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ISOW1412: Isow1412 RO line Noise

C Hari
Prodigy 40 points
Part Number: ISOW1412

Tool/software:

Hi,

I'm using Isow1412 isolated rs485 chip in my product.I'm facing an issue currently.I'm trying to communicate with plc(Master) & my product (slave). PLC sending data which is collected & send to microcontroller through    Isow1412's RO line. Both Isow1412 & microcontroller are in 3.3V logic.In that communication which is in 3.3V i'm getting a 700mV to 900mV noise frequently. On connecting plc & my product microcontroller is getting slower which is exposed on other functionalities.

  1. I attached the image of RO pin(amplitude & timing of the glitch).

Suggest a solution to control the noise( glitches) in RO line.