TCA9803: output low level NG

? ?

Part Number: TCA9803

Tool/software:

SCLA side output

when pin7 low ，pin2 output NG

0 Clemens Ladisch 8 months ago

Guru 317730 points

What do you mean with "NG"?

Please include the voltages at both pins 7 and 2 in the oscilloscope trace.

What is VREF? How long is the trace IIC_SCL1? Are there any capacitors, cables, or connectors on that line?

0 Tyler Townsend 8 months ago

? ?,

Are there any other buffers connected to the B-side of the TCA9803?

Any PU resistors on B-side need to be removed as well.

Regards,

Tyler

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