Design And Construction Of The Frequency Divider Using 7490 Decade Counter
Volume 3 - Issue 7, July 2019 Edition
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Author(s)
May Zaw Tun, Ei Ei Minn
Keywords
7490 decade counter, 7404 hex inverter, 10 MHz crystal
Abstract
A frequency divider is a circuit that divides a giving frequency by a factor of n, where n is an integer. Clock frequency dividers generate slower clocks from a faster reference. A frequency divider circuit is a simple clock frequency divider circuit, designed with readily available electronic components. This circuit is based on TTL ICs. It consumes very low power in quiescent state. It consists of a 10MHz crystal oscillator, a hex inverter IC 7404, seven decade counter ICs 7490 and other electronic components. The heart of the frequency divider circuit is seven 7490 decade counters in cascade. Input frequency 10 MHz is reduced to 1Mz through 1Hz by using seven decade counter ICs.
References
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