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Nombre de résultats par page
Description Prix 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
N° de stock RS 205-3462
Référence fabricantX1B000301000112
MarqueEpson
2,712 €
Each (On a Reel of 250)
Unité
Real Time Clock - - - - - 3.2x2.5 ceramic package 10 - - - - - -
N° de stock RS 169-8144
Référence fabricantQ41802551000111
MarqueEPSON
1,534 €
Each (On a Reel of 250)
Unité
Alarm, Calendar, Timer - - - Serial-I2C Surface Mount SOP 14 5 x 10.1 x 3.2mm 5mm 10.1mm 3.2mm 5.5 V +85 °C
N° de stock RS 190-4734
Référence fabricantDS1339C-33#T&R
2,742 €
Each (On a Reel of 1000)
Unité
Alarm, Clock, Real Time Clock, Square Wave Output, Trickle Charger 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 +85 °C
N° de stock RS 177-0305
Référence fabricantMCP7940N-E/SN
MarqueMicrochip
0,615 €
Each (In a Tube of 100)
Unité
- 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
N° de stock RS 192-1505
Référence fabricantDS1305N+
6,105 €
Each (In a Pack of 2)
Unité
Alarm, Trickle Charger YY:MM:DD HH:MM:SS 96B Serial-SPI Through Hole PDIP 16 19.43 x 7.87 x 4.45mm 19.43mm 7.87mm 4.45mm 5.5 V +85 °C
N° de stock RS 189-8654
Référence fabricantDS1340C-33#
5,87 €
Each (In a Pack of 2)
Unité
Trickle Charger DD:M:Y SS:MM:HH 7B Serial-I2C Surface Mount SOIC 16 18.1 x 7.6 x 2.35mm 18.1mm 7.6mm 2.35mm 5.5 V +85 °C
N° de stock RS 189-8685
Référence fabricantDS1339C-33#
5,81 €
Each (In a Pack of 2)
Unité
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
N° de stock RS 189-7197
Référence fabricantDS1302+
2,643 €
Each (In a Tube of 50)
Unité
Alarm, Battery Backup, Calendar DW:DM:M:Y HH:MM:SS 31B Serial Through Hole PDIP 8 9.91 x 7.87 x 4.45mm 9.91mm 7.87mm 4.45mm 5.5 V +70 °C
N° de stock RS 190-5152
Référence fabricantDS1347T+T&R
2,894 €
Each (In a Pack of 5)
Unité
Alarm, Real Time Clock, SRAM DM:M:Y:C SS:MM:HH - - Surface Mount TDFN-EP 8 3.1 x 3.1 x 0.8mm 3.1mm 3.1mm 0.8mm 5.5 V +85 °C