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Part Number: TS3A24159
I'm using the TS3A24159 as a switch between 2 Uart devices. I'm seeing about a 2% failure with these devices in production and cannot seem to pinpoint the problem. When both devices are connected (via external cable), only the NO device communicates with the host processor. If I only connect the NC device, it works fine and same if both or only the NO device is connected. Please see schematic below and let me know if you see anything I can check that could potentially cause this problem.
When verifying the signals with an oscilloscope, the device that is not working never sees the TX from the host indicating that the switch isn't closed or somehow between states.
1mS delay between communications and switching
End devices are 2 of the same microcontrollers.
Regards, Dan Hughes
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In reply to Adam Torma:
Sorry for the delay in getting back with you. I'm in the middle of moving offices.
The unit I had with these symptoms ended up having the 5v and 3.3v lines crossed in the cabling between the 2 PCBs. It's interesting that the boards react this way but to no fault of the TI TS3A24159 part. I have others that are also having these same symptoms so once I get resettled and unpacked, I'll get those back out to continue the investigation.
Thanks for your patience.
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