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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Beskrivning Pris 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-artikelnummer 124-2362
Tillv. art.nrPCF8563T/5,518
VarumärkeNXP
6,804 kr
Each (On a Reel of 2500)
Enheter
Calendar, Clock YY:MM:DD:dd HH:MM:SS - Serial-2 Wire, Serial-I2C Surface Mount SOIC 8 5 x 4 x 1.45mm 5mm 4mm 1.45mm 5.5 V +85 °C
RS-artikelnummer 865-2208
Tillv. art.nrPCF8563T/5,518
VarumärkeNXP
7,062 kr
Each (In a Pack of 10)
Enheter
Calendar, Clock YY:MM:DD:dd HH:MM:SS - Serial-2 Wire, Serial-I2C Surface Mount SOIC 8 5 x 4 x 1.45mm 5mm 4mm 1.45mm 5.5 V +85 °C
RS-artikelnummer 166-1602
Tillv. art.nrPCF8563TS/4,118
VarumärkeNXP
14,113 kr
Each (On a Reel of 2500)
Enheter
Alarm, Battery Backup, Calendar, Watchdog 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 +85 °C
RS-artikelnummer 166-0314
Tillv. art.nrPCA8565TS/1,118
VarumärkeNXP
7,249 kr
Each (On a Reel of 2500)
Enheter
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
RS-artikelnummer 727-5743
Tillv. art.nrPCA8565TS/1,118
VarumärkeNXP
14,58 kr
Each (In a Pack of 2)
Enheter
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
RS-artikelnummer 511-103
Tillv. art.nrPCF8563TS/4,118
VarumärkeNXP
14,372 kr
Each (In a Pack of 5)
Enheter
Alarm, Battery Backup, Calendar, Watchdog 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 +85 °C
RS-artikelnummer 727-5731
Tillv. art.nrPCF2123TS/1,112
VarumärkeNXP
10,855 kr
Each (In a Pack of 2)
Enheter
Alarm, Calendar, Interrupt, Timer DW:DM:M:Y HH:MM:SS - Serial-SPI Surface Mount TSSOP 14 5.1 x 4.5 x 0.95mm 5.1mm 4.5mm 0.95mm 5.5 V +85 °C