How would a complete novice at electronics configure a CD4059A Integrated Circuit to divide by 1000?

Answer 1

If you could help with this it would be grate

dansmandr@Yahoo.com wrote in

news:tE22d.18260$_z4.266@fe1.columbus.rr.com: > I need help setting up this to an N factor of 1000. I am trying to lay

> this chip out on a PCB. I have the manufacturer data sheets, but I

> don't understand them.

>

> Any help would be great. There seem to be multiple ways of doing this; here are 5: Ka,Kb,Kc J1 J2 J3 J4 J5 J6 J7 J8 J9 J10 J11 J12 J13 J14 J15 J16

1 1 1 0 0 0 0 0 0 0 0 0 0 0 0 1 0 1 0

0 1 1 0 0 0 0 0 0 0 0 1 0 1 0 0 1 0 0

1 0 1 0 0 0 0 0 0 0 0 0 0 0 0 0 1 0 0

0 0 1 0 0 0 0 1 0 1 0 0 1 0 0 1 0 0 0

1 1 0 0 0 0 0 0 0 0 0 0 0 0 0 1 0 0 0 Use the above to help you understand the datasheets, then check for

correctness - I may well have got it wrong! The only thing that is complicated is the distribution of flipflops to the

first and last counting sections, which is controlled by Ka,Kb,Kc. The

simplest conceptually is Ka,Kb,Kc = 1,1,0 which places the all floating

flipflops in the first counting section (and therefore none in the last). A minor additional complication is that each stage can be preset to a

hexadecimal value, but this is best ignored until you have got the hang of

things. RCA application note ICAN-6374 (dating from 1976) is helpful, but I expect

it is out of print :-( Usual disclaimers apply. ------------------------------------------------------------------------- in mode 5 setup would be

LE=0

Ka=1

Kb=0

Kc=1

J1,2,3,4,5,6,7,8,9,10,11,12,13,14=0

J15=1

J16=0 ------------------------------------------------------------------------- > So, if you use mode 4 with N = 1000, the preset value equals 1000 / 4 =

250

> remainder 0

> which implicates that:

> - Mode selection inputs (Ka->Kc) have to be: LHH (mode 4)

> - Remainder inputs for mode 4 (J1 -> J2) have to be: LL (no remainder)

> - Resultant inputs for mode 4 (J3 -> J16) have to be: LL LLLL LHLH LLHL

> (BCD-notation of 250)

Mark Van Borm