Re: dialer chip NTE1691

On Tue, 29 Apr 2008, lerameur wrote:

Hello,

I would like to use a dialer chip the NTE1691. Can some tell me how to
use the RC pin, There a three pins used ar reference frequency, The
data*** does not say how to hook them up (RC), and also it do not
talk about the output frequencies for dialing.
http://www.datasheetcatalog.com/datasheets_pdf/N/T/E/1/NTE1691.shtml
anyone has a circuit configuration.. a schematic or a better
data***
thank you
ken

If it doesn't tell you how to hook it up, then that's it.

NTE is a replacement line, intended to replace existing components.
You look the part up in the cross-reference, find their part, and
pay good money to buy it. The price is a premium to help ensure
you can get it locally, and you're paying for the cardboard that
makes it so easy to handle.

But if NTE doesn't have information about using it, and they never
put "sample circuits" in the replacement guides I have, then you have
to either abandon the project, or find a device that the NTE device replaces, and get the data*** for that original device.

The most accessible method of getting a dialer (I'm assuming you
are talking about telephone dialer), then buy a cheap telephone,
and either use it intact or extract the dialing part. You don't
really need data, since the external components are connected up,
and that will tell you how it's supposed to be hooked up. INdeed,
there is little reason to just pull the IC, you might as well
carve out a chunk of the board (if for whatever reasons you can't
leave the phone intact) and use it as a module.

Michael

.