# Raspberry Pi 4 Model B: specs and pinout

> Single-board computer with a 1.5GHz quad-core BCM2711 processor, 4GB LPDDR4 RAM, dual micro-HDMI and a 40-pin GPIO header.

[HTML version](https://soldr.ai/docs/boards/raspberry-pi-4-model-b)

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Single-board computer with a 1.5GHz quad-core BCM2711 processor, 4GB LPDDR4 RAM, dual micro-HDMI and a 40-pin GPIO header.

Every value cites its sourceOfficial pinout

[Buy on Compoden](https://compoden.com/products/raspberry-pi-4-model-b-4gb-ram-compoden)

## Specs

| Spec | Value | Source |
|---|---|---|
| Processor | Broadcom BCM2711, Quad-core Cortex-A72 (ARM v8) 64-bit @ 1.5GHz | Compoden listing |
| RAM | 4GB LPDDR4-3200 SDRAM | Compoden listing |
| Wireless | Dual-band Wi-Fi 5 (802.11ac), Bluetooth 5.0 | Compoden listing |
| Ethernet | Gigabit Ethernet | Compoden listing |
| GPIO | 40-pin GPIO header (fully backward compatible) | source |
| Video | 2x micro-HDMI ports (up to 4Kp60 supported) | Compoden listing |
| Power input | 5V DC via USB-C connector (minimum 3A) | Compoden listing |

## Power

| | Value | Source |
|---|---|---|
| Supply | 5V DC via USB-C, minimum 3A | Compoden listing |

## Pinout

| Pin | Function | Voltage | Notes | Source |
|---|---|---|---|---|
| pin 1: 3V3 | 3V3 | 3.3 V DC | | source |
| pin 2: 5V | 5V | 5.0 V DC | | source |
| pin 3: GP2 | Serial Data Line (SDA); transmits data to and from an I2C device; this pin has a 1.8 kΩ on-board pull-up resistor to 3.3 V | 3.3 V logic | | source |
| pin 4: 5V | 5V | 5.0 V DC | | source |
| pin 5: GP3 | Serial Clock Line (SCL); provides a clock signal that synchronises communication between your Raspberry Pi and an I2C device; this pin has a 1.8 kΩ on-board pull-up resistor to 3.3 V | 3.3 V logic | | source |
| pin 6: GND | Ground | | | source |
| pin 7: GP4 | GP4 | 3.3 V logic | | source |
| pin 8: GP14 | GP14 | 3.3 V logic | | source |
| pin 9: GND | Ground | | | source |
| pin 10: GP15 | GP15 | 3.3 V logic | | source |
| pin 11: GP17 | GP17 | 3.3 V logic | | source |
| pin 12: GP18 | GP18 | 3.3 V logic | | source |
| pin 13: GP27 | GP27 | 3.3 V logic | | source |
| pin 14: GND | Ground | | | source |
| pin 15: GP22 | GP22 | 3.3 V logic | | source |
| pin 16: GP23 | GP23 | 3.3 V logic | | source |
| pin 17: 3V3 | 3V3 | 3.3 V DC | | source |
| pin 18: GP24 | GP24 | 3.3 V logic | | source |
| pin 19: GP10 | GP10 | 3.3 V logic | | source |
| pin 20: GND | Ground | | | source |
| pin 21: GP9 | GP9 | 3.3 V logic | | source |
| pin 22: GP25 | GP25 | 3.3 V logic | | source |
| pin 23: GP11 | GP11 | 3.3 V logic | | source |
| pin 24: GP8 | GP8 | 3.3 V logic | | source |
| pin 25: GND | Ground | | | source |
| pin 26: GP7 | GP7 | 3.3 V logic | | source |
| pin 27: GP0 | GP0 | 3.3 V logic | | source |
| pin 28: GP1 | GP1 | 3.3 V logic | | source |
| pin 29: GP5 | GP5 | 3.3 V logic | | source |
| pin 30: GND | Ground | | | source |
| pin 31: GP6 | GP6 | 3.3 V logic | | source |
| pin 32: GP12 | GP12 | 3.3 V logic | | source |
| pin 33: GP13 | GP13 | 3.3 V logic | | source |
| pin 34: GND | Ground | | | source |
| pin 35: GP19 | GP19 | 3.3 V logic | | source |
| pin 36: GP16 | GP16 | 3.3 V logic | | source |
| pin 37: GP26 | GP26 | 3.3 V logic | | source |
| pin 38: GP20 | GP20 | 3.3 V logic | | source |
| pin 39: GND | Ground | | | source |
| pin 40: GP21 | GP21 | 3.3 V logic | | source |

## Common mistakes

- Feeding 5V into GPIO pins: GPIO pins operate at 3.3 V and are not 5 V tolerant ([source](https://www.raspberrypi.com/documentation/computers/raspberry-pi.html))
- Back-powering the board through GPIO: avoid back-powering via GPIO to prevent damage ([source](https://compoden.com/products/raspberry-pi-4-model-b-4gb-ram-compoden))
- Using an underpowered supply: use a stable 5V 3A USB-C supply ([source](https://compoden.com/products/raspberry-pi-4-model-b-4gb-ram-compoden))

## What we could not confirm

- 40-pin header: pin names are the GPn names as printed on the official page; the alternate-function table is not covered (only GP2 and GP3 functions are given).
- Specs come from the store listing; the official product specification page for this model is not covered.
- Typical current draw: not stated in an official source.
- Max current per GPIO pin: not stated in the official source.

## Sources

- [link](https://www.raspberrypi.com/documentation/computers/raspberry-pi.html)
- [link](https://compoden.com/products/raspberry-pi-4-model-b-4gb-ram-compoden)

Building with the Raspberry Pi 4 Model B? [Describe your project on Soldr](https://app.soldr.ai): it assigns pins from the board's published pinout, checks power and logic levels, and shows how to wire every part.