Loading source-backed pinouts…
Microcontroller
Teensy 4.1
A very fast Arduino-compatible microcontroller board with many IO pins, Ethernet PHY support, USB host pads, and optional memory pads.
Processor
NXP i.MX RT1062 Arm Cortex-M7
Logic
3.3 V GPIO
Power
Micro-USB, VIN
Format
Breadboard-friendly Teensy module
Check before wiring
- 3.3 V IO only; not 5 V tolerant.
- Some underside pads are not breadboard-accessible.
Interfaces
GPIOI2CSPIUARTADCPWMUSBEthernet
Source-backed connector
Interactive pin map
Pin map
Connector
Teensy 4.1 IO (grouped by function)
Signals grouped by function — schematic layout, not to physical scale
Dense header — open Full view for a roomier, fully-labelled diagram.
Simplified diagram, grouped by function — not to physical scale. Pin data is source-backed; verify against the linked documentation.
Hover, tap, or focus a pad to inspect a pin. Use arrow keys to move between pins.
- Functional grouping of the Teensy 4.1 signal pins per the PJRC pinout card; pins 0-23 share the Teensy 4.0 layout.
- Teensy 4.x GPIO is 3.3 V and is NOT 5 V tolerant; analog inputs A0-A17 are on pins 14-27 and 38-41.
- The board also carries an onboard microSD slot, USB host pads, and an Ethernet header (requires the RJ45 magjack kit).
All 52 pins (table)
| # | Signal | Role | Net | Also / notes |
|---|---|---|---|---|
| Power | ||||
| 1 | Power | VIN | 3.6-5.5 V input when USB is not used. | |
| 2 | Power | 3V3 | Regulated 3.3 V output, 250 mA max. | |
| 3 | Ground | GND | ||
| 4 | Power | VBAT | Coin-cell input for the onboard RTC. | |
| Serial / digital | ||||
| 4 | UART | UART1 | RX1 / CRX2 | |
| 5 | UART | UART1 | TX1 / CTX2 | |
| 6 | UART | UART2 | RX2 | |
| 7 | UART | UART2 | TX2 | |
| 8 | UART | UART3 | RX3 | |
| 9 | UART | UART3 | TX3 | |
| 10 | UART | UART4 | RX4 | |
| 11 | UART | UART4 | TX4 | |
| 12 | UART | UART5 | RX5 | |
| 13 | UART | UART5 | TX5 | |
| 14 | UART | UART6 | RX6 | |
| 15 | UART | UART6 | TX6 | |
| 16 | UART | UART7 | RX7 | |
| 17 | UART | UART7 | TX7 | |
| 18 | UART | UART8 | RX8 | |
| 19 | UART | UART8 | TX8 | |
| I2C / SPI | ||||
| 20 | I2C | I2C0 | SDA0 | |
| 21 | I2C | I2C0 | SCL0 | |
| 22 | I2C | I2C1 | SDA1 | |
| 23 | I2C | I2C1 | SCL1 | |
| 24 | I2C | I2C2 | SDA2 | |
| 25 | I2C | I2C2 | SCL2 | |
| 26 | SPI | SPI0 | MOSI0 | |
| 27 | SPI | SPI0 | MISO0 | |
| 28 | SPI | SPI0 | SCK0 / LED | |
| 29 | SPI | SPI | CS0 | |
| Analog inputs | ||||
| 30 | ADC | |||
| 31 | ADC | |||
| 32 | ADC | |||
| 33 | ADC | |||
| 34 | ADC | |||
| 35 | ADC | |||
| 36 | ADC | |||
| 37 | ADC | |||
| 38 | ADC | |||
| 39 | ADC | |||
| 40 | ADC | |||
| 41 | ADC | |||
| 42 | ADC | |||
| 43 | ADC | |||
| 44 | ADC | |||
| 45 | ADC | |||
| 46 | ADC | |||
| 47 | ADC | |||
| CAN | ||||
| 48 | Alt | CAN1 | CRX1 | |
| 49 | Alt | CAN1 | CTX1 | |
| 50 | Alt | CAN2 | CRX2 | |
| 51 | Alt | CAN2 | CTX2 | |
Why it matters
- 600 MHz class MCU with 55 total IO signal pins.
- Strong audio, USB, and real-time embedded ecosystem.
- PJRC publishes pinout cards and schematic files.
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