The base product number is STM32L052, and the series is STM32L0, which ST continues to support with development tools and firmware libraries. ROHS3 compliant, no special environmental restrictions beyond standard MSL handling for the LQFP package.
What the 1.65 V minimum supply means
The 1.65 V minimum operating voltage is the key differentiator in the STM32L0 family. It allows the MCU to run directly from a single alkaline cell down to near end-of-life voltage, or from a Li-ion cell through most of its discharge curve without a boost converter. Designs targeting coin-cell or two-AA battery systems should verify the Flash read speed at the lowest supply — at 1.65 V the 32 MHz clock may need wait states, but the core can still execute from SRAM at full speed.
Temperature grade and typical applications
It is not rated for 105°C or 125°C extended temperature, so avoid it for under-hood or downhole tools without thermal derating analysis. Typical application scenarios include battery-powered IoT edge nodes, portable medical monitors, smart sensors with USB connectivity, and low-power data loggers where the integrated EEPROM stores calibration or configuration data across power cycles.