EDGE_TRIGGERED_MONO

Published:2009/7/2 0:36:00 Author:May | From:SeekIC

Output pulse width is precisely determined by external clock frequency and countdown factor N of 74C193 binary counter (t = N/f). Pulse is generated on rising edge of input, with output remaining high until count N is reached by binary counter. Counter resets and output returns instantly to zero if input pulse goes to zero before count of N. Value of N depends on which two counter outputs are connected to two-input NAND gate. With 74C193, 11 values of N between 1 and 16 are possible; with CD4013, values of N can range from t to 24,576.-R. L. Anderson, Digital One-Shot Produces Long, Accurate Pulses, EDN Magazine, March 5, 1978, p 127.



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