Raspberry Pi 4 Model B |link| Full Schematic Jun 2026

For most users—whether you are building a custom HAT, troubleshooting a power issue, or simply curious about how the Pi 4 is designed—the official PDF is more than sufficient. However, for those seeking deeper hardware access, the Pi 4's limitations may be a driving factor toward using the Compute Module 4 instead.

The subsequent revision (Rev 1.2) corrected this issue by properly separating the CC lines, each with its own 5.1K resistor. If you are using an original Rev 1.1 Pi 4B, the schematic provides the definitive explanation for any USB-C power problems you may encounter.

While Raspberry Pi Trading Ltd. does not release the completely unredacted, multi-page Altium or Cadence design files for commercial reasons, they do provide an official reduced "Format Schematic" that maps out all critical user-facing subsystems. This comprehensive guide serves as your deep-dive walkthrough of the Raspberry Pi 4 Model B hardware architecture, translating complex schematic diagrams into actionable engineering knowledge. 1. System Architecture Overview Raspberry Pi 4 Model B Full Schematic

The Pi 4 offers significantly faster performance, largely due to its updated RAM options.

The PMIC ensures that the board remains stable under heavy loads, which is why a 3A power supply is strictly recommended. Raspberry Pi 3. High-Speed Connectivity and I/O For most users—whether you are building a custom

At the heart of the Raspberry Pi 4 Model B schematic is the Broadcom BCM2711 system-on-chip (SoC). Moving away from the older architectures of the Pi 3, the BCM2711 introduces a highly advanced processing and I/O layout.

The schematic is marked (REDUCED) , which explicitly indicates that it is and that additional sheets containing internal SoC connections are not included. If you are using an original Rev 1

: Connected via a dedicated high-speed bus. Options include 1GB, 2GB, 4GB, or 8GB LPDDR4-3200 SDRAM. EEPROM (U5)

Centered around the BCM2711 (Quad-core Cortex-A72) and LPDDR4 memory. The technical peripheral documentation explains how these interact with the GPU and I/O.

The power delivery circuit is one of the most complex sections of the schematic. The board uses the power management IC. Buck Converters : The