Hi guys

Not sure if you guys came across this before, the PIC24FJ128GA610 stop working when over a certain voltage level.

I have tested two different:

• Chip 1 - stop working when VCC >= 3.25V, start working again if I lower the voltage
• Chip 2 - stop working when VCC >= 3.40V, start working again if I lower the voltage

Both chip tested on my own PCB, I actually by pass my voltage regular when I tested it. Both chip version is A3. All the VCC and GND got a 1n and 100n by pass cap. and 10uF on the Vcore where is required.

Any thought?

 

Where are you measuring Vcc?
Can you confirm that your DVM is accurate?

 

Where are you measuring Vcc?
Can you confirm that your DVM is accurate?

I think my DVM is correct, as the reading is same as my power supply. Unless both reading are wrong, and their offset/error rate are the same as well.