Real Time Clock Multiplexed 114Byte 24-EDIP Package

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Multiplexed Real Time Clock


  • Counts seconds, minutes, hours, days, day of the week, date, month, and year with leap year compensation valid up to 2100
  • Binary or BCD representation of time, calendar, and alarm
  • 12- or 24-hour clock with AM and PM in 12-hour mode
  • Daylight Savings Time option
  • Selectable between Motorola and Intel bus timing
  • Multiplex bus for pin efficiency
  • Interfaced with software as 128 RAM locations
    • 14 bytes of clock and control registers
    • 114 bytes of general purpose RAM
  • Programmable square wave output signal
  • Three interrupts are separately software-maskable and testable
    • Time-of-day alarm once/second to once/day
    • Periodic rates from 122 ms to 500 ms
    • End of clock update cycle


  • Operating temperature: 0°C to 70°C
  • Mounting: through hole
  • Pin count: 18-Pins
  • Package: 24-DIP encapsulated
  • Dimensions: 34.04mm (L) x 18.8mm (W) x 9.4mm (H) (max)
  • Bus type: multiplexed
  • Minimum operating supply voltage: 4.5V
  • Typical operating supply voltage: 5V
  • Maximum operating supply voltage: 5.5V

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Specification Value
Supplier PackageEDIP-24
Bus TypeMultiplexed
Date FormatDW:DM:M:Y|Binary
Time FormatHH:MM:SS|Binary
User RAM114Byte
Minimum Operating Supply Voltage4.5V
Typical Operating Supply Voltage5V
Maximum Operating Supply Voltage5.5V
Minimum Operating Temperature0°C
Maximum Operating Temperature70°C
Screening LevelCommercial
MountingThrough Hole
Product Width18.8mm(Max)
Product Height9.4mm(Max)
Product Length34.04mm(Max)
Product TypeReal Time Clock

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