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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

    276 產品顯示為 Real Time Clocks

    • RS庫存編號 171-0196
    • 製造零件編號 AB1805-T3
    个(每带 3000 )
    HK$9.861
    Abracon
    -
    -
    -
    -
    -
    Surface Mount
    16-VFQFN
    -
    -
    -
    -
    -
    -
    -
    HK$199.00
    STMicroelectronics
    Battery Backup, Calendar, Chip Deselect, Switch Over, Write Protection
    DW:DM:M:Y
    HH:MM:SS
    8192B
    Parallel
    Through Hole
    PCDIP
    28
    39.88 x 18.34 x 8.89mm
    -
    39.88mm
    18.34mm
    8.89mm
    5.5 V
    • RS庫存編號 511-103
    • 製造零件編號 PCF8563TS/4,118
    个(每托盘 5 )
    HK$12.60
    NXP
    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
    • RS庫存編號 219-4634
    • 製造零件編號 PCF2129T/2,518
    个(每带 1000 )
    HK$36.492
    NXP
    -
    D:W:M:Y
    SS:MM:HH
    128bit
    Serial-SPI
    -
    SO16
    16
    -
    -
    -
    -
    -
    -
    • RS庫存編號 219-4638
    • 製造零件編號 PCF8523T/1,118
    个(每带 2500 )
    HK$7.737
    NXP
    Timer
    D:W:M:Y
    SS:MM:HH
    128bit
    -
    -
    SO8
    8
    -
    -
    -
    -
    -
    -
    • RS庫存編號 333-118
    • 製造零件編號 MCP7940NT-I/SN
    个(每带 3300 )
    HK$8.688
    Microchip
    Alarm, Calendar, Clock
    Binary, DW:DM:M:Y
    HH:MM:SS
    64B
    Serial
    -
    SOIC
    8
    -
    -
    -
    -
    -
    -
    • RS庫存編號 171-0195
    • 製造零件編號 AB0805-T3
    个(每带 3000 )
    HK$9.861
    Abracon
    -
    -
    -
    -
    -
    Surface Mount
    16-VFQFN
    -
    -
    -
    -
    -
    -
    -
    个(每带 1000 )
    HK$19.046
    Renesas Electronics
    Alarm, Battery Backup, Calendar, Clock, Power Fail
    DW:DM:M:Y
    HH:MM:SS
    2B
    Serial-I2C
    -
    MSOP
    8
    -
    -
    -
    -
    -
    -
    • RS庫存編號 169-8223
    • 製造零件編號 X1B000301000212
    个(每带 250 )
    HK$17.274
    Epson
    Clock
    -
    SS:MM
    -
    Serial-I2C
    Surface Mount
    -
    10
    3.2 x 2.5 x 1mm
    -
    3.2mm
    2.5mm
    1mm
    5.5 V
    个(每托盘 25 )
    HK$6.404
    NXP
    -
    -
    -
    128 bit, 128 bit
    -
    -
    HXSON8, HXSON8
    8, 8
    -
    -
    -
    -
    -
    -
    个(每带 2500 )
    HK$16.787
    Renesas Electronics
    Alarm, Battery Backup, Calendar, Clock
    YY:MM:DD:dd
    HH:MM:SS
    -
    Serial-I2C
    -
    8-pin MSOP
    8
    -
    -
    -
    -
    -
    -
    个(每带 2500 )
    HK$16.667
    STMicroelectronics
    Calendar
    D:D:M:Y:C
    HH:MM:SS:HSS
    20B
    Serial-I2C
    Surface Mount
    SOIC
    8
    5 x 4 x 1.5mm
    -
    5mm
    4mm
    1.5mm
    5.5 V
    个(每带 2500 )
    HK$14.222
    STMicroelectronics
    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
    • RS庫存編號 823-7954
    • 製造零件編號 MCP79511-I/MS
    个(每托盘 5 )
    HK$13.70
    Microchip
    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
    个(每带 2500 )
    HK$16.551
    STMicroelectronics
    Alarm
    Binary
    HH:MM:SS:hh
    20B
    Serial
    Surface Mount
    SOIC
    8
    5 x 4 x 1.25mm
    -
    5mm
    4mm
    1.25mm
    5.5 V
    HK$198.60
    STMicroelectronics
    Battery Backup, Calendar, Chip Deselect, Switch Over, Write Protection
    DW:DM:M:Y
    HH:MM:SS
    8192B
    Parallel
    Through Hole
    PCDIP
    28
    39.88 x 18.34 x 8.89mm
    -
    39.88mm
    18.34mm
    8.89mm
    5.5 V
    • RS庫存編號 165-2097
    • 製造零件編號 MCP79511-I/MS
    毎管:100 个
    HK$13.691
    Microchip
    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
    个(每带 3300 )
    HK$9.317
    Microchip
    Calendar, Clock
    DW:DM:M:Y
    HH:MM:SS
    64B
    Serial-2 Wire, Serial-I2C
    Surface Mount
    TDFN
    8
    3 x 2 x 0.75mm
    -
    3mm
    2mm
    0.75mm
    5.5 V
    • RS庫存編號 219-4641
    • 製造零件編號 PCF8563T/F4,118
    个(每托盘 10 )
    HK$10.39
    NXP
    -
    -
    -
    128 bit, 128 bit
    -
    -
    SO8, SO8
    8, 8
    -
    -
    -
    -
    -
    -
    • RS庫存編號 166-0314
    • 製造零件編號 PCA8565TS/1,118
    个(每带 2500 )
    HK$11.608
    NXP
    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
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