Microchip Technology Inc

MCP79402

In Production

The MCP79402 general purpose I2CTM Compatible real-time clock/calendar (RTCC) is highly integrated with memory and advanced features normally found in higher priced devices. These features include a battery switchover circuit for backup power, a timestamp to log power failures and digital trimming for accuracy. Using a low-cost 32,768 kHz crystal or other clock source, time is tracked in either a 12-hour or 24-hour format with an AM/PM indicator and timing to the second, minute, hour, day of the week, day, month and year. As an interrupt or wakeup signal, a multifunction open drain output can be programmed as an Alarm Out or as a Clock Out that supports 4 selectable frequencies. In addition to the SRAM memory, there a unique ID that is factory programmed in a locked section of EEPROM with a MAC Address. This ID can also be unlocked and reprogrammed by the end user.

 

    Features

        General purpose RTCC with features that target low power and smart energy applications.

        • Low Power Operation
          • VCC Min = 1.8V
          • Icc < 5 µA Typical Dynamic Current
        • Low Backup Power
          • VBAT Min = 1.3V
          • Ibat < 700nA Typical Timekeeping & SRAM Retention Current
        • Automatic Battery Switchover with Timestamp
          • VCC to VBAT (power lost)
          • VBAT to VCC (power restored)
        • Dual alarms with single Interrupt Output that operates on VCC or VBAT
        • Clock Out frequencies of 32.768, 8.192 & 4.096 KHz and 1 Hz
        • Digital Trimming Range from -127 to + 127 ppm in 1 ppm steps
          • 1 ppm is approximately 86 milliseconds/day
        • EEPROM uses 8 bytes/page with Block Sector write protection
          • Protect none, 1/4, 1/2 or all of array
        • Unique ID is factory programmed with MAC Address
    Parameter Name
    Value
    Max Communications Speed
    400 KHz
    Pin Count
    8
    Minimum Clock Count (seconds)
    1 sec
    Battery-backed SRAM (Bytes)
    64
    Unique ID (bits)
    64
    Unique ID Programming
    EUI-64
    Temperature Range (C)
    -40 to +85
    Documentation
    Data Sheets
    08/17/2016
    865KB
      Errata
     
     
     
     
    Errata
    12/15/2015
    70KB
      Application Notes
     
     
     
    AppNote
    06/23/2016
    154KB
    AppNote
    10/20/2010
    123KB
    AppNote
    03/28/2013
    267KB
    AppNote
    09/13/2016
    303KB
    AppNote
    01/31/2012
    4847KB
    AppNote
    01/25/2013
    246KB
    AppNote
    02/22/2013
    215KB
    AppNote
    09/16/2013
    397KB
    AppNote
    12/01/2015
    161KB
    AppNote
    08/11/2014
    75KB
      Technical Briefs
     
     
     
     
    Tech Briefs
    10/21/2010
    74KB
      Brochures
     
     
     
    Brochures
    07/21/2014
    703KB
    Brochures
    10/27/2010
    141KB
      Gerber Files
     
     
     
     
    Gerber Files
    05/25/2011
    50KB
      Sample Code
     
     
     
    Sample Code
    08/21/2012
    61KB
    Sample Code
    08/21/2012
    152KB
    Pricing & Samples
    All pricing shown in USD only.
    Part Number
    Leads
    Package Type
    Temp Range
    Packing
    1+
    26+
    100+
    1000+
    5000+
    Buy
    Sample
    MCP79402-I/MS
    8
    MSOP
    -40C to +85C
    TUBE
    0.94
    0.87
    0.82
    0.78
    0.75
    MCP79402-I/SN
    8
    SOIC
    -40C to +85C
    TUBE
    0.90
    0.83
    0.79
    0.74
    0.72
    MCP79402-I/ST
    8
    TSSOP
    -40C to +85C
    TUBE
    0.94
    0.87
    0.82
    0.78
    0.75
    MCP79402T-I/MNY
    8
    TDFN
    -40C to +85C
    T/R
    0.98
    0.91
    0.86
    0.81
    0.78
    MCP79402T-I/MS
    8
    MSOP
    -40C to +85C
    T/R
    0.94
    0.87
    0.82
    0.78
    0.75
     
    MCP79402T-I/SN
    8
    SOIC
    -40C to +85C
    T/R
    0.90
    0.83
    0.79
    0.74
    0.72
     
    MCP79402T-I/ST
    8
    TSSOP
    -40C to +85C
    T/R
    0.94
    0.87
    0.82
    0.78
    0.75
     

    ** Device not available to purchase online. Please contact a sales office for pricing information.
    Open a microchipDIRECT account today!

    Development Tools
    • Demo & Eval Boards
    • MCP79410 RTCC PICtail Plus Daughter Board ( AC164140 )

      MCP79410

      The MCP7941X RTCC PICtail™ Plus Daughter Board demonstrates the features and abilities of the MCP7941X and MCP7940X I²C™ Real-Time Clock/Calendar family in standard development platforms. By designing this daughter board with the PICtail Plus, PICtail and PICkit™ serial connectors, it will operate with the Explorer 16 Development Board, the PICDEM PIC18 Explorer Board, the...

    Similar Devices
    Product
    Price5K
    $0.66
    $0.72
    $0.72
    $0.46
    $0.59
    $0.72
    $0.78
    $0.78
    $0.90
    $0.96
    $0.96
    $0.96
    $1.02
    $1.02
    $1.22
    $1.28
    $1.28
    $1.28
    $1.34
    $1.34
    RoHS Information
    Part
    Number
    Device
    Weight
    Shipping
    Weight
    Lead
    Count
    Package
    Type
    Package
    Width
    Solder
    Composition
    JEDEC
    Indicator
    RoHS
     
    China
    EFUP
    MCP79402-I/SN
    0.078000
    0.160000
    8
    SOIC
    .150In(3.90mm)
    Matte Tin
    e3
    MCP79402T-I/SN
    0.078000
    0.230303
    8
    SOIC
    .150In(3.90mm)
    Matte Tin
    e3
    MCP79402T-I/ST
    0.033000
    0.215600
    8
    TSSOP
    4.4mm
    Matte Tin
    e3
    MCP79402-I/ST
    0.033000
    0.090000
    8
    TSSOP
    4.4mm
    Matte Tin
    e3
    MCP79402-I/MS
    0.025600
    0.070000
    8
    MSOP
    3x3mm
    Matte Tin
    e3
    MCP79402T-I/MS
    0.025600
    0.215600
    8
    MSOP
    3x3mm
    Matte Tin
    e3
    MCP79402T-I/MNY
    0.014300
    0.248485
    8
    TDFN
    2x3x0.8mm
    NiPdAu
    e4
    To see a complete listing of RoHS data for this device, please Click here
    Shipping Weight = Device Weight + Packing Material weight. Please contact sales office if device weight is not available.