STMicroelectronics STM32F031G6U7

Overview

STM32F031G6U7 from STMicroelectronics is a 32-bit ARM® Cortex®-M0 microcontroller with 32 KB Flash, 4 KB SRAM (with hardware parity), 12-bit 1.0 µs ADC (10-channel), up to 39 fast I/Os (26 with 5 V tolerance), and operating voltage range of 2.0–3.6 V. It integrates 9 timers-including one advanced-control timer with deadtime generation-and communication interfaces (I²C Fast Mode Plus, USART with IrDA/LIN/ISO7816, SPI at 18 Mbit/s)-targeting cost-sensitive industrial control and smart sensor nodes.

For engineers reviewing the STM32F031G6U7 datasheet, STM32F031G6U7 pinout, STM32F031G6U7 application, or STM32F031G6U7 equivalent, key selection criteria include its 48 MHz max CPU frequency, ECOPACK®2-compliant UFQFPN32 package, -40 to +105°C extended temperature rating, SWD debug support, and integrated RTC with alarm and periodic wakeup from Stop/Standby modes.

Technical Context

The device implements a single-cycle ARM Cortex-M0 core with Thumb-2 instruction set, supporting deterministic real-time execution and low-latency interrupt handling via NVIC. Its clock system combines internal RC oscillators (8 MHz HSI with x6 PLL, 40 kHz LSI) and external sources (4–32 MHz HSE, 32.768 kHz LSE for RTC calibration).

Power architecture includes programmable voltage detector (PVD), POR/PDR reset logic, and three low-power modes (Sleep, Stop, Standby) with VBAT backup for RTC and registers. Analog subsystem features separate VDDA supply (2.4–3.6 V), internal temperature sensor, and calibrated VREFINT for ADC reference stability.

Key Specifications

Pinout & Package

STM32F031G6U7 is housed in a 5 × 5 mm UFQFPN32 (Ultra-Fine Pitch Quad Flat No-lead) package with 0.5 mm pitch, optimized for compact PCB layouts and automated assembly. Pin count and thermal performance align with industrial-grade reliability requirements.

Key Features

Applications

Equivalent & Alternatives

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

Compared with STM32F031G6U7, the F030F4P6 sacrifices timer capability and Flash density for lower unit cost and smaller footprint, while the F042F6P6 trades off industrial temperature grade (-40 to +85°C only) and adds USB-but requires careful USB PHY layout and ESD protection.

Availability

STM32F031G6U7 is available at Aetrix Electronics and suitable for industrial motor control, smart sensor nodes, PLC digital I/O modules, and home appliance control panels requiring stable component supply across long production lifecycles.

Supply support for STM32F031G6U7 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, sensors, and analog devices for industrial, automotive, and consumer markets.

The STM32F0 series targets cost-sensitive, resource-constrained embedded applications demanding high integration, low power, and industrial-grade reliability-optimized for control-centric use cases without sacrificing peripheral richness.

FAQ

What is the maximum operating frequency of the STM32F031G6U7?

The STM32F031G6U7 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 fully supported 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 and communication stacks.

Does the STM32F031G6U7 support hardware CRC calculation?

Yes, the STM32F031G6U7 includes a dedicated cyclic redundancy check (CRC) calculation unit compliant with CRC-32 standards. It operates independently of the CPU, accepting data via memory-mapped registers or DMA, and is commonly used for firmware image integrity verification and secure bootloader validation without software overhead.

Can the STM32F031G6U7 operate from a single 3.3 V supply without external regulators?

Yes-the STM32F031G6U7 supports direct connection to a regulated 3.3 V supply across its VDD/VSS and VDDA/VSSA pins. The internal voltage regulator is bypassed in this configuration, and the analog supply must be clean and decoupled per Section 6.1.6 of the datasheet to ensure ADC accuracy and RTC stability.

How many I/O pins on the STM32F031G6U7 are 5 V tolerant?

Up to 26 I/O pins on the STM32F031G6U7 are 5 V tolerant, as specified in Table 11 (Pin Definitions) and Section 3.7 of the datasheet. These pins tolerate 5 V logic levels regardless of VDD voltage (2.0–3.6 V), enabling direct interfacing with legacy 5 V peripherals such as optocouplers, logic gates, and industrial sensors without external level-shifting circuitry.