--- title: USB 3.1 to Gigabit Ethernet Adapter Hardware Design -... description: A detailed walkthrough of designing a USB 3.1 SuperSpeed to Gigabit Ethernet adapter PCB using the Microchip LAN7800 transceiver. Covers schematic design... canonical: https://daily.dev/posts/usb-3-1-to-gigabit-ethernet-adapter-hardware-design---phil-s-lab-174-98irj0ypg twitter:card: summary_large_image twitter:site: @dailydotdev og:type: website og:site_name: daily.dev og:title: USB 3.1 to Gigabit Ethernet Adapter Hardware Design - Phil's Lab #174 | daily.dev og:description: A detailed walkthrough of designing a USB 3.1 SuperSpeed to Gigabit Ethernet adapter PCB using the Microchip LAN7800 transceiver. Covers schematic design... og:url: https://daily.dev/posts/usb-3-1-to-gigabit-ethernet-adapter-hardware-design---phil-s-lab-174-98irj0ypg og:image: https://api.daily.dev/og/posts/98IrJ0YPG.png og:image:alt: USB 3.1 to Gigabit Ethernet Adapter Hardware Design - Phil's Lab #174 og:image:width: 1200 og:image:height: 630 og:locale: en --- > ## Documentation Index > Fetch the complete documentation index at: https://daily.dev/llms.txt > Use this file to discover all available pages before exploring further. # USB 3.1 to Gigabit Ethernet Adapter Hardware Design - Phil's Lab #174 **[Phil's Lab](https://daily.dev/sources/phils-lab)** · 40 min read · 0 upvotes · 0 comments ## Summary A detailed walkthrough of designing a USB 3.1 SuperSpeed to Gigabit Ethernet adapter PCB using the Microchip LAN7800 transceiver. Covers schematic design including power supply (5V to 3.3V buck converter), USB 2.0 and SuperSpeed differential pairs with ESD protection, Gigabit Ethernet MDI connections via an integrated mag jack, and decoupling/bypass capacitor strategy. PCB layout topics include a 4-layer stackup, controlled impedance (90Ω differential for USB, 100Ω for Ethernet MDI), intra-pair length matching, QFN fanout challenges, and stub trade-offs from through-hole connectors. Also demonstrates driver installation, OTP memory configuration via MPLAB Connect Configurator (MAC address, LED behavior, USB VID/PID), and bandwidth testing with iperf3 achieving ~960 Mbps. ## Full article daily.dev links to this article rather than hosting it. Read it at the original source: ## Similar posts on daily.dev - [Antmicro releases open-source hardware Thunderbolt to dual 10GbE adapter](https://daily.dev/posts/antmicro-releases-open-source-hardware-thunderbolt-to-dual-10gbe-adapter-tmnuqqixf) · CNX Software · 0 upvotes · 0 comments - [Framework's 10G Ethernet module exposes USB-C's complexity](https://daily.dev/posts/framework-s-10g-ethernet-module-exposes-usb-c-s-complexity-ip92umde8) · Jeff Geerling · 2 upvotes · 1 comments - [Reliable 25 Gigabit Ethernet via Thunderbolt](https://daily.dev/posts/reliable-25-gigabit-ethernet-via-thunderbolt-n75o5qzli) · Hacker News · 0 upvotes · 0 comments - [10Gb/s Ethernet: what I actually did to get it working in my home](https://daily.dev/posts/10gb-s-ethernet-what-i-actually-did-to-get-it-working-in-my-home-rshzrtjaw) · Hacker News · 0 upvotes · 0 comments --- Tags: [#hardware](https://daily.dev/tags/hardware), [#embedded](https://daily.dev/tags/embedded) [View this post on daily.dev](https://daily.dev/posts/usb-3-1-to-gigabit-ethernet-adapter-hardware-design---phil-s-lab-174-98irj0ypg) ```json {"@context":"https://schema.org","@graph":[{"@type":"Organization","@id":"https://daily.dev/#organization","name":"daily.dev","url":"https://daily.dev","logo":{"@type":"ImageObject","url":"https://daily.dev/apple-touch-icon.png","width":180,"height":180},"sameAs":["https://twitter.com/dailydotdev","https://github.com/dailydotdev","https://www.linkedin.com/company/daily-dev-ltd"]},{"@type":"WebSite","@id":"https://daily.dev/#website","url":"https://daily.dev","name":"daily.dev","publisher":{"@id":"https://daily.dev/#organization"},"potentialAction":{"@type":"SearchAction","target":{"@type":"EntryPoint","urlTemplate":"https://daily.dev/search?q={search_term_string}"},"query-input":"required name=search_term_string"}}]} {"@context":"https://schema.org","@type":"TechArticle","headline":"USB 3.1 to Gigabit Ethernet Adapter Hardware Design - Phil's Lab #174","url":"https://daily.dev/posts/usb-3-1-to-gigabit-ethernet-adapter-hardware-design---phil-s-lab-174-98irj0ypg","mainEntityOfPage":{"@type":"WebPage","@id":"https://daily.dev/posts/usb-3-1-to-gigabit-ethernet-adapter-hardware-design---phil-s-lab-174-98irj0ypg"},"datePublished":"2026-06-08T15:23:52.967Z","dateModified":"2026-06-08T15:24:14.043Z","description":"A detailed walkthrough of designing a USB 3.1 SuperSpeed to Gigabit Ethernet adapter PCB using the Microchip LAN7800 transceiver. 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