The STM32L412TBY6PTR is an STMicroelectronics STM32L4 series microcontroller built around an ARM Cortex-M4 core running at 80 MHz. The 32-bit single-core architecture with the Cortex-M4 FPU handles sensor fusion, motor control loops, or audio processing efficiently. For designs that outgrow this memory footprint, the STM32L4 family offers density upgrades without changing the core peripheral set.
On the connectivity side, it brings I²C, SPI, Quad SPI, UART/USART, LINbus, IrDA, infrared, and USB — enough for sensor hubs, display interfaces, and serial bridges. The 30 GPIOs in the 36-WLCSP package constrain board routing, so plan the pin assignment early.
Package and assembly — 36-WLCSP
Moisture sensitivity is MSL 1 typically for WLCSP, but verify the specific bake requirements from the reel label.
The base product number is STM32L412, so any PCN or EOL notification from ST will reference that base.