datasheets 74122 free download

File name 74122.pdf

54122 DM74122 Retriggerable Resettable Multivibrator June 1989 54122 DM74122 Retriggerable Resettable Multivibrator General Description The '122 features positive and negative DC level triggering by a LOW signal applied to CD which also prevents trigger- inputs complementary outputs an optional 10 kX internal ing An internal connection from CD to the input gate makes timing resistor and an overriding Direct Clear (CD) input it possible to trigger the circuit by a positive-going signal on When the circuit is in the quasi-stable (delay) state another CD as shown in the Truth Table For timing capacitor values trigger applied to the inputs (per Truth Table) will cause the greater than 1000 pF the output pulse width is defined as delay period to start again without disturbing the outputs follows This process can be repeated indefinitely and thus the out- tw e 0 32 RXCX (1 0 a 0 7 RX) put pulse period (Q HIGH Q LOW) can be made as long as Where tw is in ns RX is in kX and CX is in pF desired Alternatively a delay period can be terminated Connection Diagram Logic Symbol Dual-In-Line Package TL F 10212