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STMicroelectronics STM32F031K6U6 — Microcontrollers & Processors (MCU / MPU / DSP)

STM32F031K6U6 ARM Cortex-M0 MCU, 48 MHz, 32 KB Flash

MPNSTM32F031K6U6
Active

STMicroelectronics STM32F0 series, ARM Cortex-M0, 32-bit, 48 MHz, 32 KB Flash, 4K x 8 RAM, 27 I/O, 2 V to 3.6 V, -40°C to 85°C, surface mount 32-UFQFN exposed pad.

$3.3600Ref. price · indicative, final on quote
STMicroelectronics STM32F031K6U6 datasheet (PDF)
Independent supplier — new & surplus stockAuthenticity-screened · ESD-safe packingListing updated Jul 2026

Specifications

STM32F031K6U6 specifications
ParameterValue
SeriesSTM32F0
MountingSurface Mount
Oscillator typeInternal
Program memory typeFLASH
Voltage - supply (Vcc (Vdd))2V ~ 3.6V
Operating temperature-40°C~85°C(TA)
Speed48MHz
PackageTray
RAM size4K x 8
Core size32-Bit Single-Core
PeripheralsDMA, I²S, POR, PWM, WDT
ConnectivityI²C, IrDA, LINbus, SPI, UART/USART
Number of i (O)27
Core processorARM® Cortex®-M0
Case32-UFQFN Exposed Pad
Data convertersA/D 13x12b
Program memory size32KB (32K x 8)

Product details

The STM32F031K6U6: This MCU is built for cost-sensitive embedded control tasks — motor commutation, sensor polling, simple HMI, and communication bridging — where the 48 MHz Cortex-M0 core delivers enough throughput without the overhead of a larger Cortex-M3 or M4.

ST lists the STM32F031K6U6 as Active. The STM32F0 series is a mature, high-volume line, so supply through independent distribution is generally steady. If you are replacing a larger package or a higher-pin-count STM32F0 on a board, this 32-pin variant is a drop-in for the same-density siblings in the UFQFPN footprint.

Package and thermal pad — layout note

Surface-mount only, obviously.

Frequently asked questions

What are the specifications of STM32F031K6U6?

Peripherals include DMA, I²S, POR, PWM, WDT, and connectivity interfaces I²C, IrDA, LINbus, SPI, and UART/USART. It comes in a 32-UFQFN exposed-pad package (5x5 mm).

Does the STM32F031K6U6 have a direct equivalent or replacement?

Within the STM32F0 series, the pin-compatible siblings differ mainly in Flash and RAM density. The STM32F031K6U6 sits at the 32 KB Flash / 4 KB RAM tier. Higher-density options like the STM32F051K8U6 (64 KB Flash, 8 KB RAM) share the same 32-pin UFQFPN footprint and peripheral set, making them a drop-in upgrade if firmware fits the larger memory. No direct second-source from another manufacturer is officially listed.