STMicroelectronics STM32G041K8T6

Overview

STM32G041K8T6 from STMicroelectronics is a 32-bit Arm® Cortex®-M0+ microcontroller in LQFP32 package, featuring 64 KB Flash, 8 KB SRAM, 12-bit ADC (0.4 µs conversion), AES-128/256 encryption, and dual USARTs with LIN/IrDA support. It operates from 1.7–3.6 V across –40°C to 85°C and targets secure, low-power industrial sensor nodes and smart metering interfaces.

For engineers reviewing the STM32G041K8T6 datasheet, STM32G041K8T6 pinout, STM32G041K8T6 application, or STM32G041K8T6 equivalent, key selection criteria include its 64 MHz CPU clock, hardware RNG, 11-timer suite (including two low-power timers), and 5 V-tolerant GPIOs for robust peripheral interfacing in cost-sensitive embedded designs.

Technical Context

The STM32G041K8T6 integrates an Arm Cortex-M0+ core with MPU, supporting TrustZone-like memory protection via securable flash area and HW parity on SRAM. Its clock system combines 4–48 MHz HSE, 32 kHz LSE with calibration, and ±1% internal 16 MHz RC oscillator with PLL.

Peripheral interconnect uses a multi-layer AHB/APB bus matrix enabling concurrent DMA transfers across UART, SPI, I2C, and ADC. The 128 MHz-capable advanced timer (TIM1) supports complementary PWM outputs with dead-time insertion for motor control, while LPUART enables sub-µA wakeup from Stop mode.

Key Specifications

Pinout & Package

LQFP32 (7 × 7 mm, 0.8 mm pitch) package with exposed thermal pad; RoHS-compliant ECOPACK2.

Key Features

Applications

Equivalent & Alternatives

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

Compared with STM32G031K8T6, the G041K8T6 adds essential security primitives for OTA updates and data confidentiality; versus STM32F072CBT6, it trades USB for lower power, smaller form factor, and integrated crypto-making it optimal for sealed, battery-operated edge nodes.

Availability

STM32G041K8T6 is available at Aetrix Electronics and suitable for smart utility metering, industrial sensor nodes, secure access control systems, and motorized actuator interfaces requiring stable component supply and long-term manufacturability.

Supply support for STM32G041K8T6 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 devices, sensors, and analog ICs for industrial, automotive, and consumer markets.

The STM32G0 series targets cost-sensitive, ultra-low-power embedded applications requiring security, rich analog integration, and simplified development-positioned between legacy STM32F0 and higher-end G4 families.

FAQ

What is the maximum operating frequency and corresponding supply voltage range?

The STM32G041K8T6 achieves 64 MHz CPU frequency across its full 1.7–3.6 V supply range. At 1.7 V, the maximum frequency is reduced to 24 MHz per datasheet Section 5.3.1; full 64 MHz operation requires ≥2.0 V. Internal voltage regulator supports dynamic scaling between Run and Low-power Run modes.

Does this MCU support hardware-based secure boot and firmware integrity verification?

Yes. It implements Readout Protection (RDP) Levels 1 and 2 to prevent unauthorized debug access, plus a securable flash area where critical bootloader code can be locked against read/write. Combined with the hardware RNG and AES engine, it enables verified boot chains using SHA-256 signatures and encrypted firmware images.

How many I/O pins support 5 V tolerance, and which specific pins are they?

22 of the 26 GPIOs are 5 V-tolerant: all PAx, PBx, and PFx pins except PA11, PA12, and PF0. This is confirmed in Table 51 (I/O static characteristics) and Section 3.10 of the datasheet. These pins tolerate 5.5 V max input voltage regardless of VDD, enabling direct connection to 5 V peripherals.

What is the typical current consumption in Stop 0 mode, and what peripherals remain active?

Typical current in Stop 0 mode is 0.32 µA at 25°C with RTC and LSE running. In this mode, the 1.2 V regulator is disabled, but the VBAT domain remains powered to sustain RTC, backup registers, and tamper detection. LPUART and I2C can be configured to wake the device from Stop 0 using their respective event lines.