Hi team,
we are seeing the MODE signal of THVD8000 is off for about 2us, there is a probability of outputting a 0.5us low-level pulse from the R pin. Is there any possibility to cause this pulse?
Green is MODE, purple is R
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Hi team,
we are seeing the MODE signal of THVD8000 is off for about 2us, there is a probability of outputting a 0.5us low-level pulse from the R pin. Is there any possibility to cause this pulse?
Green is MODE, purple is R
Hi Allen,
What is the yellow scope shot represent?
Also if it is possible to share differential bus signal - both the A and B pins would be much appreciated.
Also if possible can you share the schematic being used - please email me if you can't post the schematic on the forum and I can answer you there as well.
Best,
Parker Dodson
Hi Parker
add more details for checking:
When testing THVD8000, we found that the R pin of the chip has a probability of outputting an incorrect level, as shown in the blue line in the figure below.
The green line is R to ground, and the red line is the waveform of chip A to B.
After enlarging the above picture, you can see that when R outputs low level (the maximum low-level pulse width is measured at 1.7us), the voltage between the AB lines is not disturbed, as shown in the figure below.
In addition, the abnormal low level of the R pin appears about 2us after the MODE signal changes from high level to low level, as shown in the figure below.
Red is R to ground, green is MODE to ground.
What is the cause of the above exception? tks for the checking.
Hi Allen,
I haven't seen this issue in the past before from this device - and the behavior does seem pretty odd
Can you please email me the schematic being used so I can verify the configuration of the device - or you can post it here either way works for me.
Also can you post a picture of the top of the unit being tested so I can trace it back into our system.
Best,
Parker Dodson