STMicroelectronics STM32L071K8U3, ARM Cortex-M0+ 32-bit MCU, 32 MHz, 64 KB Flash, 20 KB RAM, 3 KB EEPROM, 1.65 V to 3.6 V, -40 to 125 °C, 32-UFQFPN (5x5 mm).
| Parameter | Value |
|---|---|
| Series | STM32L0 |
| Mounting | Surface Mount |
| Oscillator type | Internal |
| Program memory type | FLASH |
| Voltage - supply (Vcc (Vdd)) | 1.65V ~ 3.6V |
| Operating temperature | -40°C ~ 125°C (TA) |
| Speed | 32MHz |
| Package | Tray |
| RAM size | 20K x 8 |
| Core size | 32-Bit Single-Core |
| EEPROM size | 3K x 8 |
| Peripherals | Brown-out Detect/Reset, DMA, I²S, POR, PWM, WDT |
| Connectivity | I²C, IrDA, SPI, UART/USART |
| Number of i (O) | 23 |
| Core processor | ARM® Cortex®-M0+ |
| Case | 32-UFQFN Exposed Pad |
| Data converters | A/D 10x12b |
| Program memory size | 64KB (64K x 8) |
It integrates 3 KB of on-chip EEPROM for parameter storage, avoiding an external serial EEPROM.
On-chip peripherals include a 10-channel 12-bit ADC, brown-out detect, POR, PWM, WDT, and DMA — enough for closed-loop control and data logging without external glue logic.
ST lists the STM32L071K8U3 as Active (current production) with ROHS3 compliance.
The STM32L071K8U3 and STM32L071K8U6 share the same core, memory, and peripherals. For designs that must operate above 85°C ambient, the U3 is the correct choice.
Yes, the STM32L071K8U3 is supported in STM32CubeMX. The tool generates HAL and LL initialization code for the STM32L0 series, including pin configuration, clock tree setup, and peripheral middleware.
The STM32L151CBU6A is a functional alternative within ST's portfolio, but it uses a Cortex-M3 core with a wider peripheral set (USB, capacitive sensing, dual DAC) and a 1.8 V supply. It is not pin-compatible — the L151 comes in a 48-pin package with 37 I/O. For a drop-in replacement, stick with the STM32L0 series; the STM32L071K8U6 (85°C grade) shares the same footprint.