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ISO7742: Could you tell me about the communication noise immunity of ISO7242 V.S. ISO7742 ?

Part Number: ISO7742

Hi, team.

My customers are considering ISO7242 as an alternative to ISO7742.

When customers tested the communication noise immunity of these two devices, it says that ISO 7742 is better.

So question.

① Do you think the result is correct?

② If the answer to "①" is "YES", what is the cause of this difference?

Best regards,

Masumi Sekiguchi