Raspberry Pi 4 Model B Full Schematic ~upd~ Jun 2026

The available schematic documentation focuses primarily on peripheral subsystems, connectivity ports, and specific power routing sections. 1. Power Delivery and PMIC Architecture

Because of these omissions, a hardware designer who wants to build a cannot do so using only the official document. That is by design: the schematic provides enough information to use the Pi as a component in a larger system, but not to replicate the Pi itself.

This comprehensive guide dissects the intricate layers of the Raspberry Pi 4 Model B schematic, exploring the core components, power delivery networks, and high-speed interfaces that drive this powerful board. 1. Overview of the Raspberry Pi 4 Architecture

Early revisions of the Raspberry Pi 4 schematic revealed a famous design quirk: both Configuration Channel (CC1 and CC2) pins on the USB-C port shared a single 5.1kΩ pull-down resistor. This caused smart chargers (like E-marked MacBook cables) to detect the Pi as an audio accessory and withhold power. Revision 1.2 of the schematic corrected this by giving each CC pin its own independent 5.1kΩ resistor, ensuring universal USB-PD compatibility. 3. LPDDR4 Memory Architecture Raspberry Pi 4 Model B Full Schematic

Unlike earlier Pi models that used a USB‑to‑Ethernet adapter internally, the Pi 4B integrates a which contains a Gigabit Ethernet PHY and a USB 2.0 hub. This chip is connected to the BCM2711 via the second PCIe lane or via a high‑speed USB interface, depending on the exact design revision.

Broadcom BCM2711, Quad-core Cortex-A72 (ARM v8) 64-bit SoC @ 1.8GHz 1GB, 2GB, 4GB, or 8GB LPDDR4-3200 SDRAM Wireless 2.4 GHz and 5.0 GHz IEEE 802.11ac, Bluetooth 5.0 Ethernet True Gigabit Ethernet USB 2 × USB 3.0 ports; 2 × USB 2.0 ports Power 5V/3A via USB-C or GPIO Source: Raspberry Pi Foundation

The PDF is vector-based, which is great for zooming, but poor for deep analysis. Follow these workflow tips: That is by design: the schematic provides enough

There is a common misconception that the Raspberry Pi foundation provides a standard PDF schematic for the Pi 4B. Historically, for models like the Pi 3B+, the foundation released full schematics in PDF format. However, with the launch of the Pi 4, the documentation strategy shifted.

Raspberry Pi 4 Model B Go to product viewer dialog for this item.

For a complete visual inspection of the circuit paths, you can download the following official and community-sourced documents: Overview of the Raspberry Pi 4 Architecture Early

The Wi-Fi subsystem communicates with the SoC via an interface. The Bluetooth subsystem uses a high-speed UART interface.

The schematic enumerates all physical interfaces:

Powering a high-performance SBC requires a robust power delivery network (PDN). The Raspberry Pi 4 schematic introduces a sophisticated Power Management Integrated Circuit (PMIC) to handle complex voltage rails. The MaxLinear MxL7704 PMIC

Understanding the requires a deep dive into its hardware architecture. While a complete, 100% unrestricted schematic is rarely released for proprietary reasons, the official Reduced Schematics provided by Raspberry Pi Ltd. offer a comprehensive view of the board's core systems. Core Architecture and the BCM2711 SoC