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TSS721A: how to enhance immunity to interference performance for TSS721A

Part Number: TSS721A

Tool/software:

Dears,

    The customer want to use TSS721A for M-BUS with strong immunity to interference performance. The customer has noticed that some designs add four resistors to the input of TSS721A (see attachment). The customer wants to know if these four resistors enhance anti-interference performance? Could you please help share some designs that enhance the immunity to interference performance of TSS721A?Thanks.