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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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 189-7226
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 189-7211
Référence fabricantDS1306EN+
4,231 €
Each (In a Tube of 74)
Unité
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
N° de stock RS 732-7327
Référence fabricantDS1305EN+
5,30 €
Each
Unité
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
N° de stock RS 169-8222
Référence fabricantX1B000311000112
MarqueEPSON
3,228 €
Each (On a Tape of 20)
Unité
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
N° de stock RS 189-7212
Référence fabricantDS1307+
2,709 €
Each (In a Tube of 50)
Unité
Alarm, Battery Backup, Calendar, Power Fail DW:DM:M:Y HH:MM:SS 56B Serial-I2C 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 823-7954
Référence fabricantMCP79511-I/MS
MarqueMicrochip
1,018 €
Each (In a Pack of 5)
Unité
Calendar D:W:M:Y, LY HH, HS, MM, SS 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 196-9069
Référence fabricantISL1208IB8Z-TK
1,027 €
Each (On a Reel of 1000)
Unité
- DW:DM:M:Y HH:MM:SS - - - SOIC 8 - - - - - -
N° de stock RS 732-7582
Référence fabricantDS3231SN#
8,87 €
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 189-7227
Référence fabricantDS1339U-33+
2,85 €
Each (In a Tube of 50)
Unité
Battery Backup, Calendar DW:DM:M:Y 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
N° de stock RS 798-5258
Référence fabricantMCP7940N-I/SN
MarqueMicrochip
0,626 €
Each (In a Pack of 10)
Unité
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
N° de stock RS 714-0855
Référence fabricantM41T00SM6F
2,29 €
Each
Unité
- DW:DM:M:Y HH:MM:SS 8B Serial-2 Wire, Serial-I2C Surface Mount SOIC 8 5 x 4 x 1.25mm 5mm 4mm 1.25mm 5.5 V +85 °C
N° de stock RS 169-8223
Référence fabricantX1B000301000212
MarqueEPSON
2,156 €
Each (On a Reel of 250)
Unité
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
N° de stock RS 189-7231
Référence fabricantDS1371U+
2,056 €
Each (In a Tube of 50)
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 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
N° de stock RS 189-7213
Référence fabricantDS1307N+
2,796 €
Each (In a Tube of 50)
Unité
Clock DM:M:DW:Y SS:MM:HH 56B Serial-I2C Through Hole PDIP 8 9.91 x 7.87 x 4.45mm 9.91mm 7.87mm 4.45mm 5.5 V +85 °C
N° de stock RS 196-9070
Référence fabricantISL1208IB8Z-TK
2,11 €
Each (In a Pack of 5)
Unité
- DW:DM:M:Y HH:MM:SS - - - SOIC 8 - - - - - -
N° de stock RS 165-5507
Référence fabricantM41T62LC6F
2,051 €
Each (On a Reel of 1000)
Unité
Alarm, Calendar, Real Time Clock, Square Wave Output, Watchdog Timer Binary, D:D:M:Y:C Binary, HH:MM:SS 16B Serial Surface Mount CLCC 8 3.3 x 1.6 x 0.8mm 3.3mm 1.6mm 0.8mm 4.4 V +85 °C
N° de stock RS 189-8496
Référence fabricantDS1307N+
3,385 €
Each (In a Pack of 2)
Unité
Clock DM:M:DW:Y SS:MM:HH 56B Serial-I2C Through Hole PDIP 8 9.91 x 7.87 x 4.45mm 9.91mm 7.87mm 4.45mm 5.5 V +85 °C
N° de stock RS 171-1655
Référence fabricantRV-3049-C3-TA-QC-OPT.A
3,157 €
Each (On a Tape of 100)
Unité
Alarm, Battery Backup, Calendar, Clock D:W:M:Y HH:MM:SS 8B Serial-4 Wire, Serial-SPI Surface Mount SON 10 3.7 x 2.5 x 0.9mm 3.7mm 2.5mm 0.9mm 5.5 V +85 °C
N° de stock RS 190-4737
Référence fabricantDS1340Z-33+T&R
1,414 €
Each (On a Reel of 2500)
Unité
Real Time Clock, Trickle Charger D:D:M:Y SS:MM:HH - Serial-I2C Surface Mount SO 8 5 x 4 x 1.5mm 5mm 4mm 1.5mm 5.5 V +85 °C