Abstract: The present invention relates to a digital control circuit which controls the drive of a load by the use of a clock pulse. More particularly, it relates to an integrated circuit device for combustion control which controls the combustion of a burner in a water heater, an air heater or the like. A combustion control circuit performs an ignition operation for a predetermined time, and stops the supply of fuel in case of misfire. When the reception of the time-keeping clock pulses has stopped within the predetermined time, such predetermined time will become infinite, and in the case of misfire, the fuel supply will continue dangerously.