I'm curently facing problem with my project using ATMega8-AU TQFP32. I have 100-unit of ATMega8-AU soldered on PCB, and the problem occur at around 20-unit of them. The design just on/off 4 leds, buzzer, and 2 push-on input switches. And the problem is, after around 5 minuts works fine, and then the system become unstabil, buzzer and LEDs on/off randomly uncontrolled. is there someone have experient with this problem?
I already have experient with 100-unit of ATMega8A-PU DIP28 with no problem before. Thanks.