TDA7266 instead TDA7266M

[OIsai.1]

I need to fix an audio amplifier that uses a TDA7266M. Unfortunately, I can only find TDA7266 (stereo version) in stores in my city. I compared the pins and it seems that I can use one channel without any modifications. What should I do with a disconnected channel? Is it enough to connect the input via a capacitor to ground?

[Peter BENSCH · Accepted solution]

Welcome, @OIsai.1​, to the community!

Yes, you can use a TDA7266 instead of the TDA7266M and connect the second input (pin 12) to GND via a small capacitor.

Hope that helps?

Regards

/Peter

[OIsai.1]

Hi Peter.

Thank you for your reply. Admittedly, I waited a long time for an answer and I have already successfully completed the repair in an identical way, but this is a valuable confirmation that the amplifier will continue to work as before.

I have been working with ST components for a very long time, since the beginning of the 80s. At that time it was SGS 🙂 I have always liked the simplicity of implementation and the reliability of the components. The only thing I regret is that you stopped producing some chips, for example the TDA2030-2050 series in the TO-220 housing.

Best regards,

Oliver

[Peter BENSCH]

You're welcome!

Yes, when worldwide sales have become too small and production is no longer profitable, unfortunately sometimes devices have to be discontinued. However, there are now some approaches to guarantee long-term availability - up to 15 years for some automotive components. Sometimes this counts from the launch date, sometimes as a rolling commitment, details can be found on the respective product website.

If the problem is solved, please mark this thread as answered by selecting Select as best, as also explained here. This will help other users find that answer faster.

Good luck!

/Peter