Raspberry Pi 4 Model B Full Schematic [portable] Jun 2026

In previous Pis, all USB traffic shared a single USB 2.0 bus with the Ethernet controller. The Pi 4 schematic exposes a single lane of directly out of the BCM2711 SoC. This lane is routed to a Via Labs VL805 USB 3.0 Host Controller. This dedicated PCIe link provides up to 4 Gbps (500 MB/s) of real-world throughput, allowing the USB 3.0 ports to run at maximum speed simultaneously. Dual-Display Output (Micro-HDMI)

As of 2026, Raspberry Pi Trading Ltd. provides reduced schematics (covering essential connections like power, HDMI, and USB) rather than the complete, granular PCB design files. Official Reduced Schematic (PDF): Download the RP-008345-DS Reduced Schematics Mechanical Drawings (PDF/Step): Download Technical Drawings (via PIP Portal) 3D Models (STEP/SLDPRT): GrabCAD Raspberry Pi 4 Model B Library ⚡ Hardware Breakdown: What’s Under the Hood?

Designed to handle desktop-class computing tasks.

For commercial products that integrate a Raspberry Pi (e.g., an industrial controller with a Pi 4B inside), you do not need a special license to use the schematic for integration purposes, provided you are not copying the Pi’s core circuitry. Raspberry Pi 4 Model B Full Schematic

https://datasheets.raspberrypi.com/rpi4/raspberry-pi-4-reduced-schematics.pdf

The updated schematic shows two discrete 5.1kΩ resistors—one dedicated to CC1 and one to CC2. This ensures universal compatibility with all smart power supplies. 3. SoC, RAM, and High-Speed Signal Lines

The Raspberry Pi 4 Model B represents a foundational shift in the capabilities of low-cost, single-board computers. To fully appreciate its desktop-class performance, hardware engineering teams, developers, and repair technicians rely heavily on its electrical schematics. Understanding how its multi-layered subsystems interact is critical for diagnosing hardware failures, engineering custom expansion boards, or integrating the platform into embedded industrial applications. The Architecture of the Official Schematic In previous Pis, all USB traffic shared a single USB 2

Raspberry Pi 4 Model B Full Schematic: A Complete Hardware Reference Guide

However, for hardware hackers, embedded engineers, and advanced Linux kernel developers, the board is more than just a product—it is a system. To truly understand its power sequencing, GPIO behavior, USB-C negotiation, or to repair a broken board, one thing is essential: .

Key GPIO interfaces documented in the schematic include: This dedicated PCIe link provides up to 4

: Because the schematic does not label all IC part numbers, use community-sourced lists (like the one in this article) to identify what each U-number corresponds to.

Beware of "reverse engineered" schematics on random forums (GitHub Gists or Chinese forums). While well-intentioned, they often contain errors:

The LPDDR4 RAM is documented with: