Connecting a CD40193 Counter

105

00:56:29

wiring for CD40193 presettable synchronous up/down counter.
- LOAD input is inverted, must be held high or it won't count.  if LOAD is floating, weird crap happens. 
- COUNT UP/DOWN inputs are held high.  clock one or the other.  don't leave either floating around either or it'll do weird stuff. 
- RESET input has to be held low.  don't float it. 
- DATA 1/2/4/8 might as well be low too, I didn't notice any weird effects with these floating though.  probably safer to hold them low. 
- output source current through 1k resistors is about 5ma at 5V, I wouldn't go above this.  it should probably be less. 

published 10 years ago

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