The STM32L071CBT6TR is an active-production STMicroelectronics MCU from the STM32L0 ultra-low-power series, built around a 32-bit ARM Cortex-M0+ core running at 32 MHz.
Housed in a 48-LQFP package (7x7 mm body), the 37 general-purpose I/O lines are accessible on a 0.50 mm pitch — a standard 4-layer PCB layout with via-in-pad is not required, but the narrow pitch does demand careful fan-out on the inner rows for dense designs.
Peripherals and connectivity — 13-channel 12-bit ADC, I²C, SPI, UART
The integrated 13-channel 12-bit ADC samples analog sensor inputs directly — enough for a multi-sensor data logger without an external ADC. Connectivity covers I²C, SPI, and UART/USART with IrDA support, plus I²S for digital audio interfaces.