car clock

The E1109 COSMOS IC contains all the functions necessary for a 12 or 24 hour clock. It incorporates an oscillator circuit requiring only an external 4.194304 MHz crystal and trimmer capacitor for operation. The display outputs are multiplexed, and common cathode LED displays can be d riven via single transistor buffer stages. A 1 second output is available to drive a flashing LED, and an output is also available that gives one pulse every 24 hours. Control inputs are provided in the form of reset (to 0.00), stop, slow and fast forward cycle, for setting the correct time. The circuit will operate on supplies up to + 15 volts.