Modulus of Counter is the total number of U nique States it should pass through in one complete Counting Cycle. Mod represent Modulus of Counter and n belongs to an integer. the Decimal number 10 is replaced by there equivalent Binary Code 1010 mod-n : It Simply means the Decimal number is replaced by their Equivalent Binary Code. for e.g. BCD :īCD Stands for Binary Coded Decimal. It is a continuous high-low signal and is represented as a square waveform. If all the Clock Input of the Flip-Flops are driven(controlled) by the same Clock Signals(Pulse) then the Counter is Defined as S ynchronous Counters. If all the Clock Input of the Flip-Flops are not driven(controlled) by the same Clock Signals(Pulse) then the Counter is Defined as Asynchronous Counters. In Counters ICs there are so many Clock Inputs that are present based on the Internal Structure of Flip-Flops. That’s why we need to know some basic terminology while Designing any of Counter. In the discussion of Counter ICs, some basic terms will be used a lot. These names are given based on the Functionality and Working Principle of IC 7490. IC 7490 is also known as BCD Counter, Decade Counter, and mod-10. In this article, we are going to study IC 7490 Decade Counter Circuit. IC 7490 is Asynchronous mod-10 Counter IC.
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