Teensy 3.2

Use this Teensy 3.2 with your Teensy code to keep your projects small when you need more processing power than a Pro Micro.

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Last Updated: 05/20/2024




Teensy 3.2 is an upgrade to the Teensy 3.1. The main change is an improved 3.3V regulator, to allow Teensy to directly power ESP8266 Wifi, WIZ820io (W5200) Ethernet, and other power-hungry 3.3V devices.

Teensy 3.2's power output is rated at 250mA with a max voltage input at 6 volts, due to PCB thermal dissipation limits. However, the actual regulator chip is capable of up to 10V DC input, and up to 500mA output. These higher limits are intended to allow Teensy 3.2 to be more rugged when used with non-USB power sources which aren't well regulated 5 volt sources.

Teensy 3.2 is fully compatible with all shields and add-on boards designed for Teensy 3.1. It preserves the same size, pinout, and processor as Teensy 3.1.

The bootloader chip has also been changed from Mini54 to KL02 (the same as Teensy LC).


  • 32 bit ARM Cortex-M4 72 MHz CPU (M4 = DSP extensions)
  • Flash Memory: 256K Flash Memory
  • RAM: 64K
  • EEPROM: 2K
  • 21 Analog Pins (13 bits usable, 16 bit hardware)
  • 34 Digital I/O Pins
  • 12 PWM Pins
  • Supports SPI, I2C, I2S, IR modulator, CAN Bus
  • I2S high quality audio interface
  • Real Time Clock (requires 32.768 crystal and battery)
  • 16 DMA channels
  • Touch Sensor Inputs
  • 7 Timers for intervals/delays, separate from PWM
  • USB with dedicated DMA memory transfers
  • 3 UART serial ports
  • Upgraded Power Regulator
  • Bootloader Chip: KL02


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