The 40-pin GPIO header is central to maker projects. The schematic shows direct connections from the SoC, supporting interfaces such as: 3. Video and Audio Output
LPDDR4 SDRAM (available in 1GB, 2GB, 4GB, and 8GB configurations) stacked via a Package-on-Package (PoP) or discrete placement depending on revision. Raspberry Pi 4 Model B Full Schematic
The power delivery architecture of the Pi 4 is significantly more complex than its predecessors, replacing simple linear regulators with a sophisticated power management integrated circuit (PMIC). USB Type-C Input Power enters the board via a USB Type-C connector. The 40-pin GPIO header is central to maker projects
At the center of the schematic sits the Broadcom BCM2711 SoC. Unlike its predecessors, this chip uses a 28nm process. It features a quad-core Cortex-A72 architecture. This shift allows for faster clock speeds and better thermal efficiency. Quad-core 64-bit ARM v8. Speed: 1.5GHz (upgradable via firmware). Video: VideoCore VI supports OpenGL ES 3.x. Power Delivery and Management (PMIC) The power delivery architecture of the Pi 4
The Ethernet jack includes integrated magnetics (MagJack) to isolate the board from voltage spikes on the Ethernet cable.
