Need help with CD4059A "Divide-By-N" chip

[Guest]

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.

 

[Ken Smith]

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.

Wire one up and play with the K and M inputs until it does what you want
then do the PCB.

 

[Tony Williams]

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.

If this is not a homework question and you really do
need to implement a fixed divide by 1000, then the
better answer might be to use 3x 4017 decade dividers
in cascade. They will take about the same pcb area
as one 4069.

 

[Fred Bloggs]

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 is an LE or Latch Enable input not shown- tie it low for
continuous pulse output operation. The output is a pulse one clock cycle
wide occurring at frequency shown:

View in a fixed-width font such as Courier.




DIVIDE BY N=1000 x N +100 x N +10 x N + N
1000 100 10 1

74HC4059
+-----------------+
-----| J1 |
-----| J2 |
N -----| J3 |
1 -----| J4 |
| |
-----| J5 |
-----| J6 |
N -----| J7 |
10 -----| J8 |
| |
-----| J9 | Fin
-----| J10 Q |---> Fout= ---
N -----| J11 | N
100 -----| J12 |
| |
-----| J13 |
-----| J14 |
N -----| J15 |
1000 -----| J16 |
| |
| |
Fin-----| CP |
| |
| |
| KA KB KC |
+-----------------+
| | |
| | |
| | |
H H L







DIVIDE BY 1000=1000 x 1 +100 x 0 +10 x 0 + 0


74HC4059
+-----------------+
L -----| J1 |
L -----| J2 |
'0' L -----| J3 |
L -----| J4 |
| |
L -----| J5 |
L -----| J6 |
'0' L -----| J7 |
L -----| J8 |
| |
L -----| J9 | Fin
L -----| J10 Q |-> Fout= ---
'0' L -----| J11 | 1000
L -----| J12 |
| |
H -----| J13 |
L -----| J14 |
'1' L -----| J15 |
L -----| J16 |
| |
| |
Fin-----| CP |
| |
| |
| KA KB KC |
+-----------------+
| | |
| | |
| | |
H H L

 

[Tam/WB2TT]

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.

You might mention what frequency you want this to work at. The 4XXX parts
are not very fast.

Tam

 

[Tam/WB2TT]

If this is not a homework question and you really do
need to implement a fixed divide by 1000, then the
better answer might be to use 3x 4017 decade dividers
in cascade. They will take about the same pcb area
as one 4069.

Makes sense, or a pair of 74HC390 dual decade counters. Not sure why he want
to use a programmable counter for a single value. Also, he will save money
with either the 390 or the 4017 over the 4059 unless he has a drawer full of
them.

Tam

 

[Mark Zenier]

You might mention what frequency you want this to work at. The 4XXX parts
are not very fast.

There's an HC version of it, but I think only TI makes it.

Mark Zenier [email protected] Washington State resident