XR2206 revived by China ?

[rob77]

Hi Guys,

just noticed that ebay is full of new XR2206 chips from China for $3-$5 a piece... but that little beast was discontinued a long time ago... (but mouser got 3 of them on stock for a mere 65 Euro a pop  )

does anyone here has experience with those chinese new chips ? do they work like the original exar chips ? or are those at least close enough ?


R.

[JoeO]

I just saw today that Tayda has them for sale:

http://www.taydaelectronics.com/ic-integrated-circuits/specialized-function/xr-2206-xr2206cp-xr2206-monolithic-function-generator-ic.html

[rob77]

i will definitely add 2-3 pieces into my next order , in worst case i will use them as decoration

i doubt those are NOS, otherwise the price would be in the same ballpark as mouser.

[amyk]

Jameco too:
http://www.jameco.com/webapp/wcs/stores/servlet/Product_10001_10001_34972_-1

Maybe someone discovered a huge stock of them abandoned somewhere...

[magetoo]

I just saw today that Tayda has them for sale

I threw in a couple with my order from them this summer.  Have they been discontinued for long?  I kind of assumed there were droves of them around, so this thread has come as a surprise.

[calexanian]

Most likely old stock. Exar gave a lot of warning when they phased it out. Lots of time for people to stock up. Now that enough time has passed the bulk distributors in the east are probably letting them go. It would however be a good part for somebody like a Princeton technologies or some other niche analog company to make litho for, if the hobbyist market were there for it. Otherwise with cheap fast processing power and good low cost D/A converters you can write a piece of software to DDS that signal and have it lower in distortion than a 2206 could ever do. 

[rob77]

sure there are better solutions but nothing can beat the simplicity of xr2206.
btw it's discontinued long enough - no major distributor have them (except mouser 3pcs @ 65Eur).

but anyways... ordered few of those from China - let's see in few weeks once delivered

[dannyf]

Most likely old stock.

Most likely brand new design - functional equivalent to the old design.

China sports the most IC design houses in the world. If there is a demand, some smart people will fill it. That's the beauty of capitalism.

[JoeO]

I just saw today that Tayda has them for sale

I threw in a couple with my order from them this summer.  Have they been discontinued for long?  I kind of assumed there were droves of them around, so this thread has come as a surprise.

What is the date code on your chips?

[magetoo]

Good idea JoeO, should have checked that already.  Let's see... it says 0919.

Have nothing to compare with, but I would assume NOS.

[calexanian]

Most likely old stock.

Most likely brand new design - functional equivalent to the old design.

China sports the most IC design houses in the world. If there is a demand, some smart people will fill it. That's the beauty of capitalism.

That would be handy for hobbyists. If that is the case they should advertise that they are new parts under their own name. Would be a good entrance to the market to introduce a chip company previously not well known in the west..

[dannyf]

If that is the case they should advertise that they are new parts under their own name.

Some of them do - like LDOs or specialty chips that sell for the millions.

But it is much easier to market under a known name, like XR2206, than GQ420,

[VK3DRB]

Most likely old stock.

Most likely brand new design - functional equivalent to the old design.

China sports the most IC design houses in the world. If there is a demand, some smart people will fill it. That's the beauty of capitalism.

China is a communist country, not capitalist. President Xi Jinping, is the General Secretary of the Communist Party of China. The country is ruled by the Communist Party of China, whose power is enshrined in China's constitution. Granted, their form of communism is perverse and corrupt.

As for the XR2206, it is a great device. But with a decent microcontroller, you should be able to make a function generator than is more powerful... triangle, square, sine wave or anything you want. And you can make it triggerable, and have multiple outputs. And have a programmable pulse train. For a fraction of the price, excluding the labour to write the code. That latter point makes the XR2206 a good device if you want to get something robust up and running quickly.

[miguelvp]

China is a communist country, not capitalist.

Sure but
http://en.wikipedia.org/wiki/Jack_Ma

is worth $29.7 billion 

[blackdog]

Hi, 


I designed more than a year ago this little sinus/square wave generator for a special test setup.
It is using a XR2206 and give's desend output signals, not like most of the schematics you wil find on the Internet.

1e
The output is 50 Ohm independend of the output settings.

2e
3 overlapping ranges , 10Hz to 500Hz, 100Hz to 5Khz and 1Khz to 50Khz.

3e
Low cost part and high quality output signals.

4e
The squarewave output is also bufferd, high quality square wave's, see the picture's

5e
Easy to build

6e
Ouput range is from 0,27mV to 34mV and 27mV to 3,4V RMS

Use the components in this schematic, dont ask if you can replace the NE5534a whit a uA741 
I used al lot of time to disign this generator the way it is now, simpel easy to build en with good quality output signals.
This is the best you can get out of a XR2206 for a generator from 10Hz tot 50Khz.
It is part of een testsetup for testen loopgain of power supply's and i  needed a battery-powered generator. (commonmode problems)

Schematic


Test setup


10Khz Sinus



10Khz Square



50Khz Sinus Max Output.



50Khz Square Max Output.



50Khz Sinus Max Output.



3,3Khz Square wave, 40dB attunator on, no overshoot!!


1Khz Sinus wave, "0" dB ouput, almost perfect sinus, about 0,5% distortion, if you look careful you can just see a smal abbaration on the top
of the sinus wave...
It was not "simpel" to remove this abaration without  affecting the frequentie respons to much.


I read the frequentie of the generator on one of my counters, on top is the generator and the bottom box is a dual 40dB wide band,
low noise measuring amplifier to test the stability of power supply's.


Build on a proto typing board.


Build in a CISCO PIX Firewall box, battery powered.



Have fun with it!


Kind regarts,
Blackdog

[dannyf]

-
China is a communist country, not capitalist. President Xi Jinping, is the General Secretary of the Communist Party of China. The country is ruled by the Communist Party of China, whose power is enshrined in China's constitution. Granted, their form of communism is perverse and corrupt-

This must be posted by someone IN the 1960s.

It is sure proof that time travel is possible.

[echen1024]

-
China is a communist country, not capitalist. President Xi Jinping, is the General Secretary of the Communist Party of China. The country is ruled by the Communist Party of China, whose power is enshrined in China's constitution. Granted, their form of communism is perverse and corrupt-

This must be posted by someone IN the 1960s.

It is sure proof that time travel is possible.

China is hugely capitalist. Many former state-owned corporations are now corrupt, privately owned companies that milk money from the state in the form of subsidies.

[Yansi]

I just saw today that Tayda has them for sale:

http://www.taydaelectronics.com/ic-integrated-circuits/specialized-function/xr-2206-xr2206cp-xr2206-monolithic-function-generator-ic.html

Oh, fuck that crap! Maybe a year or two ago, I bought two from Tayda. They DID NOT WORK properly.  It is therefore highly expected, these are reviewed or another way fucked by china, not original. I have been playing with them for a looong time, hardly getting any oscillation. Then I've found, that lowering supply voltage just under 10V or so made it working. CRAP!

Better try another type of func gen. Anyone tried ICL8038? I've just come across that part a few days ago.

[dannyf]

-They DID NOT WORK properly.  -

Sounded more like you couldn't make it work.

[Yansi]

How can I make the chip workin, if it just looses oscillation above 10V and begins drawing more current?  Just standard schematic, like the one in datasheet page 8.  It worked, but only with a very low supply voltage. Why? Your guess is good as mine.

...Thrown them away and made func gen out of opamps, with sinewave beeing shaped on a JFET-diode network. Not the best concept, but worked, unlike the chinese fake chip.

[dannyf]

-. Why?-

There is more to a working circuit than the right parts or the right schematic.

Otherwise, every datasheet writer would be the greatest engineer.

[Yansi]

Shouldn't you do a philosopher?   

[echen1024]

Otherwise, every datasheet writer would be the greatest engineer.

Well, I do suppose datasheet errors are to add some spontaneity to an otherwise regulated EEs life?

[calexanian]

I just saw today that Tayda has them for sale:

http://www.taydaelectronics.com/ic-integrated-circuits/specialized-function/xr-2206-xr2206cp-xr2206-monolithic-function-generator-ic.html

Oh, fuck that crap! Maybe a year or two ago, I bought two from Tayda. They DID NOT WORK properly.  It is therefore highly expected, these are reviewed or another way fucked by china, not original. I have been playing with them for a looong time, hardly getting any oscillation. Then I've found, that lowering supply voltage just under 10V or so made it working. CRAP!

Better try another type of func gen. Anyone tried ICL8038? I've just come across that part a few days ago.

Those and the MAX038 are all discontinued as well.

[VK3DRB]

-
China is a communist country, not capitalist. President Xi Jinping, is the General Secretary of the Communist Party of China. The country is ruled by the Communist Party of China, whose power is enshrined in China's constitution. Granted, their form of communism is perverse and corrupt-

This must be posted by someone IN the 1960s.

It is sure proof that time travel is possible.

http://geography.about.com/od/lists/tp/communistcountries.htm

The government preaches communism to keep the proletariat under control, but the ruling elite does whatever will make them money and save face. Comrade Yi XingPing is actually trying to get rid of corruption, but it is a near impossible task because it is so widespread and systemic. Make no mistake, officially the People's Republic of China is communist.

http://www.bloomberg.com/news/2012-02-26/china-s-billionaire-lawmakers-make-u-s-peers-look-like-paupers.html