STMicroelectronics STM32G041F6P6

Overview

STM32G041F6P6 from STMicroelectronics is an Arm® Cortex®-M0+ 32-bit microcontroller with 32 KB Flash, 8 KB SRAM, 1.7–3.6 V operation, and integrated AES-128/256 encryption and true random-number generator (RNG). It delivers up to 64 MHz CPU frequency, supports -40°C to 85°C industrial temperature range, and features two USARTs (one with ISO7816/LIN/IrDA), one LPUART, two I²C interfaces (Fast-mode Plus), and two SPIs - deployed in smart metering, industrial sensor nodes, and secure IoT edge devices.

For engineers reviewing the STM32G041F6P6 datasheet, STM32G041F6P6 pinout, STM32G041F6P6 application, or STM32G041F6P6 equivalent, key selection criteria include its 20-pin TSSOP package, 5 V-tolerant GPIOs, hardware-accelerated cryptography, low-power Stop/Standby modes (<1 µA), and SWD debug interface compatibility.

Technical Context

The STM32G041F6P6 integrates a single-core Arm Cortex-M0+ with Memory Protection Unit (MPU), enabling secure partitioning of code and data spaces. Its clock system combines internal 16 MHz RC (±1%) and 32 kHz RC (±5%), plus external 4–48 MHz crystal and 32.768 kHz RTC oscillator with calibration - supporting precise timing for real-time control and battery-backed calendar functions.

Peripheral interconnect uses a hierarchical AHB/APB bus matrix with DMA request multiplexer (DMAMUX), allowing flexible routing of 5-channel DMA across ADC, timers, USARTs, and SPIs. The 12-bit ADC achieves 0.4 µs conversion time over 0–3.6 V range and supports hardware oversampling up to 16-bit resolution.

Key Specifications

Pinout & Package

TSSOP20 (YA) package: 20-pin thin shrink small outline package, 6.4 × 4.4 mm body, 0.65 mm pitch, ECOPACK2 compliant. Pinout validated per STMicroelectronics DS12993 Rev 4, Section 4 (Pin assignment and description), Table 12.

Key Features

Applications

Equivalent & Alternatives

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

Compared with STM32G031F6P6, the G041F6P6 adds essential security and ultra-low-power features at minimal cost premium; versus G041K6T6, it trades pin count and interface count for compactness and lower BOM footprint in space-constrained TSSOP layouts.

Availability

STM32G041F6P6 is available at Aetrix Electronics and suitable for smart metering, industrial sensor nodes, and secure access control systems requiring stable component supply, long-term lifecycle assurance, and ECOPACK2 compliance.

Supply support for STM32G041F6P6 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 management ICs, MEMS, and automotive-grade components since 1987.

The STM32G0 series targets cost-sensitive, power-constrained embedded applications - delivering Cortex-M0+ performance with advanced security, analog integration, and ultra-low-power modes for IoT edge nodes and industrial controls.

FAQ

Does STM32G041F6P6 support USB connectivity?

No. The STM32G041F6P6 does not integrate a USB peripheral or PHY. It relies on external USB-to-UART bridges (e.g., CP2102N) or wireless interfaces (BLE, LoRa) for host connectivity. This omission reduces die size and cost while maintaining focus on low-power sensor and control applications where USB is rarely required.

What is the maximum operating frequency with internal RC oscillator?

The internal 16 MHz RC oscillator (HSI16) achieves ±1% accuracy across temperature and voltage when used with PLL to reach 64 MHz CPU frequency. Without PLL, HSI16 runs at 16 MHz nominal; direct use at 64 MHz requires external crystal or HSE input per DS12993 Rev 4 Section 3.9 and Table 41.

Can the 32 KB Flash be protected against unauthorized readout?

Yes. The device implements Readout Protection (ROP) Level 1 and Level 2. Level 2 permanently disables debug access and flash readout via SWD, and locks the securable area - verified in DS12993 Rev 4 Section 3.3.1 and Table 3. This meets IEC 62443-3-3 requirements for secure firmware storage.

Is VBAT pin mandatory for RTC operation?

No. VBAT is optional but required to retain RTC time, calendar, and 32 B backup registers during main power removal. When VBAT is unconnected, RTC stops and backup registers reset on VDD power cycle. For battery-backed operation, connect a 1.8–3.6 V source (e.g., CR1220) with recommended 100 nF decoupling per DS12993 Rev 4 Section 3.7.6.