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FMEA & The max limited current of pin RXD, TXD of PCA82C250

Question asked by Martin Zhang on Aug 5, 2018

Dear engineer of NXP,

I am doing failure analyse, because the can transeiver PCA82C50 can't communicate normaly.

What will happen, if the input current through TXD/RXD is larger than the max limited current , when I connect a small resistance between 5V supply and pin TXD/RXD. Will it lead to communication failure , or IC damage?(Figure1)

 

Thus,

  1. I need to know what limited current(min., max., typ.) of pin RXD , TXD, just like TJA1044 datasheet's decription(Figure2).
  2. It is beterr if there is a pin FMEA description  document about PCA82C50 .(Figure3)

But I can't find any one just like above two point from datasheet or application hints about PCA82C250.

 

Figure1 Problem Source(from datasheet PCA82C250.pdf)

PCA82C250_Application

 

Figure2 PIN TXD, RXD of TJA1044(from datasheet TJA1044.pdf)

TJA144CURRENTLIMITE

 

Figure3 TJA1044 PIN FMEA(from application hints AH1308_Application_Hints_Mantis.pdf)

TJA1044PINFMEA

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