I2C real-time clock with 56-byte battery-backed SRAM in DIP-8 package. Tracks seconds, minutes, hours, day, date, month, and year; automatic leap-year compensation. Requires 3V backup cell on VBAT pin; runs from 5V supply.

Pinout

Logical pinout · physical placement not verified
DS1307 DIP-8X1SDAX2SCLVBATSQWOUTGNDVCC
  • X11
    Type · Signal
  • X22
    Type · Signal
  • VBAT3
    Type · Power
  • GND4
    Type · Ground
  • SDA5
    Type · I2C
  • SCL6
    Type · I2C
  • SQWOUT7
    Type · Signal
  • VCC8
    Type · Power

Bare ICs

67 other options

74HC logic gates, MCP3008/MCP23017 ADCs and expanders, 24LC256 EEPROM, 4N25-series optocouplers and ULN2803A drivers — bare DIP chips with no breakout-board conveniences like pull-ups or level shifting.

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