STMicroelectronics STM32G041G8U6

Overview

STM32G041G8U6 from STMicroelectronics is a 32-bit Arm® Cortex®-M0+ microcontroller in UFQFPN28 package, featuring 64 KB Flash, 8 KB SRAM, AES-128/256 hardware encryption, true random-number generator (RNG), and 12-bit ADC with 0.4 µs conversion time. It operates from 1.7–3.6 V across –40°C to 125°C and supports dual USARTs with LIN/IrDA, two I²C interfaces (one Fast-mode Plus), and two SPIs - deployed in industrial sensor nodes requiring secure firmware updates and low-power operation.

For engineers reviewing the STM32G041G8U6 datasheet, STM32G041G8U6 pinout, STM32G041G8U6 application, or STM32G041G8U6 equivalent, key selection criteria include its 64 MHz max CPU frequency, 11-timer suite (including 128 MHz-capable advanced timer), integrated RTC with periodic wakeup from Stop/Standby, and ECOPACK2-compliant UFQFPN28 footprint for space-constrained designs.

Technical Context

The STM32G041G8U6 integrates an Arm Cortex-M0+ core with Memory Protection Unit (MPU) and executes instructions at up to 64 MHz via internal 16 MHz RC oscillator with PLL or external 4–48 MHz crystal. Its clock system includes dual oscillators (HSE/LSE), programmable voltage detector (PVD), and Brownout reset (BOR) for robust power management in fluctuating supply environments.

Peripheral interconnect is managed through a dedicated AHB/APB matrix supporting concurrent DMA transfers across 5-channel controller with flexible mapping. Analog subsystem comprises 12-bit ADC with hardware oversampling up to 16-bit resolution, temperature sensor, VREFINT, and VBAT monitoring - all calibrated and characterized per DS12993 Rev 4 Tables 5, 6, and 64.

Key Specifications

Pinout & Package

STM32G041G8U6 uses the UFQFPN28 (A0B0) package: 28-pin, 4 × 4 mm, 0.5 mm pitch, exposed thermal pad. Pin functions validated per DS12993 Rev 4 Table 12 (Pin assignment and description) and Table 13–17 (alternate function mapping).

Key Features

Applications

Equivalent & Alternatives

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

Compared with STM32G031K8T6, the STM32G041G8U6 adds essential security and timing capabilities without increasing package size; versus STM32G071GBU6, it delivers identical crypto and analog performance in a smaller, lower-cost UFQFPN28 footprint - ideal for space- and cost-constrained secure embedded nodes.

Availability

STM32G041G8U6 is available at Aetrix Electronics and suitable for industrial sensor nodes, smart meter interfaces, motor control modules, and IoT edge gateways requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for STM32G041G8U6 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, specializing in microcontrollers, power management, MEMS, and automotive ICs with vertical manufacturing and broad industrial qualification.

The STM32G0 series targets cost-sensitive, secure, and ultra-low-power applications - designed specifically for industrial automation, smart meters, and consumer IoT endpoints where small footprint, cryptographic capability, and extended temperature resilience are mandatory.

FAQ

What is the maximum operating frequency of the STM32G041G8U6?

The STM32G041G8U6 achieves a maximum CPU frequency of 64 MHz using its internal 16 MHz RC oscillator with PLL or an external 4–48 MHz crystal. This frequency is fully supported across the full –40°C to +125°C operating range, with timing verified per DS12993 Rev 4 Section 5.3.22 and Table 66.

Does the STM32G041G8U6 support hardware-based secure boot?

Yes - it implements readout protection (ROP) Levels 1 and 2, a securable Flash area, and boot mode selection via BOOT0 pin. Secure boot is enforced by the embedded reset and power control block, preventing execution from unauthorized memory regions. Factory-programmed 96-bit unique ID further enables device identity binding in secure provisioning flows.

Can the STM32G041G8U6 operate from a single 3.3 V supply without external regulators?

Yes - the device operates across 1.7–3.6 V, making direct connection to standard 3.3 V LDOs fully compliant. Its internal voltage regulator supports all operating modes (Run, Sleep, Stop), and the VDD/VSS pin configuration (DS12993 Rev 4 Table 12) confirms single-supply compatibility with proper local decoupling (100 nF ceramic + 4.7 µF tantalum).

How many I²C interfaces does the STM32G041G8U6 include, and what are their key capabilities?

The STM32G041G8U6 includes two I²C interfaces: I²C1 supports Fast-mode Plus (1 Mbit/s), SMBus/PMBus, and wakeup from Stop mode; I²C2 supports Fast-mode Plus with extra current sink. Both are independently clocked, support 7- and 10-bit addressing, and feature analog/digital filters - validated per DS12993 Rev 4 Tables 8 and 68–69.