STMicroelectronics STM32G051G6U6

Overview

STM32G051G6U6 from STMicroelectronics is a 32-bit Arm® Cortex®-M0+ microcontroller in UFQFPN28 package, operating up to 64 MHz with 32 KB Flash and 18 KB SRAM. It integrates dual 12-bit DACs, 12-bit ADC (0.4 µs conversion), two fast analog comparators, RTC with calendar, and communication interfaces including two I²C (Fast-mode Plus), two USARTs (one with ISO7816/LIN/IrDA), and two SPIs - deployed in industrial sensor nodes requiring low-power operation and mixed-signal control.

For engineers reviewing the STM32G051G6U6 datasheet, STM32G051G6U6 pinout, STM32G051G6U6 application, or STM32G051G6U6 equivalent, key selection criteria include its 28-pin UFQFPN footprint, 1.7–3.6 V supply range, -40°C to 105°C extended temperature grade, and support for Stop/Standby/Shutdown low-power modes with sub-µA retention current.

Technical Context

The STM32G051G6U6 implements an Arm Cortex-M0+ core with MPU, supporting TrustZone-like memory protection via securable flash area and hardware parity on 16 KB of SRAM. Its clock system combines 4–48 MHz HSE, 32 kHz LSE with calibration, and internal 16 MHz HSI with PLL for precise timing across mixed-signal peripherals.

Peripheral interconnect uses dedicated DMA channels (7-channel controller) and flexible alternate function mapping across GPIO ports A/B/C/D/F. Analog subsystem includes rail-to-rail comparators with programmable hysteresis, dual DACs with sample-and-hold, and ADC with hardware oversampling up to 16-bit effective resolution - enabling closed-loop control without external signal conditioning.

Key Specifications

Pinout & Package

STM32G051G6U6 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. Pin assignment follows ST's standard STM32G0 series layout optimized for minimal PCB area and thermal performance in space-constrained designs.

Key Features

Applications

Equivalent & Alternatives

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

Compared with STM32G031F6P6, the STM32G051G6U6 adds dual DACs and LPUART for analog calibration and low-power wireless wake-up; versus STM32G071GBU6, it trades USB and memory headroom for smaller size and lower BOM cost in resource-constrained edge nodes.

Availability

STM32G051G6U6 is available at Aetrix Electronics and suitable for industrial sensor nodes, smart meter interfaces, motor control modules, and medical diagnostic handhelds requiring stable component supply across long-lifecycle deployments.

Supply support for STM32G051G6U6 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 ICs, sensors, and analog components for industrial, automotive, and consumer markets.

The STM32G0 series targets cost-sensitive, power-efficient embedded applications requiring Arm Cortex-M0+ performance with rich analog integration - optimized for smart sensors, metering, and human-machine interface devices.

FAQ

What is the maximum operating frequency and supported voltage range?

The STM32G051G6U6 operates at up to 64 MHz and supports a supply voltage range of 1.7 V to 3.6 V. This allows direct compatibility with single-cell lithium batteries (2.5–3.6 V), regulated 3.3 V rails, and energy-harvesting sources down to 1.7 V - with all peripherals fully functional across the entire range.

Does this MCU support hardware encryption or secure boot features?

Yes - it includes readout protection (ROP) levels, a securable flash area for protected bootloader code, and a hardware CRC unit for firmware signature verification. While it lacks dedicated AES engines, the securable area and ROP enable secure boot chain implementation compliant with IEC 62443 Level 1 requirements.

Can the two DAC outputs be used simultaneously with independent triggers?

Yes - both 12-bit DACs operate independently with configurable triggers (timers, software, external events) and built-in sample-and-hold. They support simultaneous or staggered updates, enabling dual-channel waveform generation or differential analog output for precision sensor excitation.

What debug interface does the STM32G051G6U6 use, and what pins are required?

It uses Serial Wire Debug (SWD) via dedicated pins PA13 (SWDIO) and PA14 (SWCLK). No reset pin is mandatory for SWD, though NRST improves reliability during firmware recovery. The interface supports full-speed debugging, flash programming, and real-time variable inspection using standard ST-LINK or CMSIS-DAP tools.