• DS1302 Timekeeping Chip with 32Khz crystal

The DS1302 trickle-charge timekeeping chip contains a real-time clock/calendar and 31 bytes of static RAM. It communicates with a microprocessor via a simple serial interface.

Only three wires are required to communicate with the clock/RAM: CE (chip enable), I/O (data line) and SCLK (serial clock). Data can be transfered to and from the clock/RAM 1 byte at a time, or in a burst of up to 31 bytes. The DS1302 is designed to operate on very low power, and retain the data and clock information on less than 1 µW.

A 32.768 kHz (+/- 20ppm) Cylindrical Crystal with a 6 pF load capacitance is included.


  • Counts seconds, minutes, hours, date of the month, month, day of the week, and year
  • Leap-Year Compensation Valid Up to 2100
  • Supports 24 hour mode or 12 hour mode with AM/PM indicator
  • 31 byte of static RAM 
  • Package Type: 8-pin DIP

Key Specifications:

  • Power Requirements: 2 to 5 VDC; less than ~300 nA
  • Communication: TTL-compatible 3-wire synchronous serial 
  • Operating Temperature: -32° to +185° F (-0° to + 70° C)
  • Dimensions: 0.4 x .025 in (10 x 6.4 mm)

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DS1302 Timekeeping Chip with 32Khz crystal

  • Product Code: DS1302 Timekeeping Chip
  • Availability: In Stock
  • Rs.450.00