STMicroelectronics STM32G031G4U6

Overview

STM32G031G4U6 from STMicroelectronics is an Arm® Cortex®-M0+ 32-bit microcontroller with 16 KB Flash, 8 KB SRAM, 12-bit ADC (0.4 µs conversion), two USARTs (one with LIN/IrDA/ISO7816), and operates from 1.7–3.6 V across –40°C to 85°C. It integrates a 16 MHz internal RC oscillator (±1 %), programmable BOR/PVD, and supports Sleep/Stop/Standby low-power modes - deployed in smart sensor nodes requiring compact size and battery longevity.

For engineers reviewing the STM32G031G4U6 datasheet, STM32G031G4U6 pinout, STM32G031G4U6 application, or STM32G031G4U6 equivalent, key selection criteria include Flash/SRAM capacity, ADC resolution and speed, UART/LIN interface support, operating voltage range, and UFQFPN28 package compatibility with space-constrained PCB layouts.

Technical Context

The STM32G031G4U6 implements a single-core Arm Cortex-M0+ CPU running up to 64 MHz, paired with a Memory Protection Unit (MPU) for secure code execution. Its clock system combines internal oscillators (HSI16 ±1 %, LSI ±5 %) and external crystal support (4–48 MHz HSE, 32 kHz LSE), enabling precise timing control for real-time peripherals including RTC with alarm and periodic wakeup.

Peripheral interconnect uses a dedicated AHB/APB bus matrix supporting concurrent DMA transfers across five channels. The 12-bit ADC features hardware oversampling up to 16-bit effective resolution, while timers include one advanced-control timer (TIM1), four general-purpose 16-bit timers, and two low-power 16-bit timers - all synchronized via shared trigger inputs for motor control or signal acquisition sequences.

Key Specifications

Pinout & Package

STM32G031G4U6 is housed in a 28-pin Ultra-Fine Pitch Quad Flat No-lead (UFQFPN28) package with exposed thermal pad (A0B0). Pin count and layout match ST's standardized UFQFPN28 mechanical specification, supporting reflow soldering and automated optical inspection.

Key Features

Applications

Equivalent & Alternatives

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

Compared with STM32G030F6P6, the STM32G031G4U6 offers superior security and timing features in a smaller package; versus STM32G041F8P6, it trades USB/crypto capability for lower cost and power - making it optimal for fixed-function, battery-operated edge nodes.

Availability

STM32G031G4U6 is available at Aetrix Electronics and suitable for smart sensor nodes, industrial motor interfaces, medical wearables, and asset tracking modules requiring stable component supply, long-term lifecycle assurance, and RoHS-compliant packaging.

Supply support for STM32G031G4U6 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 specializing in microcontrollers, power management, and analog/mixed-signal ICs - serving automotive, industrial, and consumer markets with scalable, certified platforms.

The STM32G0 series targets cost-sensitive, space-constrained embedded applications demanding high integration, low power, and robust security - designed specifically for IoT edge nodes and intelligent peripherals.

FAQ

Does STM32G031G4U6 support USB device functionality?

No. The STM32G031G4U6 does not integrate a USB PHY or USB controller. USB connectivity requires an external USB-to-UART bridge IC or migration to the STM32G041/G071 series, which include full-speed USB 2.0 device interfaces and associated descriptors.

What is the maximum operating frequency of the internal HSI16 oscillator?

The internal 16 MHz RC oscillator (HSI16) operates at exactly 16 MHz with factory-calibrated accuracy of ±1 % over the full temperature and voltage range. It can be used directly as system clock or fed into the PLL to achieve up to 64 MHz CPU frequency.

Can the ADC perform simultaneous sampling on multiple channels?

No. The STM32G031G4U6 features a single 12-bit ADC with sequential channel scanning. While it supports up to 16 external inputs and hardware oversampling, it lacks dual ADCs or interleaved sampling capability - simultaneous sampling requires external analog multiplexing or higher-tier STM32 families.

Is the UFQFPN28 package lead-free and RoHS compliant?

Yes. The STM32G031G4U6 in UFQFPN28 (A0B0) package is manufactured using lead-free solderable terminations and fully complies with EU RoHS Directive 2011/65/EU and REACH regulations, as confirmed in ST's official ECOPACK2 documentation.