Topic summary
Frequency division
Extracted from the Wikipedia article Frequency divider.
Mixed signal
(Classification:asynchronoussequential logic)
An arrangement of D flip-flops is a classic method for integer-n division. Such division is frequency and phase coherent to the source over environmental variations, including temperature. The easiest configuration is a series where each D flip-flop is a divide-by-2. For a series of three of these, such a system would be a divide-by-8. More complicated configurations have been found that generate odd factors, such as a divide-by-5. Standard, classic logic chips that implement this or similar frequency division functions include the 7456, 7457, 74292, and 74294. (see list of 7400 series and list of 4000 series logic chips)