STMicroelectronics STM32L071KBU3TR, STM32L0 series, 32-bit ARM Cortex-M0+ MCU, 32 MHz, 128 KB Flash, 20 KB SRAM, 6 KB EEPROM, 1.65V-3.6V, -40°C to 125°C, 32-UFQFPN (5x5).
| Parameter | Value |
|---|---|
| Series | STM32L0 |
| Mounting type | 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 | Tape & Reel (TR) |
| RAM size | 20K x 8 |
| Core size | 32-Bit Single-Core |
| EEPROM size | 6K 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 | 128KB (128K x 8) |
Housed in a 32-UFQFPN with an exposed pad (5x5 mm body), this part is surface-mount only. The exposed thermal pad needs a via stitch to the ground plane on the PCB to pull heat out of the die — without it, continuous operation above 85°C ambient gets tight. The package is compact enough for space-constrained designs like sensor nodes or handheld tools.
The difference is the shipping medium: the base part number STM32L071KBU3 typically ships in trays or tubes, while the -TR suffix denotes Tape & Reel packaging for automated pick-and-place assembly. The silicon, package, and electrical specs are identical.
Within the STM32L0 family, the STM32L071Kx series shares the same pinout across Flash density options — so a STM32L071KBT6 (128 KB Flash) in a different package or temperature grade is functionally similar but verify the package and supply voltage range for your board.
The core runs at 32 MHz, which is the maximum clock for this ARM Cortex-M0+ part in the STM32L0 series.