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. 667-6287
FabrikantnummerQ418564C2000511
FabrikantEPSON
3,02 €
Each
Aantal stuks
Alarm, Calendar, Timer DW:DM:M:Y HH:MM:SS - Serial-I2C Surface Mount VSOJ 12 - 3.6mm 2.4mm - 5.5 V +85 °C
RS-stocknr. 920-9007
FabrikantnummerM41T62Q6F
0,774 €
Each (On a Reel of 3000)
Aantal stuks
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-stocknr. 190-4740
FabrikantnummerDS1374U-18+
FabrikantMaxim Integrated
2,545 €
Each (In a Tube of 50)
Aantal stuks
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
RS-stocknr. 169-8219
FabrikantnummerX1B000172000112
FabrikantEPSON
2,289 €
Each (On a Reel of 250)
Aantal stuks
Alarm, Calendar, Event Detection and Timestamp, Power Switching, Timer DW:DM:M:Y HH:MM:SS - Serial-I2C Surface Mount SOP 14 10.1 x 5 x 3.15mm 10.1mm 5mm 3.15mm 5.5 V +85 °C
RS-stocknr. 189-7234
FabrikantnummerDS1388Z-33+
FabrikantMaxim Integrated
3,231 €
Each (In a Tube of 100)
Aantal stuks
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-stocknr. 190-4742
FabrikantnummerDS1390U-33+T&R
FabrikantMaxim Integrated
1,414 €
Each (On a Reel of 3000)
Aantal stuks
Trickle Charger D:D:M:Y - - Serial-SPI Surface Mount μSOP 10 3.16 x 3.12 x 0.95mm 3.16mm 3.12mm 0.95mm 5.5 V +85 °C
RS-stocknr. 192-1238
FabrikantnummerDS1556-70+
FabrikantMaxim Integrated
29,566 €
Each (In a Tube of 11)
Aantal stuks
Alarm, NV SRAM, Watchdog Timer, Y2K YY:MM:DD HH:MM:SS - 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. 171-1649
FabrikantnummerRV-8564-C2-TA-020
FabrikantMicro Crystal
2,482 €
Each (On a Tape of 100)
Aantal stuks
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-stocknr. 188-9206
FabrikantnummerM41T82RM6F
1,051 €
Each (On a Reel of 2500)
Aantal stuks
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-stocknr. 189-7232
FabrikantnummerDS1374C-33#
FabrikantMaxim Integrated
4,199 €
Each (In a Tube of 46)
Aantal stuks
Battery Backup, Calendar, NV RAM Binary SS 3B 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-stocknr. 921-5721
FabrikantnummerISL12020MIRZ
5,29 €
Each (In a Pack of 2)
Aantal stuks
Alarm, Battery Backup, Calendar, Switch Over DW:DM:M:Y HH:MM:SS 128B Serial-I2C Surface Mount DFN 20 5.5 x 4 x 1.3mm 5.5mm 4mm 1.3mm 5.5 V +85 °C
RS-stocknr. 177-0905
FabrikantnummerMCP795W10-I/SL
FabrikantMicrochip
1,092 €
Each (In a Pack of 5)
Aantal stuks
- D:M:Y, DW HH:MM:SS - Serial-SPI Surface Mount SOIC 14 8.65 x 3.9 x 1.5mm 8.65mm 3.9mm 1.5mm 3.6 V +85 °C
RS-stocknr. 189-8414
FabrikantnummerDS1306EN+
FabrikantMaxim Integrated
4,995 €
Each (In a Pack of 2)
Aantal stuks
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-stocknr. 146-0221
FabrikantnummerMCP79521-I/MS
FabrikantMicrochip
0,909 €
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. 624-8416
FabrikantnummerM41T60Q6F
1,516 €
Each (In a Pack of 5)
Aantal stuks
Battery Backup, Calendar DW:DM:M:Y HH:MM:SS 8B Serial-I2C Surface Mount QFN 16 3 x 3 x 0.88mm 3mm 3mm 0.88mm 4.4 V +85 °C
RS-stocknr. 169-8223
FabrikantnummerX1B000301000212
FabrikantEPSON
2,156 €
Each (On a Reel of 250)
Aantal stuks
Clock - SS:MM - Serial-I2C Surface Mount - 10 3.2 x 2.5 x 1mm 3.2mm 2.5mm 1mm 5.5 V +85 °C
RS-stocknr. 798-5267
FabrikantnummerMCP79411-I/SN
FabrikantMicrochip
0,829 €
Each (In a Pack of 10)
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. 146-0213
FabrikantnummerMCP79412-I/SN
FabrikantMicrochip
0,758 €
Each (In a Tube of 100)
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. 191-3504
FabrikantnummerDS1339AU+
FabrikantMaxim Integrated
3,21 €
Each (In a Pack of 2)
Aantal stuks
Real Time Clock D:D:M:Y SS:MM:HH - Serial-I2C Surface Mount μSOP 8 3.1 x 0.65 x 0.95mm 3.1mm 0.65mm 0.95mm 5.5 V +85 °C
RS-stocknr. 642-3106
FabrikantnummerCDP68HC68T1MZ
9,02 €
Each
Aantal stuks
Alarm, Battery Backup, Calendar, Watchdog Timer DW:DM:M:Y HH:MM:SS 32B Serial-SPI Surface Mount SOIC W 20 13 x 7.6 x 2.35mm 13mm 7.6mm 2.35mm 6 V +85 °C
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