Teensy 3.0

Use this Teensy 3.0 with your Teensy code to keep your projects small when you need high speed! 32 Bit ARM, with a MK20DX128VLH5 chip.

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Last Updated: 06/17/2024




Teensy 3.0 is the predecessor that is the same size and shape as the updated Teensy 3.2. We recommend Teensy 3.2 for new projects. Version 3.0 is not recommended for new designsTeensy 3.2 is a functional replacement for 3.0, with far more memory and extra features.


  • Teensy 3.0
  • 32 Bit ARM Cortex-M4, with a MK20DX128VLH5 chip.
  • 128K Flash Memory, 16K RAM, 2K EEPROM
  • 14* High Resolution Analog Inputs (13 bits usable, 16 bit hardware)
  • 34* Digital I/O Pins (10 shared with analog)
  • 10 PWM outputs
  • 8 Timers for intervals/delays, separate from PWM
  • USB with dedicated DMA memory transfers
  • 3 UARTs (serial ports)
  • SPI, I2C, I2S, IR modulator
  • I2S (for high quality audio interface)
  • Real Time Clock (with user-added 32.768 crystal and battery)
  • 4 general purpose DMA channels (separate from USB)
  • Touch Sensor Inputs
  • NOTE: Teensy 3.0 boards made after 2015 are green with gold plating, not black with tin plating as shown in the pinout diagrams above.
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