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MAX3232E: Noise in the ROUT line

Vasu
Prodigy 150 points

Part Number: MAX3232E

Hello Team, 

Observed some regular tiny noise in the ROUT 3.3V side of the Max IC. Please clarify what is the route cause of the noise and what is the work around for that. C1+ and C2+ capacitor values are 0.1 micro farad as recommended . 

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  • 0
    TI__Mastermind 20272 points

    Hi Vasu,

    Thanks for reaching out on E2E.

    Unfortunately there are quite a number of reasons this noise could be taking place. Could you provide a schematic for this device? Could you also provide either the file or images of the layout (specifically the placement of all capacitors surrounding this IC)?

    Could you also probe the VCC input to the MAX3232E along the noise that is present on the ROUT pin? 

    Just note that even though the root cause may not be easily determined, this is still a valid signal from the receivers point of view. So it should not be a concern.

    Best,

    Ethan