DS1302 Real Time Clock RTC Module for use with CR2032 - 31 x 8 RAM
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DS1302 Real Time Clock RTC Module for use with CR2032 - 31 x 8 RAM

Vendor: Server On The Move
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$4.98
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This cute little Realt-Time clock module features a DS1302 

trickle-charge Timekeeping Chip and is powered by a 32.768kHz Crystal and a battery holder for a CR2032 Button Battery. It can also be powered directly from a backup power source.

SPECIFICATION

DS1302 trickle-charge Timekeeping Chip

  • Completely Manages All Timekeeping Functions
    • Real-Time Clock Counts Seconds, Minutes, Hours, Date of the Month, Month, Day of the Week, and Year with Leap-Year Compensation Valid Up to 2100
    • 31 x 8 Battery-Backed General-Purpose RAM
  • Simple Serial Port Interfaces to Most Microcontrollers
    • Simple 3-Wire Interface o TTL-Compatible (VCC = 5V)
    • Single-Byte or Multiple-Byte (Burst Mode) Data Transfer for reading or writing of Clock or RAM Data
  • Low Power Operation Extends Battery Backup Run Time
    • 2.0V to 5.5V Full Operation
    • Uses Less Than 300nA at 2.0V

Board

  • DS1302 chip
  • Battery Holder
  • DS1302 Chip breakout PINs for the 3-wire interface and additional  backup power
  • 32.768kHz Crystal