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    Real Time Clocks

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    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, an 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 facilitates the performance of the software functions that are time dependant.

    Designed to run on ultra-low power consumption, RTCs often run on a lithium battery source but can also run on 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

    238 สินค้าที่แสดงสำหรับ Real Time Clocks

    • RS Stock No. 880-5349
    • หมายเลขชิ้นส่วนของผู้ผลิต / Mfr. Part No. M41T94MQ6F
    Each: (In a Pack of 5)
    THB168.112
    STMicroelectronics
    Alarm, Battery Backup, Interrupt, NVRAM, Real Time Clock, Watchdog Timer
    Binary, D:D:M:Y:C
    Binary, HH:MM:SS
    44B
    Serial-SPI
    Surface Mount
    SOIC
    16
    10 x 4 x 1.6mm
    -
    10mm
    4mm
    1.6mm
    5.5 V
    • RS Stock No. 880-5349P
    • หมายเลขชิ้นส่วนของผู้ผลิต / Mfr. Part No. M41T94MQ6F
    Each (Supplied on a Reel)
    THB168.112
    STMicroelectronics
    Alarm, Battery Backup, Interrupt, NVRAM, Real Time Clock, Watchdog Timer
    Binary, D:D:M:Y:C
    Binary, HH:MM:SS
    44B
    Serial-SPI
    Surface Mount
    SOIC
    16
    10 x 4 x 1.6mm
    -
    10mm
    4mm
    1.6mm
    5.5 V
    • RS Stock No. 145-9048
    • หมายเลขชิ้นส่วนของผู้ผลิต / Mfr. Part No. MCP7940N-I/ST
    Each (In a Tube of 100)
    THB34.156
    Microchip
    Calendar
    DW:D:M:Y
    HH:MM:SS
    64B
    Serial-I2C
    Surface Mount
    TSSOP
    8
    4.5 x 3.1 x 1.05mm
    -
    4.5mm
    3.1mm
    1.05mm
    5.5 V
    • RS Stock No. 823-3712
    • หมายเลขชิ้นส่วนของผู้ผลิต / Mfr. Part No. MCP7940N-I/ST
    Each: (In a Pack of 10)
    THB34.679
    Microchip
    Calendar
    DW:D:M:Y
    HH:MM:SS
    64B
    Serial-I2C
    Surface Mount
    TSSOP
    8
    4.5 x 3.1 x 1.05mm
    -
    4.5mm
    3.1mm
    1.05mm
    5.5 V
    • RS Stock No. 823-3712P
    • หมายเลขชิ้นส่วนของผู้ผลิต / Mfr. Part No. MCP7940N-I/ST
    Each (Supplied in a Tube)
    THB34.679
    Microchip
    Calendar
    DW:D:M:Y
    HH:MM:SS
    64B
    Serial-I2C
    Surface Mount
    TSSOP
    8
    4.5 x 3.1 x 1.05mm
    -
    4.5mm
    3.1mm
    1.05mm
    5.5 V
    • RS Stock No. 729-3230
    • หมายเลขชิ้นส่วนของผู้ผลิต / Mfr. Part No. RV-8564-C2-TA-010
    Each
    THB339.12
    Micro Crystal
    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
    • RS Stock No. 729-3230P
    • หมายเลขชิ้นส่วนของผู้ผลิต / Mfr. Part No. RV-8564-C2-TA-010
    Each (Supplied on a Reel)
    THB339.12
    Micro Crystal
    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
    • RS Stock No. 151-845
    • หมายเลขชิ้นส่วนของผู้ผลิต / Mfr. Part No. M48T35Y-70MH1F
    Each
    THB1,159.35
    STMicroelectronics
    SRAM
    -
    -
    -
    -
    -
    DIP
    28
    -
    -
    -
    -
    -
    -
    • RS Stock No. 151-845P
    • หมายเลขชิ้นส่วนของผู้ผลิต / Mfr. Part No. M48T35Y-70MH1F
    Each (Supplied on a Reel)
    THB1,159.35
    STMicroelectronics
    SRAM
    -
    -
    -
    -
    -
    DIP
    28
    -
    -
    -
    -
    -
    -
    • RS Stock No. 907-4732
    • หมายเลขชิ้นส่วนของผู้ผลิต / Mfr. Part No. M41ST87WMX6TR
    Each: (In a Pack of 2)
    THB347.18
    STMicroelectronics
    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
    • RS Stock No. 907-4732P
    • หมายเลขชิ้นส่วนของผู้ผลิต / Mfr. Part No. M41ST87WMX6TR
    Each (Supplied on a Reel)
    THB347.18
    STMicroelectronics
    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
    • RS Stock No. 169-8141
    • หมายเลขชิ้นส่วนของผู้ผลิต / Mfr. Part No. Q41856471000111
    Each (On a Reel of 250)
    THB172.121
    Epson
    Alarm, Calendar, Timer
    DW:DM:M:Y
    HH:MM:SS
    -
    Serial-I2C
    Surface Mount
    VSOJ
    20
    -
    -
    7mm
    5.4mm
    -
    5.5 V
    • RS Stock No. 168-6880
    • หมายเลขชิ้นส่วนของผู้ผลิต / Mfr. Part No. M41T11MH6F
    Each (On a Reel of 936)
    THB170.94
    STMicroelectronics
    Calendar, Chip Deselect, Switch Over
    DW:DM:M:Y
    HH:MM:SS
    64B
    Serial-I2C
    Surface Mount
    SOH
    28
    18.49 x 8.89 x 2.69mm
    -
    18.49mm
    8.89mm
    2.69mm
    5.5 V
    • RS Stock No. 205-3456
    • หมายเลขชิ้นส่วนของผู้ผลิต / Mfr. Part No. X1B000311000112
    Each (On a Reel of 250)
    THB46.772
    Epson
    Real Time Clock
    -
    -
    -
    -
    -
    3.2x2.5 ceramic package
    10
    -
    -
    -
    -
    -
    -
    • RS Stock No. 177-0656P
    • หมายเลขชิ้นส่วนของผู้ผลิต / Mfr. Part No. MCP79400-I/MS
    Each (Supplied in a Tube)
    THB40.394
    Microchip
    -
    D:M:Y, DW
    HH:MM:SS
    -
    Serial-I2C
    Surface Mount
    MSOP
    8
    3 x 3 x 0.95mm
    -
    3mm
    3mm
    0.95mm
    5.5 V
    • RS Stock No. 177-0656
    • หมายเลขชิ้นส่วนของผู้ผลิต / Mfr. Part No. MCP79400-I/MS
    Each: (In a Pack of 10)
    THB40.394
    Microchip
    -
    D:M:Y, DW
    HH:MM:SS
    -
    Serial-I2C
    Surface Mount
    MSOP
    8
    3 x 3 x 0.95mm
    -
    3mm
    3mm
    0.95mm
    5.5 V
    • RS Stock No. 177-0302
    • หมายเลขชิ้นส่วนของผู้ผลิต / Mfr. Part No. MCP79400-I/MS
    Each (In a Tube of 100)
    THB36.864
    Microchip
    -
    D:M:Y, DW
    HH:MM:SS
    -
    Serial-I2C
    Surface Mount
    MSOP
    8
    3 x 3 x 0.95mm
    -
    3mm
    3mm
    0.95mm
    5.5 V
    • RS Stock No. 798-5260P
    • หมายเลขชิ้นส่วนของผู้ผลิต / Mfr. Part No. MCP79412-I/SN
    Each (Supplied in a Tube)
    THB55.132
    Microchip
    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
    • RS Stock No. 798-5260
    • หมายเลขชิ้นส่วนของผู้ผลิต / Mfr. Part No. MCP79412-I/SN
    Each: (In a Pack of 5)
    THB55.132
    Microchip
    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
    • RS Stock No. 191-3504P
    • หมายเลขชิ้นส่วนของผู้ผลิต / Mfr. Part No. DS1339AU+
    Each (Supplied in a Tube)
    THB230.31
    Maxim Integrated
    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
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