STMicroelectronics STM32F031K6T7

Overview

STM32F031K6T7 from STMicroelectronics is a 32-bit ARM Cortex-M0 microcontroller in TSSOP20 package, operating up to 48 MHz with 32 KB Flash, 4 KB SRAM (HW parity), and integrated peripherals including 1×12-bit ADC (1.0 µs), 9 timers (including advanced-control TIM1 with deadtime and emergency stop), RTC, I²C (Fast Mode Plus), USART (LIN/IrDA/ISO7816), and SPI (18 Mbit/s). It targets cost-sensitive industrial control and smart sensor nodes requiring extended temperature operation (–40 to +105°C).

For engineers reviewing the STM32F031K6T7 datasheet, STM32F031K6T7 pinout, STM32F031K6T7 application, or STM32F031K6T7 equivalent, key selection criteria include its 20-pin TSSOP footprint, 5 V-tolerant I/Os (up to 16 pins), low-power Stop/Standby modes with RTC wakeup, and integrated PVD for supply monitoring in battery-backed systems.

Technical Context

The device implements a single-cycle ARM Cortex-M0 core with Thumb-2 instruction set, supported by an 8 MHz internal RC oscillator (with x6 PLL) and optional 4–32 MHz external crystal. Its clock tree includes dedicated 32 kHz LSE for RTC calibration and independent 40 kHz LSI for watchdog timing.

Peripheral integration follows a tightly coupled memory-mapped architecture: GPIOs support remappable alternate functions via AFR registers; TIM1 provides 6-channel PWM with programmable deadtime and emergency input; the 12-bit ADC supports up to 10 channels with separate 2.4–3.6 V analog supply (VDDA) and built-in temperature sensor/VREFINT.

Key Specifications

Pinout & Package

TSSOP20 (6.5 × 4.4 mm, 0.65 mm pitch) - compact surface-mount package suitable for space-constrained PCB layouts with hand-soldering capability.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar microcontroller applications.

Compared with STM32F031K6T7, STM32F030F4P6 reduces feature set and memory to lower BOM cost, while STM32G031F8P6 upgrades core, memory, and analog subsystems - both retain TSSOP20 compatibility but differ in real-time control capability and signal chain fidelity.

Availability

STM32F031K6T7 is available at Aetrix Electronics and suitable for industrial motor control, smart sensor nodes, PLC I/O modules, and power supply supervision requiring stable component supply across extended temperature ranges.

Supply support for STM32F031K6T7 includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

STMicroelectronics is a global semiconductor leader headquartered in Geneva, specializing in microcontrollers, power management, and sensing technologies for industrial, automotive, and consumer markets.

The STM32F0 series targets cost-optimized, low-power embedded applications with Cortex-M0 cores, emphasizing peripheral integration, extended temperature reliability, and toolchain compatibility across the STM32 ecosystem.

FAQ

What is the maximum operating frequency of the STM32F031K6T7?

The STM32F031K6T7 operates at a maximum CPU frequency of 48 MHz, achieved using the internal 8 MHz RC oscillator with x6 PLL multiplication or an external 4–32 MHz crystal. This frequency is guaranteed across the full –40 to +105°C temperature range and 2.0–3.6 V supply voltage, enabling deterministic real-time execution for control loops.

Does the STM32F031K6T7 support hardware debugging?

Yes, it features Serial Wire Debug (SWD) with dedicated SWDIO and SWCLK pins, supporting full JTAG-style debugging, flash programming, and real-time variable inspection via standard tools like ST-Link v2/v3. No external debug probe components are required, and SWD operates at frequencies up to 10 MHz for rapid firmware iteration.

How many I/O pins are 5 V tolerant on the TSSOP20 package?

16 of the 18 general-purpose I/O pins (PA0–PA9, PA13–PA15, PB0–PB1, PB6–PB7) are 5 V tolerant on the STM32F031K6T7 in TSSOP20. This is confirmed in Section 6.3.14 of the datasheet and allows direct interfacing with 5 V logic without external level-shifting circuitry, reducing BOM count and board area.

Can the STM32F031K6T7 operate from a single 3.3 V supply?

Yes - the device supports a single 3.3 V supply applied to both VDD and VDDA pins. The analog supply range (VDDA = VDD to 3.6 V) permits this configuration, and the 12-bit ADC maintains full 1 LSB accuracy with VDDA ≥ 2.4 V. Decoupling capacitors (100 nF ceramic per supply pin) are mandatory to meet noise specifications.