What this MCU is and where it fits
The STMicroelectronics STM32L072VZI6 is a 32-bit ARM Cortex-M0+ microcontroller from the STM32L0 ultra-low-power series, clocked at 32 MHz. It carries 192 KB of Flash program memory, 20 KB of SRAM, and 3 KB of embedded EEPROM, making it a fit for battery-operated sensor nodes, industrial control panels, and IoT edge devices where power draw and analog integration matter. The 84 general-purpose I/O lines and a full set of peripherals — including a 16-channel 12-bit ADC and dual 12-bit DAC — let it handle mixed-signal tasks without extra silicon.
Key ratings and what they mean for the BOM
The 32 MHz Cortex-M0+ core delivers enough throughput for real-time control loops and protocol handling without burning the power budget of a faster core. The 192 KB Flash is sized for moderate firmware stacks — think sensor fusion algorithms or Modbus RTU slaves — but not for full GUI or heavy file-system workloads. The 1.65 V to 3.6 V supply range means this MCU can run directly from two alkaline cells or a single Li-ion cell down to its depletion voltage, saving a regulator. The -40°C to 85°C temperature grade qualifies it for outdoor telecom cabinets, factory-floor controllers, and engine-bay-adjacent electronics.
Package and integration note
Housed in a 100-UFBGA (7x7 mm) package, this is a fine-pitch BGA. The surface-mount footprint saves board area compared to an LQFP, but prototype rework is difficult.
Sourcing and lifecycle reality
The lifecycle data carries conflicting signals: one entry flags end-of-life hot (EOL hot), while another lists the product status as Active. This is a red flag for any BOM freeze. We recommend treating this part as at-risk for obsolescence and securing a last-time-buy window if your design depends on it. The base product number is STM32L072, and ST typically offers pin-compatible density variants in the same family — a migration path to a higher-Flash sibling may be worth evaluating before committing production volumes. We source this part to order against an RFQ through independent distribution; availability and current pricing are confirmed at quote time.