Package and footprint — the 5x5 mm UFQFPN
Housed in a 32-UFQFPN with an exposed pad (5x5 mm body), this part is surface-mount only. The package is compact enough for space-constrained designs like sensor nodes or handheld tools.
STM32L071KBU3TR ARM Cortex-M0+ MCU, 32 MHz, 128 KB Flash
MPNSTM32L071KBU3TR
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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).
$2.5590Ref. price · indicative, final on quote
Independent supplier — new & surplus stockAuthenticity-screened · ESD-safe packingListing updated Jul 2026
Specifications
| 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 | 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) |
Product details
Frequently asked questions
What is the difference between STM32L071KBU3 and STM32L071KBU3TR?
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.
Does STM32L071KBU3TR have any known pin-compatible alternatives?
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.
What is the maximum operating frequency of STM32L071KBU3TR?
The core runs at 32 MHz, which is the maximum clock for this ARM Cortex-M0+ part in the STM32L0 series.