How does 4059 programmable divide by n counter work?

[Sommes]

I understood it can divide by n from 3 to 15999. However how can I set the
value of n? Thanks

 

[Winfield Hill]

Sommes wrote...

I understood it can divide by n from 3 to 15999. However
how can I set the value of n? Thanks

With wires?

Seriously, you might find the old RCA - Harris cd4059 datasheet
easier to study, here's TI's "acquired" copy, dated 2003,
http://focus.ti.com/docs/prod/folders/print/cd4059a.html

And here's their 74hc4059 datasheet, also acquired from Harris,
http://focus.ti.com/docs/prod/folders/print/cd74hc4059.html

Or maybe you'd prefer the Philips 74hc4059 datasheet,
http://www.semiconductors.philips.com/pip/74HCT4059.html#features

DigiKey has the TI CD4059A 24-pin DIP at $1.35 (qty 100) and
the CD74HC4059M96 (a 24-pin soic package) at $1.48 same qty.
According to TI the CD74HC4059E 24-pin DIP version is in full
production, and is available from two European distributors.
Avnet lists it, but has no stock, wants 60-piece minimum orders.


--
Thanks,
- Win

 

[Paul Burridge]

On Wed, 3 Nov 2004 16:56:02 +1000, "Sommes" <j@jl.com> wrote:

I understood it can divide by n from 3 to 15999. However how can I set the
value of n? Thanks

These chips have what they call "address lines" which are basically
pins set aside for the application of control voltages which determine
the degree of division. The chip just 'looks for' the presence or the
absence of a voltage (usually 5V) on each of those pins, different
combinations of ons and offs give different rates of division. You can
fix the division rate manually by hard-wiring the voltages to the
appropriate pins, or to vary the division you can use a rotary encoder
switch, or a microprocessor or whatever.

--

"What is now proved was once only imagin'd." - William Blake, 1793.