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                                                                                                                                                         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 

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