The STM32L011K4T6D is an entry-level density option in the STM32L0 family.
Memory footprint — sizing the firmware budget
16 KB Flash and 2 KB SRAM fit lean firmware. 512 bytes EEPROM stores calibration constants.
Supply range and power rail design
The lower end (1.65 V) is where the internal regulator and Flash read path still guarantee operation at 32 MHz — useful for systems that run directly from a near-depleted battery. At the upper end, 3.6 V aligns with standard 3.3 V logic rails. The wide range also simplifies dual-supply designs where the MCU domain is 1.8 V and the peripheral domain is 3.3 V, as long as the I/O pins tolerate the mismatch (the datasheet's I/O structure handles 5 V tolerance on some pins — check the pin-specific ratings before mixing).
Industrial temperature grade — deployment scope
It is not rated for under-hood or engine-bay temperatures (125°C); for those, move to the STM32L0 automotive-grade variants. The 85°C ceiling also covers most industrial equipment operating in ventilated cabinets or near motors. At the cold end, -40°C is the standard for cold-chain logistics and outdoor telecom gear in northern climates.
Lifecycle and sourcing reality
STMicroelectronics lists the STM32L011K4T6D as Active.