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HCF4022B Scheda tecnica(PDF) 7 Page - STMicroelectronics |
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HCF4022B Scheda tecnica(HTML) 7 Page - STMicroelectronics |
7 / 12 page Typical Output Low (sink) Current Characteristics. Minimum Output Low (sink) Current Characteristics. Typical Output High (source) Current Charac- teristics. Minimum Output High (source ) Current Charac- teristics. TYPICAL APPLICATIONS Divide by N Counter (N ≤ 10) with N Decoded Out- puts. When the N th decoded output is reached (Nth clock pulse) the S-R flip-flop (constructed from two NOR gates of the HCC/HCF4001B) gener- ates a reset pulse which clears the HCC/HCF4017B to its zero count. At this time, if the N th decoded output is greater than or equal to 6, the COUT line goes high to clock the next HCC/HCF4017B counter section. The ”0” decoded output also goes high at this time. Coin- cidence of the clock low and decoded ”0” output high resets the S-R flip flop to enable the HCC/HCF4017B.Ifthe N th decoded output is less than 6, the COUT line will not go high and, therefore, cannot be used. In this case ”0” decoded output may be used to perform the clocking function for the next counter. HCC/HCF4017B/4022B 7/12 |
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