The voltage of a clock pulse ???

Discussion in 'General Electronics Chat' started by CIX, Aug 27, 2008.

  1. CIX

    Thread Starter New Member

    Aug 27, 2008
    I need to construct my own clock pulse with only batteries and a push button switch but am unsure of the voltage. The IC I need to pulse is the 74LS76 j-k-flip-flops, the frequency is not important.
  2. beenthere

    Retired Moderator

    Apr 20, 2004
    The voltage levels on TTL logic are 0 and +5 volts. LS is good with about .8 volts for low and 4.2 volts for high.
  3. Audioguru

    New Member

    Dec 20, 2007
    The input voltage levels of TTL and LS-TTL gates is a low of 0.8V or less (0.4V is good) and a high of 2.0V or more (2.4V from a TTL output or 2.7V from an LS-TTL output are good.