STMicroelectronics STM32G041K6U3TR

Overview

STM32G041K6U3TR from STMicroelectronics is a 32-bit Arm® Cortex®-M0+ microcontroller with 32 KB Flash, 8 KB SRAM, operating at up to 64 MHz, featuring AES-128/256 encryption, true RNG, and 12-bit ADC (0.4 µs conversion). It supports dual USARTs (one with ISO7816/LIN/IrDA), two I²C interfaces (Fast-mode Plus), two SPIs (32 Mbit/s), and RTC with alarm/wakeup-used in secure industrial sensor nodes and low-power metering endpoints.

For engineers reviewing the STM32G041K6U3TR datasheet, STM32G041K6U3TR pinout, STM32G041K6U3TR application, or STM32G041K6U3TR equivalent, key selection criteria include its 64 MHz Cortex-M0+ core, 32 KB securable Flash with ROP, 5 V-tolerant GPIOs, ultra-low-power Stop/Standby modes (down to 190 nA), and integrated cryptographic accelerators for firmware integrity and secure boot.

Technical Context

This MCU integrates an Arm Cortex-M0+ core with MPU, supporting TrustZone-like memory protection via Readout Protection (ROP) levels and securable Flash area. Its clock system combines 4–48 MHz HSE, 32 kHz LSE with calibration, and ±1% HSI16 RC oscillator with PLL-enabling precise timing for real-time control and communication stacks.

The peripheral interconnect includes flexible DMA mapping across 5 channels, dedicated DMAMUX, and NVIC with 32 external interrupts. Analog subsystem comprises 12-bit ADC (16-channel, hardware oversampling to 16-bit), internal temperature sensor, VREFINT, and VBAT monitoring-designed for closed-loop sensing and battery-backed operation.

Key Specifications

Pinout & Package

STM32G041K6U3TR uses the UFQFPN32 (5 × 5 mm, 0.5 mm pitch) package with 32-pin layout optimized for compact PCB designs and thermal efficiency in space-constrained applications.

Key Features

Applications

Equivalent & Alternatives

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

Compared with STM32G041K6U3TR, STM32G031K6T6 omits security accelerators and operates at lower temperature range, while STM32G071KBT6 adds USB and memory headroom-making the G041 optimal for balanced cost, security, and low-power embedded control where USB is not needed.

Availability

STM32G041K6U3TR is available at Aetrix Electronics and suitable for smart metering, industrial sensor nodes, medical wearables, and secure access terminals requiring stable component supply across extended product lifecycles.

Supply support for STM32G041K6U3TR 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 automotive-grade ICs, with over 40 years of innovation in embedded systems.

The STM32G0 series targets cost-sensitive, ultra-low-power applications demanding robust security and rich analog integration - designed specifically for industrial IoT, smart energy, and portable medical devices.

FAQ

What is the maximum operating frequency and voltage range of STM32G041K6U3TR?

The STM32G041K6U3TR operates at up to 64 MHz with a supply voltage range of 1.7 V to 3.6 V. Its internal 16 MHz RC oscillator has ±1% accuracy with PLL support, enabling precise clock derivation without external crystals in many applications. The device maintains full functionality across this voltage range, including all peripherals and low-power modes.

Does STM32G041K6U3TR support hardware-based secure boot and firmware encryption?

Yes. It features hardware-enforced Readout Protection (ROP) levels, a securable Flash area, AES-128/256 hardware accelerator, and True RNG - collectively enabling secure boot validation, encrypted firmware updates, and runtime key generation compliant with IEC 62443 and NIST SP 800-193 guidelines.

How many I/O pins are 5 V tolerant, and which packages support them?

STM32G041K6U3TR provides multiple 5 V-tolerant I/Os on PA0–PA15, PB0–PB15, and PC13–PC15 - confirmed in Table 51 of DS12993 Rev 4. These pins retain 5 V tolerance in all supported packages, including UFQFPN32 (U3TR), making level-shifter-free interfacing with 5 V peripherals feasible across form factors.

What low-power modes are available, and what is the minimum current consumption?

It offers Sleep, Stop 0/1, Standby, and Shutdown modes. Minimum current is 15 nA in Shutdown mode (VBAT off) and 20 nA in Standby mode (VBAT on, RTC active). Stop 0 draws 190 nA with RTC running - verified in Table 28 of DS12993 Rev 4 - enabling multi-year battery operation in intermittent-sensing applications.