MAX3232: communication fail

Allan Fan

Expert 6500 points

Part Number: MAX3232

Hi expert,

Customer used MAX3232 and found there is high chance to see communication fail.

The schematic looks good to me. Would you please review and advise what might goes wrong or what else to check?

Channels:

UART_RX
UART_TX
RS232_RX_RJ45
RS232_TX_RJ45

Thanks,

Allan

11 months ago

0 Clemens Ladisch 11 months ago

Guru 280270 points

A logic input (i.e., T2IN) should never float.

So far, I see nothing wrong. What is the actual problem? Do the input and output signals not match? Please zoom in on the waveforms so that it is possible to assess the signal edges.

0 Parker Dodson 10 months ago

TI__Mastermind 46697 points

Hi Allan,

What's the failure? The graph you sent doesn't look to have any issues.

Best,

Parker Dodson

0 Allan Fan 10 months ago in reply to Parker Dodson

TI__Expert 6500 points

Hi Parker,

Sorry that customer need some time to capture to the failure waveform in the manufactory. The original waveform is a good reference. I will keep it posted if any updates.

Thanks,

Allan

0 Parker Dodson 10 months ago in reply to Allan Fan

TI__Mastermind 46697 points

Hi Allan,

Thanks for the update - when you are able to get the bad device behavior please just let me know and I can take a look at it then!

Best,

Parker Dodson

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MAX3232: communication fail