STMicroelectronics STM32F051C6U6

Overview

STM32F051C6U6 from STMicroelectronics is a 32-bit ARM Cortex-M0 microcontroller in UFQFPN48 (7x7 mm) package, featuring 32 KB Flash, 8 KB SRAM with hardware parity, 48 MHz max CPU frequency, one 12-bit ADC (1.0 µs conversion), one 12-bit DAC, two analog comparators, and integrated capacitive touch sensing (up to 18 channels). It targets cost-sensitive industrial control and smart sensor nodes requiring low-power operation and mixed-signal integration.

For engineers reviewing the STM32F051C6U6 datasheet, STM32F051C6U6 pinout, STM32F051C6U6 application, or STM32F051C6U6 equivalent, key selection criteria include its 48 MHz Cortex-M0 core, 32 KB Flash/8 KB SRAM memory configuration, 55 fast I/Os (36 with 5 V tolerance), dual low-power analog comparators, and support for capacitive touch sensing without external components.

Technical Context

The STM32F051C6U6 implements an ARM Cortex-M0 core with Harvard architecture, supporting Thumb-2 instruction set and NVIC with 32 interrupt lines. Its clock system integrates multiple sources: 4–32 MHz HSE crystal, 32 kHz LSE for RTC, 8 MHz HSI with x6 PLL, and 40 kHz LSI - enabling precise timing control across active and low-power modes.

Peripherals are tightly coupled via AHB/APB buses: the 12-bit ADC supports up to 16 channels with 0–3.6 V input range and separate VDDA supply; the single-channel 12-bit DAC is driven by TIM6; and the TSC block enables self-capacitance measurement on up to 18 GPIOs for touchkey and rotary sensor interfaces.

Key Specifications

Pinout & Package

STM32F051C6U6 uses the UFQFPN48 (7 × 7 mm, 0.5 mm pitch) package, RoHS-compliant and ECOPACK®2 certified. Pin layout supports full peripheral mapping with dedicated SWD debug, reset, and power domains (VDD/VDDA/VSS/VSSA/VBAT).

Key Features

Applications

Equivalent & Alternatives

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

Compared with STM32F030F4P6 and STM32F070F6P6, the STM32F051C6U6 uniquely combines capacitive touch sensing, dual analog comparators, and a DAC in a compact 48-pin package - making it optimal for space-constrained human-interface and mixed-signal control applications where feature density matters more than USB or lowest BOM cost.

Availability

STM32F051C6U6 is available at Aetrix Electronics and suitable for industrial sensor nodes, smart home touch panels, motor control modules, and USB-C power monitors requiring stable component supply and long-term production support.

Supply support for STM32F051C6U6 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 semiconductors.

The STM32F0 series targets cost-sensitive, low-power embedded applications requiring ARM Cortex-M0 performance with rich analog and timing peripherals - optimized for industrial automation, appliance control, and human-machine interface designs.

FAQ

What is the maximum operating frequency and supply voltage range for STM32F051C6U6?

The STM32F051C6U6 operates at up to 48 MHz using its internal 8 MHz HSI oscillator with PLL, or external crystal up to 32 MHz. Its digital supply (VDD) ranges from 2.0 V to 3.6 V, while the analog supply (VDDA) accepts 2.4 V to 3.6 V - ensuring stable ADC/DAC operation across wide input conditions.

Does STM32F051C6U6 support hardware-based capacitive touch sensing?

Yes, it integrates a dedicated Touch Sensing Controller (TSC) supporting up to 18 self-capacitance channels. This enables robust touchkey, linear slider, and rotary encoder implementations without external components, with built-in charge transfer, filtering, and spread-spectrum modulation to reject noise.

Can STM32F051C6U6 generate precise PWM signals with deadtime for motor control?

Yes, the advanced-control timer (TIM1) provides 6-channel complementary PWM output with programmable deadtime insertion (1–1023 ns resolution) and emergency stop functionality - directly driving half-bridge or three-phase inverter gate drivers with hardware-enforced safety.

What debug interface does STM32F051C6U6 use, and how many pins are required?

It uses Serial Wire Debug (SWD), requiring only two pins: PA13 (SWDIO) and PA14 (SWCLK). This 2-pin interface supports full JTAG-equivalent functionality - including flash programming, real-time variable inspection, and breakpoint management - minimizing PCB footprint versus traditional JTAG.