STMicroelectronics STM32F031G6U6

Overview

STM32F031G6U6 from STMicroelectronics is an ARM® Cortex®-M0 32-bit microcontroller with 32 KB Flash, 4 KB SRAM (with hardware parity), and operating voltage range of 2.0–3.6 V. 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 (Fast Mode Plus), USART (LIN/IrDA/ISO7816), and SPI (18 Mbit/s). It is used in cost-sensitive industrial control and smart sensor nodes requiring low-power operation and integrated analog peripherals.

For engineers reviewing the STM32F031G6U6 datasheet, STM32F031G6U6 pinout, STM32F031G6U6 application, or STM32F031G6U6 equivalent, key selection criteria include its 48 MHz CPU frequency, 5 V-tolerant I/O capability on up to 26 pins, RTC with alarm and periodic wakeup, SWD debug interface, and extended temperature range (–40 to +105°C) for harsh environments.

Technical Context

The STM32F031G6U6 implements a single-cycle ARM Cortex-M0 core with Thumb-2 instruction set, supporting deterministic real-time execution at up to 48 MHz. Its clock system combines internal RC oscillators (8 MHz HSI with PLL, 40 kHz LSI), external crystal options (4–32 MHz HSE, 32.768 kHz LSE), and precise calibration for RTC accuracy.

Power management includes programmable voltage detector (PVD), POR/PDR, and three low-power modes (Sleep, Stop, Standby) with fast wakeup (<5 µs from Sleep). The analog subsystem features separate VDDA supply (2.4–3.6 V), internal temperature sensor, and VREFINT reference-enabling self-calibrated measurements without external components.

Key Specifications

Pinout & Package

STM32F031G6U6 is housed in a 28-pin UFQFPN package (4 × 4 mm, 0.5 mm pitch), optimized for space-constrained PCB layouts while maintaining thermal performance via exposed pad. Pin count and layout align with ST's STM32F031x6 family footprint compatibility across TSSOP20 and UFQFPN28 variants.

Key Features

Applications

Equivalent & Alternatives

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

Compared with STM32F031G6U6, STM32F030F4P6 reduces BOM cost but sacrifices data integrity (no SRAM parity) and timekeeping (no RTC calendar), while STM32F042F4P6 adds USB at identical Flash/performance - making it preferable for user-facing devices needing plug-and-play configuration.

Availability

STM32F031G6U6 is available at Aetrix Electronics and suitable for industrial motor control, smart energy metering, automotive body electronics, and IoT edge sensor nodes requiring stable component supply across long production lifecycles.

Supply support for STM32F031G6U6 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 ICs, sensors, and analog components 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 - with the F031 subgroup optimized for compact packages and analog-rich control tasks.

FAQ

What is the maximum operating frequency of the STM32F031G6U6?

The STM32F031G6U6 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 entire –40 to +105°C temperature range and 2.0–3.6 V supply voltage, with timing verified per ST's production characterization data.

Does the STM32F031G6U6 support hardware-based cryptographic functions?

No, the STM32F031G6U6 does not include dedicated cryptographic accelerators (e.g., AES, SHA, PKA). It relies on software libraries for encryption, though its 96-bit unique ID and hardware CRC unit can support basic firmware authentication and integrity verification workflows in resource-limited designs.

Can the STM32F031G6U6 drive standard 5 V logic inputs directly?

Yes - up to 26 GPIO pins are 5 V tolerant when configured as inputs, meaning they safely accept 0–5.5 V signals even with VDD = 2.0–3.6 V. This eliminates external level-shifting components when interfacing with legacy 5 V sensors, switches, or industrial I/O modules.

What debug interface does the STM32F031G6U6 use, and what pins are required?

The STM32F031G6U6 uses Serial Wire Debug (SWD), requiring only two pins: SWDIO (PA13) and SWCLK (PA14). No JTAG header or additional pins are needed. SWD supports full flash programming, real-time debugging, and memory inspection - compatible with ST-LINK/V2 and other CMSIS-DAP compliant debuggers.