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ADM485 has allot noise on Receive Output Pin is it ok?

Question asked by navidrct@gmail.com on Jul 16, 2017

hi 

i have this circuit

and when i clear DE and RE pins output receive of adm485 make allot noise that make my MCU to RX overflow

is it normal or i should do something to fix it?

i forgot to put 100nF on VCC of it . cant it be the problem?

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