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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รายละเอียดสินค้า / Description ราคา / Price 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 Stock No. 103-9921
หมายเลขชิ้นส่วนของผู้ผลิต / Mfr. Part No.DS3234SN#
THB252.44
Each (In a Tube of 36)
Units
Battery Backup, Calendar, SRAM DW:DM:M:Y HH:MM:SS 256B Serial-SPI Surface Mount SOIC 20 13 x 7.6 x 2.35mm 13mm 7.6mm 2.35mm 5.5 V +85 °C
RS Stock No. 190-5176
หมายเลขชิ้นส่วนของผู้ผลิต / Mfr. Part No.DS3234S#T&R
THB257.53
Each
Units
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 Stock No. 877-2772
หมายเลขชิ้นส่วนของผู้ผลิต / Mfr. Part No.M41T0M6F
THB59.838
Each: (In a Pack of 5)
Units
Real Time Clock DW:DM:M:Y HH:MM:SS 8B Serial-2 Wire, Serial-I2C Surface Mount SOIC 8 5 x 4 x 1.5mm 5mm 4mm 1.5mm 5.5 V +85 °C
RS Stock No. 189-8655
หมายเลขชิ้นส่วนของผู้ผลิต / Mfr. Part No.DS1305E+
THB172.79
Each: (In a Pack of 2)
Units
Alarm, Calendar DW:DM:M:Y HH:MM:SS 96B Serial-SPI Surface Mount TSSOP 20 6.5 x 4.4 x 0.9mm 6.5mm 4.4mm 0.9mm 5.5 V +70 °C
RS Stock No. 921-5532
หมายเลขชิ้นส่วนของผู้ผลิต / Mfr. Part No.CDP68HC68T1MZ
THB308.14
Each
Units
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
RS Stock No. 797-9458
หมายเลขชิ้นส่วนของผู้ผลิต / Mfr. Part No.DS1338Z-18+
THB114.15
Each: (In a Pack of 2)
Units
Calendar YY:MM:DD HH:MM:SS 56B Serial-2 Wire, Serial-I2C Surface Mount SOIC 8 5 x 4 x 1.5mm 5mm 4mm 1.5mm 5.5 V +85 °C
RS Stock No. 920-9120
หมายเลขชิ้นส่วนของผู้ผลิต / Mfr. Part No.M41T00M6F
THB37.944
Each (On a Reel of 2500)
Units
Calendar D:M:Y:C HH:MM:SS 8B Serial-I2C Surface Mount SOIC 8 5 x 4 x 1.5mm 5mm 4mm 1.5mm 5.5 V +85 °C
RS Stock No. 192-1551
หมายเลขชิ้นส่วนของผู้ผลิต / Mfr. Part No.DS1744W-120+
THB832.89
Each
Units
Calendar YY:MM:DD HH:MM:SS 32 x 8B Parallel Through Hole EDIP 28 39.37 x 18.8 x 10.67mm 39.37mm 18.8mm 10.67mm 0.6 V, 3.6 V +70 °C
RS Stock No. 190-4737
หมายเลขชิ้นส่วนของผู้ผลิต / Mfr. Part No.DS1340Z-33+T&R
THB52.952
Each (On a Reel of 2500)
Units
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
RS Stock No. 190-4749
หมายเลขชิ้นส่วนของผู้ผลิต / Mfr. Part No.DS3231S#T&R
THB138.268
Each (On a Reel of 1000)
Units
Real Time Clock 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 +70 °C
RS Stock No. 823-7954
หมายเลขชิ้นส่วนของผู้ผลิต / Mfr. Part No.MCP79511-I/MS
Brand :Microchip
THB37.628
Each: (In a Pack of 5)
Units
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
RS Stock No. 189-8629
หมายเลขชิ้นส่วนของผู้ผลิต / Mfr. Part No.DS1338Z-33+
THB117.596
Each: (In a Pack of 5)
Units
Battery Backup, Calendar, NV RAM DW:DM:M:Y 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
RS Stock No. 732-7321
หมายเลขชิ้นส่วนของผู้ผลิต / Mfr. Part No.DS1306E+
THB174.66
Each
Units
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 +70 °C
RS Stock No. 511-103
หมายเลขชิ้นส่วนของผู้ผลิต / Mfr. Part No.PCF8563TS/4,118
Brand :NXP
THB55.852
Each: (In a Pack of 5)
Units
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 Stock No. 189-7229
หมายเลขชิ้นส่วนของผู้ผลิต / Mfr. Part No.DS1340C-33#
THB159.62
Each (In a Tube of 46)
Units
Trickle Charger DD:M:Y SS:MM:HH 7B Serial-I2C Surface Mount SOIC 16 18.1 x 7.6 x 2.35mm 18.1mm 7.6mm 2.35mm 5.5 V +85 °C
RS Stock No. 170-8112
หมายเลขชิ้นส่วนของผู้ผลิต / Mfr. Part No.ISL1208IU8Z-T7A
Brand :Intersil
THB91.565
Each (On a Reel of 250)
Units
Alarm, Calendar, Clock, SRAM DW:DM:M:Y HH:MM:SS - Serial-I2C Surface Mount MSOP 8 3.05 x 3.05 x 0.95mm 3.05mm 3.05mm 0.95mm 5.5 V +85 °C
RS Stock No. 171-1642
หมายเลขชิ้นส่วนของผู้ผลิต / Mfr. Part No.RV-3049-C2-TB-030
Brand :Micro Crystal
THB224.81
Each (On a Tape of 100)
Units
Battery Backup, Calendar, NV RAM DW:DM:M:Y HH:MM:SS 8B Serial-SPI Surface Mount SON 10 5 x 3.2 x 1.2mm 5mm 3.2mm 1.2mm 5.5 V +85 °C
RS Stock No. 732-7333
หมายเลขชิ้นส่วนของผู้ผลิต / Mfr. Part No.DS1307ZN+
THB121.31
Each
Units
Calendar DW:DM:M:Y 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
RS Stock No. 540-4750
หมายเลขชิ้นส่วนของผู้ผลิต / Mfr. Part No.DS1302Z+
THB115.72
Each
Units
Calendar, NV RAM, Trickle Charger DW:DM:M:Y HH:MM:SS 31B Serial Surface Mount SOIC 8 5 x 4 x 1.5mm 5mm 4mm 1.5mm 5.5 V +70 °C
RS Stock No. 171-1651
หมายเลขชิ้นส่วนของผู้ผลิต / Mfr. Part No.RV-3029-C3-TA-QC-OPT.B
Brand :Micro Crystal
THB211.09
Each (On a Tape of 100)
Units
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
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