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

...
Voir plus Voir moins

Filtres

Afficher 81 - 100 des 432 produits
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 189-7233
Référence fabricantDS1374U-33+
2,611 €
Each (In a Tube of 50)
Unité
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
N° de stock RS 188-9206
Référence fabricantM41T82RM6F
1,07 €
Each (On a Reel of 2500)
Unité
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
N° de stock RS 190-5219
Référence fabricantDS3231S#T&R
6,09 €
Each
Unité
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
N° de stock RS 189-7226
Référence fabricantDS1339C-33#
4,362 €
Each (In a Tube of 46)
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 189-8569
Référence fabricantDS1338Z-3+
3,002 €
Each (In a Pack of 5)
Unité
Clock M:M:DW SS:MM:HH 56B Serial-I2C Surface Mount SOIC 8 5 x 4 x 1.5mm 5mm 4mm 1.5mm 5.5 V +85 °C
N° de stock RS 190-5173
Référence fabricantDS1374U-18+
2,97 €
Each (In a Pack of 5)
Unité
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 1.89 V +85 °C
N° de stock RS 923-7494
Référence fabricantDS1302Z+T&R
1,653 €
Each (On a Reel of 2500)
Unité
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 +70 °C
N° de stock RS 714-7298
Référence fabricantM48T18-100PC1
17,16 €
Each
Unité
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
N° de stock RS 797-9590
Référence fabricantDS1746WP-120+
25,86 €
Each
Unité
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
N° de stock RS 189-8434
Référence fabricantDS1371U+
2,468 €
Each (In a Pack of 5)
Unité
Calendar, NV RAM Binary Binary 3B 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
N° de stock RS 729-3221
Référence fabricantRV-3049-C2-TB-008
13,12 €
Each
Unité
Battery Backup, Calendar, NV RAM 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 +125 °C
N° de stock RS 732-7582
Référence fabricantDS3231SN#
8,40 €
Each
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 171-1637
Référence fabricantRV-2123-C2-STD-020
5,06 €
Each (On a Tape of 100)
Unité
Alarm, Calendar, Timer DW:DM:M:Y HH:MM:SS - Serial-SPI Surface Mount SON 10 5 x 3.2 x 1.2mm 5mm 3.2mm 1.2mm 5.5 V +85 °C
N° de stock RS 189-7194
Référence fabricantDS12887+
7,636 €
Each (In a Tube of 14)
Unité
Alarm, Battery Backup, Calendar, Power Fail Binary, DW:DM:M:Y Binary, HH:MM:SS 114B Multiplexed Through Hole EDIP 24 34.04 x 18.8 x 9.4mm 34.04mm 18.8mm 9.4mm 5.5 V +70 °C
N° de stock RS 189-8385
Référence fabricantDS17887-5+
15,63 €
Each
Unité
Alarm, Calendar YY:MM:DD HH:MM:SS 114B Multiplexed Through Hole EDIP 24 38.1 x 18.29 x 10.67mm 38.1mm 18.29mm 10.67mm 5.5 V +70 °C
N° de stock RS 825-1076
Référence fabricantMCP79510-I/MS
MarqueMicrochip
0,948 €
Each (In a Pack of 5)
Unité
Calendar DW:M:Y:LY HH:MM:SS:HSS 64B Serial-SPI Surface Mount MSOP 10 3 x 3 x 0.95mm 3mm 3mm 0.95mm 3.6 V +85 °C
N° de stock RS 191-3232
Référence fabricantDS1307ZN+T&R
1,523 €
Each (On a Reel of 2500)
Unité
NV SRAM, Real Time Clock DM:M:DW:Y SS:MM:HH - Serial-I2C Surface Mount SO 8 5 x 4 x 1.5mm 5mm 4mm 1.5mm 4.5 V +85 °C
N° de stock RS 165-9387
Référence fabricantDS1338C-33#
4,264 €
Each (In a Tube of 46)
Unité
Clock M:M:DW SS:MM:HH 56B 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 667-6230
Référence fabricantQ41454351000111
MarqueEPSON
1,34 €
Each
Unité
Calendar, Timer - - - Serial 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 189-7241
Référence fabricantDS1672S-33+
1,915 €
Each (In a Tube of 100)
Unité
Battery Backup, Calendar DW:DM:M:Y HH:MM:SS - Serial-I2C Surface Mount SOIC 8 5 x 4 x 1.5mm 5mm 4mm 1.5mm 5.5 V +85 °C