logic diagram of ic 7493 datasheet & applicatoin notes logic diagram of ic 7493 datasheet, cross reference, circuit and application notes in pdf format. DM5490/DM7490A, DM7493A Decade and Binary Counters PDF file’90A Switching Characteristics at VCC e 5V and TA e 25§C (See Section 1 for Test Waveforms and Output Load) From (Input) RL e 400X Symbol Parameter To (Output) CL e 15 pF Units Min Max fMAX Maximum Clock A to QA 32 MHz Frequency BtoQB 16 tPLH Propagation Delay Time AtoQA 16 ns Low to High Level Output tPHL Propagation Delay Time AtoQA 18 ns High to Low Level Output Circuit Diagram Of Digital Clock Using Counters A digital clock is shown named as circuit diagram of digital clock using counters! It’s my st& that just looking at the circuit diagram & replicating it on a bread-board is not what electronics is about. Almost all digital circuits from traffic lights etc. to even computers are all based on sequential logic (its importance).