STMicroelectronics STM32G041G6U6

Overview

STM32G041G6U6 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, 12-bit ADC (0.4 µs conversion), and dual USARTs with LIN/IrDA support. It operates from 1.7–3.6 V across –40°C to 125°C and targets secure, low-power industrial sensor nodes and smart metering endpoints.

For engineers reviewing the STM32G041G6U6 datasheet, STM32G041G6U6 pinout, STM32G041G6U6 application, or STM32G041G6U6 equivalent, key selection criteria include its 28-pin UFQFPN footprint, integrated RNG and securable flash area, RTC with periodic wakeup from Stop mode, and dual I²C interfaces supporting Fast-mode Plus (1 Mbit/s) with SMBus/PMBus compatibility.

Technical Context

The STM32G041G6U6 integrates an Arm Cortex-M0+ core with MPU, running up to 64 MHz via internal 16 MHz RC + PLL or external 4–48 MHz crystal. Its memory subsystem includes 64 KB flash with readout protection levels and a securable area, plus 8 KB SRAM with hardware parity checking for fault-tolerant operation.

Peripheral interconnect uses a multi-layer AHB/APB bus matrix enabling concurrent DMA transfers and peripheral access. Clock tree supports three independent oscillators (HSE, LSE, HSI16) and two RC sources (LSI, HSI48), with programmable PVD/BOR and four low-power modes (Sleep, Stop, Standby, Shutdown) optimized for battery-backed applications requiring sub-μA retention current.

Key Specifications

Pinout & Package

STM32G041G6U6 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. Pin assignments follow ST's standard STM32G0 series layout for mechanical and thermal reliability in space-constrained designs.

Key Features

Applications

Equivalent & Alternatives

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

Compared with STM32G031F6P6, the STM32G041G6U6 adds essential security primitives and doubles Flash capacity without increasing footprint; versus STM32G071GBU6, it trades USB and memory headroom for lower active power and smaller die size-ideal for deeply embedded, battery-powered endpoints where security and thermal envelope are critical.

Availability

STM32G041G6U6 is available at Aetrix Electronics and suitable for smart metering, industrial sensor nodes, automotive body electronics, and secure IoT edge gateways requiring stable component supply across extended temperature ranges and long product lifecycles.

Supply support for STM32G041G6U6 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 STM32G0 series targets entry-level embedded applications demanding high integration, ultra-low power, and hardware security at minimal cost-optimized for space-constrained, battery-operated, and safety-aware devices.

FAQ

What is the maximum operating frequency of the STM32G041G6U6?

The STM32G041G6U6 achieves a maximum CPU frequency of 64 MHz using its internal 16 MHz RC oscillator with PLL multiplication or an external 4–48 MHz crystal. This frequency is fully supported across the entire –40°C to +125°C temperature range and 1.7–3.6 V supply voltage, with timing verified per DS12993 Rev 4 Section 5.3.22.

Does the STM32G041G6U6 support hardware AES encryption?

Yes, the STM32G041G6U6 integrates a dedicated AES-128 and AES-256 hardware accelerator compliant with FIPS PUB 197. It supports ECB, CBC, CTR, and GCM modes with DMA chaining, and operates independently of the CPU to reduce latency and power consumption during encryption/decryption tasks.

What low-power modes are available and what are their typical current draws?

The device offers Sleep, Stop, Standby, and Shutdown modes. In Stop 0 mode (RTC + SRAM + regulator on), typical current is 0.32 µA at 25°C; in Standby mode (RTC + backup registers only), it drops to 0.19 µA. All values are measured per DS12993 Rev 4 Table 28–30 and include VBAT operation capability.

Is the STM32G041G6U6 pin-compatible with other STM32G0 series MCUs in UFQFPN28?

No-while the STM32G041G6U6 shares the UFQFPN28 package with some G0 variants (e.g., STM32G071GBU6), pin functions differ significantly due to peripheral count and routing constraints. For example, PA13/PA14 are SWD-only on G041 but support additional alternate functions on G071; always verify pin assignment tables (DS12993 Section 4) before substitution.