TS5A3160: is there a boby diode between COM and NO/NC?

mux_problem.pptx

Hi Rami

I have desoldered this part and re-measured it. It is OK. Attached file is PCB and schematic. Please help to review what happen.

TDS1+ and TDS1- connect a resistor, 10KOhm.

I measure NO/NC and COM because there is cross-talk between NO and NC. Please help review it.

Hi Allen,

Are you asking why you measure a diode when the device was soldered? What was the supply on device when you did this? Is the device functioning properly?

Thanks,
Rami

Hi Rami

I don't know why. I measured it because the oscillator is unnormal. Maybe this IC is brloken when oscillator is turned on.

There are 2 this kind of circiuts on the PCBA, but the other one work normally.

TS5A3160 is supplied by TLV741P. 

You can refer to schematic. 

VIN=5V, Vout=3.3V @TLV741P

Hi Allen,

I'm sorry, I'm having a hard time following what you're asking here. 
Can you please clarify what your issue is? 
If you're asking me to look into why there's crosstalk, can you share some scope shots of the crosstalk?

Thanks,
Rami