STMicroelectronics STM32F031K6U7TR

Overview

STM32F031K6U7TR from STMicroelectronics is a 32-bit ARM® Cortex®-M0 microcontroller with 32 KB Flash, 4 KB SRAM, 48 MHz max CPU frequency, 12-bit ADC (1.0 µs conversion), and integrated RTC-designed for compact industrial control, sensor interface, and low-power embedded systems requiring real-time responsiveness and analog integration.

For engineers reviewing the STM32F031K6U7TR datasheet, STM32F031K6U7TR pinout, STM32F031K6U7TR application, or STM32F031K6U7TR equivalent, key selection considerations include its UFQFPN32 package footprint, 5 V-tolerant I/O count (up to 26 pins), 9 timer peripherals including advanced-control TIM1 with deadtime generation, and dual clock sources (HSE up to 32 MHz + 32 kHz LSE for RTC).

Technical Context

The device implements a single-cycle ARM Cortex-M0 core with Thumb-2 instruction set, supporting deterministic interrupt latency via NVIC and hardware CRC acceleration. Memory subsystem includes Flash with error correction, SRAM with parity checking, and separate VDDA supply for analog circuitry.

Its clock architecture integrates multiple oscillators: 4–32 MHz HSE crystal input, 32 kHz LSE for RTC calibration, 8 MHz HSI with PLL for system clock scaling, and 40 kHz LSI for watchdog timing-enabling precise low-power mode transitions and wake-up timing down to 5.5 µs from Stop mode.

Key Specifications

Pinout & Package

STM32F031K6U7TR uses the UFQFPN32 (5 × 5 mm, 0.5 mm pitch) package, optimized for space-constrained PCB layouts while maintaining thermal performance and manufacturability in reflow processes.

Key Features

Applications

Equivalent & Alternatives

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

Compared with STM32F031K6U7TR, STM32F030F4P6 sacrifices advanced timer capability and I/O voltage flexibility for lower unit cost, while STM32G031F8P6 offers higher performance and security at marginally increased price-making it optimal for future-proofed medical or industrial deployments.

Availability

STM32F031K6U7TR is available at Aetrix Electronics and suitable for industrial sensor nodes, smart HVAC actuators, programmable logic relays, and medical infusion pump controllers requiring stable component supply across long-lifecycle production programs.

Supply support for STM32F031K6U7TR 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, Switzerland, delivering silicon solutions for automotive, industrial, and consumer markets since 1987.

The STM32F0 series targets cost-sensitive, resource-constrained embedded applications where reliability, low power, and analog integration are critical-particularly in industrial automation, appliance control, and IoT edge nodes.

FAQ

What is the maximum operating frequency of the STM32F031K6U7TR?

The STM32F031K6U7TR operates at a maximum CPU frequency of 48 MHz, achieved using the internal 8 MHz HSI oscillator with x6 PLL multiplication or an external 4–32 MHz crystal. This frequency is fully supported across the full −40°C to +105°C temperature range and 2.0–3.6 V supply voltage, with timing verified per ST's characterization data in DocID025743 Rev 6, Section 6.3.19.

Does the STM32F031K6U7TR support USB connectivity?

No, the STM32F031K6U7TR does not include a USB peripheral. It provides USART, SPI, and I2C interfaces only. For USB-enabled variants in the same family, engineers should consider the STM32F042x6 or STM32F072xB series, which integrate USB 2.0 FS transceivers and dedicated USB clock recovery circuitry.

How many I/O pins on the STM32F031K6U7TR are 5 V tolerant?

Up to 26 I/O pins on the STM32F031K6U7TR are 5 V tolerant when configured in input, output, or alternate function modes-specifically PA0–PA7, PA9–PA10, PA12–PA15, PB0–PB1, and PB10–PB11. This is confirmed in Section 3.7 of the datasheet (DocID025743 Rev 6) and validated in electrical characteristics Table 46.

What debug interface does the STM32F031K6U7TR use?

The STM32F031K6U7TR uses Serial Wire Debug (SWD), a 2-pin ARM-standard interface (SWCLK and SWDIO) supporting full JTAG-equivalent functionality-including breakpoints, watchpoints, and memory access-at reduced pin count. SWD is enabled by default after reset and requires no configuration to enter debug mode via compatible tools like ST-LINK/V2.