STMicroelectronics STM32G031G6U6TR

Overview

STM32G031G6U6TR from STMicroelectronics is a 32-bit Arm® Cortex®-M0+ microcontroller in UFQFPN28 package, operating up to 64 MHz with 64 KB Flash, 8 KB SRAM, and integrated 12-bit ADC (0.4 µs conversion), dual USARTs (one with LIN/ISO7816), and two I²C interfaces supporting Fast-mode Plus (1 Mbit/s). It targets cost-sensitive industrial control and smart sensor nodes requiring low-power operation down to Shutdown mode (200 nA) and robust peripheral integration.

For engineers reviewing the STM32G031G6U6TR datasheet, STM32G031G6U6TR pinout, STM32G031G6U6TR application, or STM32G031G6U6TR equivalent, key selection criteria include its 28-pin UFQFPN footprint, 1.7–3.6 V supply range, 5 V-tolerant GPIOs, RTC with periodic wakeup from Stop/Standby, and SWD debug interface - all critical for space-constrained, battery-backed embedded designs.

Technical Context

The device implements an Arm Cortex-M0+ core with MPU, supporting TrustZone-like memory protection via readout protection (RDP) levels and securable flash area. Its clock system integrates four oscillators: 4–48 MHz HSE, 32 kHz LSE with calibration, 16 MHz HSI (±1%), and 32 kHz LSI (±5%), enabling precise timing across power modes.

Peripheral interconnect uses a hierarchical AHB/APB bus matrix with DMA controller (5 channels, flexible mapping) and NVIC with 32 external interrupts. Analog subsystem includes VREFINT, temperature sensor, VBAT monitoring, and VREFBUF - all calibrated and specified over –40°C to 125°C ambient.

Key Specifications

Pinout & Package

STM32G031G6U6TR is housed in a 28-pin Ultra-Fine Pitch Quad Flat No-lead (UFQFPN28) package, 4 mm × 4 mm, 0.5 mm pitch, with exposed thermal pad. This compact, surface-mount package supports high-density PCB layouts and efficient thermal dissipation in space-constrained applications.

Key Features

Applications

Equivalent & Alternatives

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

Compared with STM32G031F6P6, the G6U6TR offers smaller form factor and VBAT support for RTC backup; versus STM32G041F8P6, it trades USB and extra memory for lower cost and power - making it optimal for non-USB, space- and battery-constrained edge nodes.

Availability

STM32G031G6U6TR is available at Aetrix Electronics and suitable for smart metering, industrial sensor nodes, home appliance control, and IoT edge gateways requiring stable component supply, long-term manufacturability, and automotive-grade temperature support (–40°C to 125°C).

Supply support for STM32G031G6U6TR 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 products for industrial, automotive, and consumer markets.

The STM32G0 series targets cost-optimized, ultra-low-power embedded applications - delivering Cortex-M0+ performance with advanced analog integration, security features, and robust qualification for harsh environments.

FAQ

What is the maximum operating frequency and supported voltage range?

The STM32G031G6U6TR operates at up to 64 MHz and supports a supply voltage range of 1.7 V to 3.6 V. Its internal voltage regulator maintains stable core operation across this range, and the device is fully specified for all electrical characteristics within these limits - including Flash programming and ADC accuracy - at temperatures from –40°C to 125°C.

Does this MCU support hardware encryption or secure boot?

This part does not integrate dedicated cryptographic accelerators (AES, SHA, PKA) or ROM-based secure boot. It provides readout protection (RDP) levels and a securable flash area for firmware IP protection, but lacks hardware TRNG, secure key storage, or boot ROM signature verification - making it suitable for applications where basic firmware confidentiality suffices, not high-assurance security.

Can the internal 32 kHz RC oscillator replace an external crystal for RTC operation?

No - the internal 32 kHz RC oscillator (LSI) has ±5% accuracy and is unsuitable for calendar RTC applications requiring timekeeping stability. The device requires the 32.768 kHz external LSE crystal (with calibration support) for accurate RTC operation; LSI is only recommended for watchdog or low-precision timing where drift is acceptable.

How many 5 V-tolerant I/Os does the UFQFPN28 package provide?

The STM32G031G6U6TR in UFQFPN28 exposes 26 GPIOs, of which 23 are 5 V-tolerant (all PAx and PBx pins except PA13/SWDIO, PA14/SWCLK, and NRST). This enables direct interfacing with 5 V peripherals like legacy UART transceivers or optocouplers without external level-shifting circuitry.