Teensy 4.1 Development Board


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SKU: 751841
  1. ARM Cortex-M7 at 600MHz
  2. 1024K RAM (512K is tightly coupled)
  3. 8 Mbyte Flash (64K reserved for recovery & EEPROM emulation)
  4. USB Host Port
  5. 2 chips Plus Program Memory
  6. 55 Total I/O Pins


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Brand: Teensy
Category: Teensy Board
Tags: Arduino, Advanced Development Board, ARM, Development, teensy

The Teensy 4.1 is the newest iteration of the astoundingly popular development platform that features an ARM Cortex-M7 processor at 600MHz, with an NXP iMXRT1062 chip, four times larger flash memory than the 4.0, and two new locations to optionally add more memory. The Teensy 4.1 is the same size and shape as the Teensy 3.6 (2.4in by 0.7in) and provides greater I/O capability, including an ethernet PHY, SD card socket, and USB host port.

When running at 600 MHz, the Teensy 4.1 consumes approximately 100mA current and provides support for dynamic clock scaling. Unlike traditional microcontrollers, where changing the clock speed causes wrong baud rates and other issues, Teensy 4.1 hardware and Teensyduino’s software support for Arduino timing functions are designed to allow dynamically speed changes. Serial baud rates, audio streaming sample rates, and Arduino functions like delay() and millis(), and Teensyduino’s extensions like IntervalTimer and elapsedMillis, continue to work properly while the CPU changes speed. Teensy 4.1 also provides a power shut off feature. By connecting a pushbutton to the On/Off pin, the 3.3V power supply can be completely disabled by holding the button for five seconds and turned back on by a brief button press. If a coin cell is connected to VBAT, Teensy 4.1’s RTC also continues to keep track of date & time while the power is off. Teensy 4.1 also can also be overclocked, well beyond 600MHz!

Teensy 4.1’s Cortex-M7 processor includes a floating-point unit (FPU) that supports both 64 bit “double” and 32-bit “float”. With M4’s FPU on Teensy 3.5 & 3.6, and also Atmel SAMD51 chips, only 32-bit float is hardware accelerated. Any use of double, double functions like log(), sin(), cos() means slow software implemented math. Teensy 4.1 executes all of these with FPU hardware.

Pin diagram

Teensy 4.1 Development Board


  1. 10 / 100 Mbit DP83825 PHY (6 pins)
  2. ARM Cortex-M7 at 600MHz
  3. 1024K RAM (512K is tightly coupled)
  4.  CAN Bus (1 with CAN FD)
  5. 2 I2S Digital Audio
  6. 1 S/PDIF Digital Audio
  7. 3 SPI, all with 16 word FIFO
  8. 7 Bottom SMT Pad Signals
  9. 8 Serial ports
  10. 32 general-purpose DMA channels
  11. Cryptographic Acceleration
  12. Random Number Generator
  13. RTC for date/time
  14. Programmable FlexIO
  15. Pixel Processing Pipeline
  16. Peripheral cross triggering
  17. microSD Card Socket
  18. Power On/Off management

Related Article:

Teensy 4.1 Is the First Arduino-Compatible Board

Package includes:

1 x Teensy 4.1 Development Board


ARM Cortex-M7

Flash Memory (KB/MB):

8 MB


1 MB

Rated Speed (MHz):


No. of Analog Inputs


Digital I/O Pins





10 / 100 Mbit DP83825 PHY (6 pins)

USB Host

5 Pins with power management

SDIO (4 bit data)

Micro SD Socket

PWM Pins


Serial Ports


QSPI Memory

2 chips Plus Program Memory

Bottom SMT Pad Signals


SD Card Signals




Width (mm):


Shipping Weight 0.008 kg
Shipping Dimensions 7 × 2 × 1 cm
6 Months Warranty

This item is covered with a supplier warranty of 6 months from the time of delivery against manufacturing defects only. This is a quality product from the original manufacturer. Only manufacturing defects are covered under this warranty. Replacement will be done against manufacturing defects.

What voids the warranty:

If the product is subject to misuse, tampering, static discharge, accident, water or fire damage, use of chemicals & soldered or altered in any way.

Board Dimensions

Questions and answers of the customers

  1. 0 votes
    Q Can it support 2 mpbs buad rate on USART? answer now
    Asked by radhakrishnananand78 on December 23, 2023 7:07 am

    Yes, it can support upto 2mbps baud rate on USA... Read more

  2. 0 votes
    Q Is it genuine from pjrc or clone board ? answer now
    Asked by svalambhia on April 3, 2021 9:11 am


  3. 0 votes
    Q It comes with ethernet shield? answer now
    Asked by atharvaku039 on September 16, 2020 11:27 am
    A No, It doesn't come with an ethernet shield.
  4. 0 votes
    Q Where I can get the SDK for this, Do they have Linux based SDK answer now
    Asked by Zafar Iqbal on September 2, 2020 9:48 pm
    A It works will Arduino IDE , you just need to downl... Read more
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Country Of Origin: China