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, a 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 facilitate the performance of the software functions that are time dependant. They are designed to run on an ultra-low power consumption, often run on a lithium battery source or 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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Omschrijving Prijs 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-stocknr. 518-429
FabrikantnummerISL1208IB8Z
FabrikantIntersil
2,274 €
Each (In a Pack of 5)
Aantal stuks
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-stocknr. 797-9593
FabrikantnummerDS1746-70+
FabrikantMaxim Integrated
30,18 €
Each
Aantal stuks
Calendar YY:MM:DD HH:MM:SS 128 x 8bit Parallel Through Hole EDIP 32 44.2 x 18.8 x 10.92mm 44.2mm 18.8mm 10.92mm 0.8 V, 5.3 V +70 °C
RS-stocknr. 189-8548
FabrikantnummerDS1307Z+T&R
FabrikantMaxim Integrated
2,534 €
Each (In a Pack of 5)
Aantal stuks
Battery Backup, Calendar, NV RAM YY:MM:DD HH:MM:SS 56B Serial-I2C Surface Mount SOIC 8 5 x 4 x 1.5mm 5mm 4mm 1.5mm 5.5 V +70 °C
RS-stocknr. 921-5964
FabrikantnummerISL12022MIBZ
6,185 €
Each (In a Pack of 2)
Aantal stuks
Alarm, Battery Backup, Calendar, Low Battery Detection DW:DM:M:Y SS:MM:HH 128B Serial-I2C Surface Mount SOIC 20 13 x 7.6 x 2.35mm 13mm 7.6mm 2.35mm 5.5 V +85 °C
RS-stocknr. 726-3949
FabrikantnummerMCP79410-I/SN
FabrikantMicrochip
0,762 €
Each (In a Pack of 5)
Aantal stuks
Battery Backup, 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-stocknr. 196-9066
FabrikantnummerISL12057IUZ
1,717 €
Each (In a Tube of 50)
Aantal stuks
- DW:DM:M:Y HH:MM:SS - - - MSOP 8 - - - - - -
RS-stocknr. 189-8339
FabrikantnummerDS1302N+
FabrikantMaxim Integrated
3,33 €
Each (In a Pack of 2)
Aantal stuks
Trickle Charger DM:M:DW:Y SS:MM:HH 31B Serial-3 Wire Through Hole PDIP 8 9.91 x 7.87 x 4.45mm 9.91mm 7.87mm 4.45mm 5.5 V +85 °C
RS-stocknr. 798-5260
FabrikantnummerMCP79412-I/SN
FabrikantMicrochip
0,828 €
Each (In a Pack of 5)
Aantal stuks
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-stocknr. 188-9366
FabrikantnummerM41ST85WMX6TR
5,65 €
Each
Aantal stuks
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-stocknr. 912-6943
FabrikantnummerMCP7940M-I/SN
FabrikantMicrochip
0,451 €
Each (In a Tube of 100)
Aantal stuks
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-stocknr. 169-8918
FabrikantnummerBU9873F-GTE2
FabrikantROHM
0,335 €
Each (On a Reel of 2500)
Aantal stuks
Real Time Clock YY:MM:DD:dd HH:MM:SS - Serial-I2C Surface Mount SOP 8 5.35 x 4.4 x 1.5mm 5.35mm 4.4mm 1.5mm 5.5 V +85 °C
RS-stocknr. 169-8222
FabrikantnummerX1B000311000112
FabrikantEPSON
3,228 €
Each (On a Tape of 20)
Aantal stuks
Clock - SS:HH 32bit Serial-I2C Surface Mount - 10 3.2 x 2.5 x 1mm 3.2mm 2.5mm 1mm 5.5 V +85 °C
RS-stocknr. 159-7452
FabrikantnummerMCP79520-I/MS
FabrikantMicrochip
0,924 €
Each (In a Tube of 100)
Aantal stuks
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-stocknr. 169-8137
FabrikantnummerQ41454351000111
FabrikantEPSON
1,273 €
Each (On a Reel of 250)
Aantal stuks
Calendar, Timer - - - Serial Surface Mount SOP 14 5 x 10.1 x 3.2mm 5mm 10.1mm 3.2mm 5.5 V +85 °C
RS-stocknr. 190-5176
FabrikantnummerDS3234S#T&R
FabrikantMaxim Integrated
6,42 €
Each
Aantal stuks
SRAM D:D:M:Y SS:MM:HH 256B - Surface Mount SO 20 13 x 7.6 x 2.35mm 13mm 7.6mm 2.35mm 5.5 V +70 °C
RS-stocknr. 169-8140
FabrikantnummerQ41457451000200
FabrikantEPSON
1,998 €
Each (On a Reel of 250)
Aantal stuks
Alarm, Calendar, Timer - - - Serial Surface Mount SOP 14 5 x 10.1 x 3.2mm 5mm 10.1mm 3.2mm 5.5 V +85 °C
RS-stocknr. 761-9711
FabrikantnummerDS1339U-33+T&R
FabrikantMaxim Integrated
3,40 €
Each
Aantal stuks
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-stocknr. 518-299
FabrikantnummerISL12026IBZ
FabrikantIntersil
3,00 €
Each
Aantal stuks
Alarm, Battery Backup, Calendar, Switch Over DW:DM:M:Y HH:MM:SS 512B Serial-I2C Surface Mount SOIC 8 5 x 4 x 1.5mm 5mm 4mm 1.5mm 5.5 V +85 °C
RS-stocknr. 189-7198
FabrikantnummerDS1302N+
FabrikantMaxim Integrated
2,828 €
Each (In a Tube of 50)
Aantal stuks
Trickle Charger DM:M:DW:Y SS:MM:HH 31B Serial-3 Wire Through Hole PDIP 8 9.91 x 7.87 x 4.45mm 9.91mm 7.87mm 4.45mm 5.5 V +85 °C
RS-stocknr. 732-7535
FabrikantnummerDS2417P+
FabrikantMaxim Integrated
2,08 €
Each
Aantal stuks
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
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