STMicroelectronics STM32G051G8U6

Overview

STM32G051G8U6 from STMicroelectronics is a 32-bit Arm® Cortex®-M0+ microcontroller in UFQFPN28 package, operating up to 64 MHz with 64 KB Flash, 18 KB SRAM, and integrated peripherals including dual USARTs, two 12-bit DACs, 12-bit ADC (0.4 µs conversion), RTC with alarm, and low-power timers-used in battery-powered sensor nodes and industrial control edge devices.

For engineers reviewing the STM32G051G8U6 datasheet, STM32G051G8U6 pinout, STM32G051G8U6 application, or STM32G051G8U6 equivalent, key selection criteria include its 64 MHz CPU clock, 1.7–3.6 V supply range, -40°C to 125°C extended temperature grade, 5 V-tolerant I/Os, and SWD debug interface for rapid firmware validation.

Technical Context

The STM32G051G8U6 implements an Arm Cortex-M0+ core with Memory Protection Unit (MPU) and supports multiple clock sources: 4–48 MHz HSE crystal, 32 kHz LSE with calibration, 16 MHz HSI RC with PLL, and 32 kHz LSI RC (±5%). Its interconnect architecture routes peripherals-including two I2C (one Fast-mode Plus), two SPI (32 Mbit/s), and two USARTs-through a flexible AHB/APB matrix.

Power management includes programmable Brownout Reset (BOR), voltage detector (PVD), and four low-power modes (Sleep, Stop, Standby, Shutdown) with sub-μA shutdown current and RTC/backup register retention via VBAT. The device integrates hardware CRC, 96-bit unique ID, and ECOPACK2-compliant packaging.

Key Specifications

Pinout & Package

STM32G051G8U6 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. Pinout conforms to ST's standard G0-series layout for UFQFPN28 (package code A0B0), supporting full peripheral mapping and 5 V-tolerant I/Os on designated pins.

Key Features

Applications

Equivalent & Alternatives

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

Compared with STM32G071GBU6 and STM32F072CBT6, the STM32G051G8U6 delivers optimal balance of low-power operation, extended temperature capability, and rich analog/peripheral integration at minimal pin count and footprint-making it ideal for space-constrained, battery-operated, or thermally demanding embedded control.

Availability

STM32G051G8U6 is available at Aetrix Electronics and suitable for industrial sensor nodes, smart meter interfaces, and automotive body electronics requiring stable component supply, long lifecycle assurance, and full production traceability.

Supply support for STM32G051G8U6 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 silicon.

The STM32G0 series targets entry-level embedded applications demanding high integration, ultra-low power, and robust security-optimized for cost-sensitive, battery-powered, and industrial edge devices.

FAQ

Does STM32G051G8U6 support USB device functionality?

No. The STM32G051G8U6 does not integrate a USB transceiver or USB controller. It lacks dedicated USB PHY and USB-specific registers. For USB-enabled designs, ST recommends the STM32G071 or STM32G081 variants, which include full-speed USB 2.0 device support with built-in PHY and descriptor handling.

What is the maximum allowed VDD slew rate during power-up?

The STM32G051G8U6 requires VDD ramp time ≥ 1 ms from 0 V to minimum operating voltage (1.7 V). Exceeding 1 V/ms slew rate may cause improper POR circuit activation or metastability in internal latches; ST specifies this in Section 5.3.2 of DS13303 Rev 4.

Can the internal 32 kHz RC oscillator be used for RTC calibration?

Yes. The internal 32 kHz RC oscillator (LSI) can serve as RTC clock source, and its frequency is factory-trimmed to ±5% accuracy. For higher precision, the 32.768 kHz external crystal (LSE) with calibration register (RTCCAL) achieves ±1 ppm stability after software calibration using the RTC calibration register.

How many I/O pins support external interrupt capability?

All 44 GPIOs on STM32G051G8U6 support external interrupt generation via the EXTI controller. Each pin maps to a dedicated EXTI line (PA0 → EXTI0, PB1 → EXTI1, etc.), and up to 16 lines can trigger interrupts simultaneously with configurable priority and event/IRQ mode selection in NVIC.