Can you identify this 14-pin IC in tone detector circuit from the schematic?

[Externet]

Hi am looking for a similar functionality of a CD4046 IC but in 14 pins. Any family as CAxxx, CDxxx, MCxxx or else.
Do you have suggestions ?

This is a very, very difficult question but gave up on other means to locate/search such probable chip. It is for a proven good working prototype/evaluating board for audio tones detection with its only IC missing and unknown; trying to put it back to work. A huge nightmare to solve. Not DTMF related! Circuit is unique, not copied from any publication.

Pin 14 = +
Pin 7 = Gnd
Pins 8, 10 = inputs
No other pin gets +
No other pin grounded.
No clock nor crystal driven

ANY help is welcome along the pin guidelines above. I have exhausted my capabilities of searching a match

 

[KrisBlueNZ]

It's hard to say without a schematic of how it's used. It could just be a gate IC being used as a phase comparator, or a monostable, or something like that. Or it could be a microcontroller with an internal clock oscillator. Show us a schematic of that part of the circuit, including the power supply voltage, and we may be able to suggest something.

 

[Externet]

Thanks KrisBlue. Take a NervoCalm and
----> http://s588.photobucket.com/user/Innernet/media/DSCF0035.jpg.html?sort=6&o=44

The apparent 'chaining' of passive components (feedbacks, tuning, gain, ...) came to be like that just because coincided with a compact layout in the connections.
Audio input is pins 8, 10.
Outputs are only for LEDs.
Circuit does nothing else than showing the presence of 2 audio tones. The tones shift is selected by the trimmer potentiometer. A single tone turns on one pair of LEDs. Another tone, the other pair. (AC)
Simoultaneous tones, all LEDs get on.
There is a chance outputs are complimentary; or from four op-amps in the IC.



[Moderator edit to include the image in the post -- KrisBlueNZ]

 

[KrisBlueNZ]

Ah, I see what you mean now. No, I don't recognise it, sorry. What is the power supply voltage?

Perhaps someone will come across this thread later and recognise the device. I'll update the subject to make it more enticing.

 

[Externet]

Hi.
Sorry, but changing the title may not bring much good in my opinion. Because may mislead.
If the IC was a dual tone detector for sure, perhaps I would have found it. I wish it was. Hope for your clues.
The exact description is, It is an adjustable dual tone detector AFSK circuit; but not the IC.

I designed the circuit by studying a data sheet; I built it; I tested; and became happy with the unexpected results.
Why unexpected ? Because the 'mystery' IC was not intended to do that or used that way. Was an odd application I came up with.
It is not a obscure IC; it is not a supercommon one. Weird how the mind remembers some things and not others.

The nearest similar IC pinout I have seen is the CD4046. But am looking for something similar in 14 pin, as was titled.

All the data to backtrack its identity was graciously destroyed by my email provider mail.com when they upgraded their 'system' They said 'we are sorry' and I lost over 100 emails. That plus a couple of moves and shipping that IC as I had only one; delaying the re-order resulted in this brain fart .

 

[KrisBlueNZ]

Sorry, but changing the title may not bring much good in my opinion. Because may mislead.

OK, I've made it less misleading!

I designed the circuit by studying a data sheet; I built it; I tested; and became happy with the unexpected results. Why unexpected ? Because the 'mystery' IC was not intended to do that or used that way. Was an odd application I came up with. It is not a obscure IC; it is not a supercommon one. Weird how the mind remembers some things and not others.

OK. Well, those comments could be a useful hint as well.

The nearest similar IC pinout I have seen is the CD4046. But am looking for something similar in 14 pin, as was titled.

A CD4046 wouldn't do that. BTW, what are the frequencies?

All the data to backtrack its identity was graciously destroyed by my email provider mail.com when they upgraded their 'system' They said 'we are sorry' and I lost over 100 emails. That plus a couple of moves and shipping that IC as I had only one; delaying the re-order resulted in this brain fart .

Bummer!

 

[davenn]

I designed the circuit by studying a data sheet; I built it; I tested

OK ... this doesn't make sense

how the hell can you build and test a circuit from a datasheet and not know what the IC is ??

 

[KrisBlueNZ]

It was a long time ago and he's forgotten. Now he's lost the data sheet.

 

[davenn]

It was a long time ago and he's forgotten. Now he's lost the data sheet.

I didn't catch that bit