Dallas Semiconductor DS12887+

Multiplexed Real Time Clock

Features

• 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

Specifications

• 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