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 168-6813
Référence fabricantM41T00SM6F
1,188 €
Each (On a Reel of 2500)
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 797-9600
Référence fabricantDS1747-70+
35,58 €
Each
Unité
Calendar YY:MM:DD HH:MM:SS 512 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
N° de stock RS 168-8043
Référence fabricantM41ST87WSS6F
3,326 €
Each (On a Reel of 1350)
Unité
Calendar D:D:M:Y:C HH:MM:SS:HSS 128B Serial Surface Mount SSOP 20 7.5 x 5.6 x 1.85mm 7.5mm 5.6mm 1.85mm 3.6 V +85 °C
N° de stock RS 813-5763
Référence fabricantRV-3029-C3-TA-QC-Opt.B
4,85 €
Each
Unité
Alarm, Battery Backup, Calendar, Clock D:W:M:Y HH:MM:SS 8B Serial-2 Wire, Serial-I2C 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 189-8329
Référence fabricantDS1391U-33+
3,012 €
Each (In a Pack of 5)
Unité
Battery Backup, Calendar, NV SRAM DW:DM:M:Y HH:MM:SS - Serial-SPI 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 165-8028
Référence fabricantM41ST87WMX6TR
3,812 €
Each (On a Reel of 1000)
Unité
Calendar, Clock DD:MM:YY HH:MM:SS 128B Serial-I2C Surface Mount SOX 28 18.01 x 7.67 x 2.38mm 18.01mm 7.67mm 2.38mm 3.6 V +85 °C
N° de stock RS 189-7242
Référence fabricantDS1685EN-3+
4,873 €
Each (In a Tube of 62)
Unité
Alarm, Calendar YY:MM:DD HH:MM:SS 128B Multiplexed Surface Mount TSSOP 24 7.9 x 4.5 x 0.95mm 7.9mm 4.5mm 0.95mm 5 V +85 °C
N° de stock RS 189-7214
Référence fabricantDS1307Z+T&R
1,371 €
Each (On a Reel of 2500)
Unité
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
N° de stock RS 732-7343
Référence fabricantDS1337C#
4,57 €
Each
Unité
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 190-5149
Référence fabricantDS1670E+
7,67 €
Each
Unité
Real Time Clock, SRAM DM:M:DW:Y SS:MM:HH - Multiplexed Surface Mount TSSOP 20 6.6 x 4.5 x 0.95mm 6.6mm 4.5mm 0.95mm 3.63 V +70 °C
N° de stock RS 169-8135
Référence fabricantQ42724231000611
MarqueEPSON
5,166 €
Each (In a Tube of 25)
Unité
Calendar, Timer - - - Serial-I2C Surface Mount SOP 24 16.3 x 7.9 x 2.8mm 16.3mm 7.9mm 2.8mm 5.5 V +85 °C
N° de stock RS 190-4736
Référence fabricantDS1340Z-33+
2,219 €
Each (In a Tube of 100)
Unité
Clock, 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
N° de stock RS 171-1643
Référence fabricantRV-8564-C2-TA-010
4,109 €
Each (On a Tape of 100)
Unité
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
N° de stock RS 817-3667
Référence fabricantMCP79410T-I/ST
MarqueMicrochip
0,726 €
Each (On a Reel of 2500)
Unité
Alarm, Battery Backup, Calendar, Clock DW:D:M:Y HH:MM:SS 64B Serial-2 Wire, Serial-I2C Surface Mount TSSOP 8 3.1 x 4.5 x 1.05mm 3.1mm 4.5mm 1.05mm 5.5 V +85 °C
N° de stock RS 190-4734
Référence fabricantDS1339C-33#T&R
2,611 €
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 192-1238
Référence fabricantDS1556-70+
29,566 €
Each (In a Tube of 11)
Unité
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
N° de stock RS 727-5743
Référence fabricantPCA8565TS/1,118
MarqueNXP
0,695 €
Each (In a Pack of 2)
Unité
Alarm, Calendar, Interrupt, Timer DW:DM:M:Y HH:MM:SS - Serial-I2C Surface Mount TSSOP 8 3.1 x 3.1 x 0.95mm 3.1mm 3.1mm 0.95mm 5.5 V +125 °C
N° de stock RS 786-0749
Référence fabricantDS1337+
2,465 €
Each (In a Pack of 2)
Unité
Clock DD:M:Y SS:MM:HH 7B 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 920-9124
Référence fabricantM41T11M6F
1,513 €
Each (On a Reel of 2500)
Unité
Calendar D:D:M:Y:C HH:MM:SS 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 190-5152
Référence fabricantDS1347T+T&R
2,522 €
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