STMicroelectronics STM32L041K4U6TR, 32-Bit Single-Core ARM Cortex-M0+, 32MHz, 16KB FLASH, 8K x 8 RAM, 1K x 8 EEPROM, 1.8V~3.6V, -40°C~85°C, 32-UFQFN Exposed Pad.
| Parameter | Value |
|---|---|
| Series | STM32L0 |
| Mounting type | Surface Mount |
| Oscillator type | Internal |
| Program memory type | FLASH |
| Voltage - supply (Vcc (Vdd)) | 1.8V ~ 3.6V |
| Operating temperature | -40°C~85°C(TA) |
| Speed | 32MHz |
| Package | Tape & Reel (TR) |
| RAM size | 8K x 8 |
| Core size | 32-Bit Single-Core |
| EEPROM size | 1K x 8 |
| Peripherals | Brown-out Detect/Reset, DMA, POR, PWM, WDT |
| Connectivity | I²C, IrDA, LINbus, SPI, UART/USART |
| Number of i (O) | 25 |
| Core processor | ARM® Cortex®-M0+ |
| Case | 32-UFQFN Exposed Pad |
| Data converters | A/D 10x12b |
| Program memory size | 16KB (16K x 8) |
The STM32L041K4U6TR: The 32-UFQFPN (5x5 mm) package with exposed pad fits tight PCB layouts while keeping the thermal path short for low-power operation.
The peripheral list includes brown-out detect, POR, PWM, a watchdog timer, and DMA — enough to offload the core in data-logging and control loops.
The base product number STM32L041 covers a range of Flash and SRAM density options in the same package footprint.
Pin-compatible alternatives exist within the STM32L0 series — parts with the same base number STM32L041 but different Flash/SRAM densities share the same 32-UFQFPN footprint and pinout. For a direct parametric match, the STM32L041K4U6TR is the 16 KB Flash variant; higher-density siblings (e.g., 32 KB or 64 KB Flash) are drop-in replacements if firmware requires more code space.