Core architecture and memory map
The STM32L051C6U6 is a 32-bit microcontroller built around the ARM Cortex-M0+ core, running at up to 32 MHz.
Supply range and power budget
Rated for a VDD supply between 1.65 V and 3.6 V, this part runs directly from a single Li-ion cell or a regulated 3.3 V rail. The low-voltage floor lets it stay alive during battery discharge without a boost converter.
Peripherals and I/O
The peripheral set also includes a brown-out detect/reset, DMA, I²S, PWM, and a watchdog timer.
Package and thermal pad
Housed in a 48-lead UFQFPN with an exposed pad (7x7 mm body), the package allows a low-profile, surface-mount assembly.
Lifecycle and sourcing posture
STMicroelectronics lists the STM32L051C6U6 as an active product.
