STMicroelectronics STM32F038G6U6

Overview

STM32F038G6U6 from STMicroelectronics is a 32-bit ARM® Cortex®-M0 microcontroller in UFQFPN32 (5 × 5 mm) package, featuring 32 KB Flash, 4 KB SRAM with hardware parity, and operation at up to 48 MHz. It integrates a 12-bit ADC (1.0 µs conversion), nine timers-including one advanced-control timer with deadtime generation-and communication interfaces including I²C Fast Mode Plus (1 Mbit/s), USART with IrDA/LIN/ISO7816, and SPI (18 Mbit/s). It targets compact industrial control nodes requiring robust timing, analog sensing, and low-voltage operation (1.8 V ±8%).

For engineers reviewing the STM32F038G6U6 datasheet, STM32F038G6U6 pinout, STM32F038G6U6 application, or STM32F038G6U6 equivalent, key selection considerations include its 1.8 V core supply, 5 V-tolerant I/O capability on up to 25 pins, extended temperature range (–40 to +105°C), and integrated RTC with alarm and periodic wakeup from Stop mode.

Technical Context

The STM32F038G6U6 implements a single-cycle ARM Cortex-M0 core with Thumb-2 instruction set, supporting deterministic real-time execution up to 48 MHz. Its clock system includes dual oscillators-4–32 MHz HSE and 32.768 kHz LSE-with internal 8 MHz HSI (±1% typical after calibration) and 40 kHz LSI, plus a PLL for frequency multiplication.

Peripheral integration centers on deterministic timing control: TIM1 provides six-channel PWM with programmable deadtime and emergency stop; TIM2/TIM3 support IR decoding via input capture; and the 12-bit ADC operates across 0–3.6 V with separate VDDA supply (2.4–3.6 V), enabling accurate sensor interfacing without external reference.

Key Specifications

Pinout & Package

STM32F038G6U6 is housed in a 32-pin Ultra-Fine Pitch Quad Flat No-lead (UFQFPN32) package measuring 5 mm × 5 mm with 0.5 mm pitch. The package features an exposed thermal pad for enhanced heat dissipation in compact PCB layouts.

Key Features

Applications

Equivalent & Alternatives

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

Compared with STM32F038G6U6, the STM32F070F6P6 trades advanced timer and I/O robustness for lower cost and smaller footprint, while the STM32F042F6P6 adds USB at the expense of RTC calendar and Flash capacity - making the G6U6 optimal for time-aware, high-integrity industrial edge nodes.

Availability

STM32F038G6U6 is available at Aetrix Electronics and suitable for industrial motor control, smart energy metering, and automotive body electronics requiring stable component supply across extended temperature and low-voltage operating conditions.

Supply support for STM32F038G6U6 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, sensors, and analog components for industrial, automotive, and consumer markets.

The STM32F0-series targets cost-sensitive, resource-constrained embedded applications demanding high reliability, low power, and rich peripheral integration - with the F038 variant optimized for industrial control and metering where timing precision, analog accuracy, and extended temperature operation are critical.

FAQ

What is the maximum allowed VDDA voltage for the STM32F038G6U6?

The absolute maximum VDDA is 3.6 V, and the recommended operating range is 2.4 V to 3.6 V. Exceeding 3.6 V risks permanent damage to the ADC, reset circuitry, and internal voltage reference. VDDA must be ≥ VDD and decoupled independently using a 100 nF ceramic capacitor close to the VDDA pin.

Does the STM32F038G6U6 support hardware CRC calculation?

Yes, it includes a dedicated cyclic redundancy check (CRC) calculation unit compliant with IEEE-802.3, supporting 32-bit polynomial (0x04C11DB7) and byte/word data input. This enables fast, deterministic checksum generation for firmware image validation and communication frame integrity checking without CPU overhead.

Can the STM32F038G6U6 operate without an external crystal?

Yes - it can run entirely from internal oscillators: the 8 MHz HSI (calibrated to ±1% typical) with x6 PLL for 48 MHz system clock, and the 40 kHz LSI for RTC and watchdogs. External crystals are optional but recommended for precise timing (e.g., UART baud rate accuracy or RTC calendar stability).

How many I/O pins support 5 V tolerance on the STM32F038G6U6?

Up to 25 I/O pins are 5 V tolerant across GPIO ports A and B, as specified in Section 3.7 of the datasheet. These pins accept input voltages up to 5.5 V regardless of VDD level, enabling direct interfacing with 5 V logic families and legacy peripherals without external level-shifting circuitry.