Just came across this site because of the information below. Found some valuable info and leads to help me. Thanks.
Recently smoked this chip in an analog/Digital Trainer and ordered some replacements on line, none of them worked in the existing circuit. I downloaded the data sheet for the chip and breadboarded the sample circuits and tried the chips in them, with little or no success. Eventually I found by adjusting the supply voltage, and the values of the external resistors and caps I could get them to a least partially function. I noticed that the original chip had a batch number of F0918 and the ones I received had a batch number of F0919 and were from china. I had a second Function Generator that used the same chip, so I pulled it and tried it in the unit I smoked the chip in and it works just fine. I than tried it in the test circuits from the data sheet and it also worked fine in them. I found a source for the chips stateside, called and customer service checked stock and confirmed their stock had batch number F0918. Ordered and received them they work just fine.
Bottom line here is my experience with the china version of XR2206 is the external components must be custom selected for the particular chip and will not work as a suitable substitute for XR2206cp F0918. Also, I was never able to get the FSK circuit on the china version to work no matter what I did.
I know the previous posts regarding this chip are old but since china started making this chip maybe this will save some people some time and aggravation.
Recently smoked this chip in an analog/Digital Trainer and ordered some replacements on line, none of them worked in the existing circuit. I downloaded the data sheet for the chip and breadboarded the sample circuits and tried the chips in them, with little or no success. Eventually I found by adjusting the supply voltage, and the values of the external resistors and caps I could get them to a least partially function. I noticed that the original chip had a batch number of F0918 and the ones I received had a batch number of F0919 and were from china. I had a second Function Generator that used the same chip, so I pulled it and tried it in the unit I smoked the chip in and it works just fine. I than tried it in the test circuits from the data sheet and it also worked fine in them. I found a source for the chips stateside, called and customer service checked stock and confirmed their stock had batch number F0918. Ordered and received them they work just fine.
Bottom line here is my experience with the china version of XR2206 is the external components must be custom selected for the particular chip and will not work as a suitable substitute for XR2206cp F0918. Also, I was never able to get the FSK circuit on the china version to work no matter what I did.
I know the previous posts regarding this chip are old but since china started making this chip maybe this will save some people some time and aggravation.