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ISO7742: About DW package

Part Number: ISO7742

Hi support team.

My customer has two questions below.

1. Is the ISO7742DWR package dimension and land pattern diagram correct with the understanding of DW0016A on pages 42 and 43 of the data sheet?

2. Is it correct to understand that DW0016B applies only to ISO7741BDW?

Best regards,

Higa

  • Hi Higa-san:

    Thanks for posting your customer question on E2E.

    All devices in ISO774x family (all non-B suffix and ISO7741B) devices are available in the same DW package (i.e. same package outline, hence, the same example board layout and stencil designs can be used). DW0016B drawings are the same as DW0016A drawings except for the addition of extra board layout and stencil design examples for HV isolation option with 8.1mm clearance/creepage.

    Highlighted below is the additional board layout example from datasheet page 46.

    Highlighted below is the additional stencil example from the datasheet page 47.

    In short, to answer your customer's questions

    1. ISO7742DWR package and landing pattern diagrams are correct. You can either use DW0016A or DW0016B. DW0016B shows additional examples for 8.1mm clearance/creepage.
    2. DW0016B applies to all devices in DW package.

    Regards,

    Dushmantha

  • Hi Dushmantha-san

    Thank you for your prompt rely.

    I understand.

    Regards,

    higa