The STM32L041K6U7 is an STMicroelectronics ultra-low-power 32-bit MCU built around the ARM Cortex-M0+ core, running at 32 MHz. It packs 32 KB of Flash program memory, 8 KB of SRAM, and a useful 1 KB of on-chip EEPROM for calibration constants or configuration parameters that survive power loss. The part operates from 1.8 V to 3.6 V and is rated for the industrial temperature range of -40 to 105 °C, making it suitable for outdoor telecom enclosures, factory automation nodes, and engine-bay sensors where the ambient can climb.
On-chip EEPROM — one less external part
1 K x 8 of embedded EEPROM stores calibration offsets, node addresses, or production-lot data without an external serial memory chip. That saves board space and one I²C or SPI bus slot — handy when you only have 25 GPIOs to work with.
Lifecycle: EOL hot — plan the last buy now
This part is flagged EOL hot, meaning ST has discontinued it and the last-time-buy window is closing or already closed. If you have an active BOM line that uses this MCU, secure your lifetime buy through the independent channel now. No official successor is listed in the record, so a pin-compatible drop-in from the STM32L0 series is not guaranteed — verify footprint and firmware compatibility before substituting.