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RLee42's avatar
RLee42
Icon for Occasional Contributor rankOccasional Contributor
6 years ago
Solved

E144-Pin package exposed ground pad issue

I use MAX10 10M08SAE144 for my design. When I design the footprint for this chip, I read this from pin information document: " The E144-pin package has an exposed ground pad at the bottom of the pack...
  • ak6dn's avatar
    ak6dn
    6 years ago

    Absolutely you want to connect the ground pad directly to the ground plane. Don't use long traces to wire it to the other ground pins. They should connect direct to the ground plane as well with a local via per pin. Ditto for VCC pins that connect to a VCC plane (if present).

    As to whether you can have VIAs directly within the EPAD it depends on the capability of your PCB vendor and assembly house. Some allow VIA-in-PAD, others may not want you to do that, and instead have the VIAs just outside the EPAD connected by short traces.

ak6dn's avatar
ak6dn
Icon for Regular Contributor rankRegular Contributor
6 years ago

Absolutely you want to connect the ground pad directly to the ground plane. Don't use long traces to wire it to the other ground pins. They should connect direct to the ground plane as well with a local via per pin. Ditto for VCC pins that connect to a VCC plane (if present).

As to whether you can have VIAs directly within the EPAD it depends on the capability of your PCB vendor and assembly house. Some allow VIA-in-PAD, others may not want you to do that, and instead have the VIAs just outside the EPAD connected by short traces.