STMicroelectronics STM32F031G4U6

Overview

STM32F031G4U6 from STMicroelectronics is an ARM® Cortex®-M0 32-bit microcontroller with 16 KB Flash, 4 KB SRAM (with hardware parity), and operates at up to 48 MHz. It integrates a 12-bit 1.0 µs ADC (10-channel), nine timers-including one advanced-control timer with deadtime generation-and communication interfaces (I²C, USART, SPI) for embedded control in space-constrained industrial sensors and motor drives.

For engineers reviewing the STM32F031G4U6 datasheet, STM32F031G4U6 pinout, STM32F031G4U6 application, or STM32F031G4U6 equivalent, key selection criteria include its UFQFPN28 package footprint, 5 V-tolerant I/O capability on up to 26 pins, RTC with alarm and wakeup from Stop/Standby, and support for Fast Mode Plus I²C (1 Mbit/s) with 20 mA sink current.

Technical Context

The device implements a single-cycle ARM Cortex-M0 core with Thumb-2 instruction set, coupled with tightly integrated peripherals including a CRC calculation unit and programmable voltage detector (PVD) for system-level power monitoring. Its clock tree supports multiple sources: 4–32 MHz HSE crystal, 32 kHz LSE for RTC, and internal RC oscillators (8 MHz HSI with PLL, 40 kHz LSI).

Power architecture separates digital (VDD: 2.0–3.6 V) and analog (VDDA: 2.4–3.6 V) domains, enabling precise ADC operation while supporting Sleep, Stop, and Standby low-power modes with RTC and backup register retention powered by VBAT. All 28 pins of the UFQFPN28 package are assigned to GPIO, peripheral functions, or power/ground-no dedicated test or debug-only pins.

Key Specifications

Pinout & Package

STM32F031G4U6 uses the UFQFPN28 (4 × 4 mm, 0.5 mm pitch) package, optimized for high-density PCB layouts in space-constrained applications such as smart actuators and portable diagnostics tools.

Key Features

Applications

Equivalent & Alternatives

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

Compared with STM32F031G4U6, the F030F4P6 sacrifices critical timing and safety features for lower cost, while the F031K4T6 trades compactness for pin scalability-making the G4U6 optimal for size-constrained, time-aware embedded control where both integration and thermal resilience matter.

Availability

STM32F031G4U6 is available at Aetrix Electronics and suitable for industrial sensor nodes, smart actuator control, energy meter interfaces, and access control terminals requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for STM32F031G4U6 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, designing and manufacturing microcontrollers, power management ICs, MEMS, and automotive-grade components since 1987.

The STM32F0 series targets cost-sensitive, resource-constrained embedded applications-emphasizing ultra-low-power operation, robust peripheral integration, and rapid time-to-market for industrial automation and consumer IoT endpoints.

FAQ

What is the maximum operating frequency of the STM32F031G4U6?

The STM32F031G4U6 achieves a maximum CPU clock frequency of 48 MHz using its internal 8 MHz HSI oscillator with x6 PLL multiplication or an external 4–32 MHz crystal. This frequency is guaranteed across the full −40°C to +105°C operating range and supports deterministic real-time task scheduling in control loops with sub-100 ns instruction timing.

Does the STM32F031G4U6 support USB or Ethernet connectivity?

No, the STM32F031G4U6 does not integrate USB or Ethernet PHY/MAC peripherals. Its communication interfaces are limited to I²C, USART (with LIN/IrDA/ISO7816 modes), and SPI. For USB connectivity, designers must use external transceivers or select higher-series STM32 variants (e.g., F072 or G0 series) with built-in USB 2.0 FS controllers.

How many ADC channels are available, and what is their resolution?

The STM32F031G4U6 features a single 12-bit successive-approximation ADC with up to 10 input channels (including internal temperature sensor and VREFINT). Conversion time is 1.0 µs at maximum clock speed, and the ADC supports scan mode, continuous conversion, and injected channel sequencing-all configurable via registers without CPU intervention.

Is the UFQFPN28 package RoHS-compliant and lead-free?

Yes, the STM32F031G4U6 in UFQFPN28 packaging complies with RoHS Directive 2011/65/EU and is fully lead-free. It carries STMicroelectronics' ECOPACK®2 environmental certification, confirming halogen-free materials, reduced hazardous substance content, and compatibility with standard Pb-free reflow soldering profiles (peak temperature ≤260°C).