STMicroelectronics STM32F051C8U6

Overview

STM32F051C8U6 from STMicroelectronics is a 32-bit ARM® Cortex®-M0 microcontroller with 64 KB Flash, 8 KB SRAM (with hardware parity), and integrated peripherals including one 12-bit ADC (1.0 µs conversion), one 12-bit DAC, two analog comparators, and up to 36 5 V-tolerant I/Os - deployed in industrial sensor nodes and smart metering front-ends requiring low-power operation and analog signal conditioning.

For engineers reviewing the STM32F051C8U6 datasheet, STM32F051C8U6 pinout, STM32F051C8U6 application, or STM32F051C8U6 equivalent, key selection criteria include its 48 MHz max CPU frequency, 2.0–3.6 V supply range, 11 timer units (including advanced-control TIM1 with deadtime generation), RTC with alarm/wakeup, and dual USART/I²C/SPI interfaces supporting LIN, IrDA, and Fast Mode Plus I²C.

Technical Context

The STM32F051C8U6 implements an ARM Cortex-M0 core with Harvard architecture, supporting Thumb-2 instruction set and nested vectored interrupt controller (NVIC) for deterministic real-time response. It integrates a 4–32 MHz external crystal oscillator, internal 8 MHz RC with x6 PLL, and 40 kHz LSI for RTC and watchdog timing.

Its analog subsystem includes a single 12-bit ADC with 16-channel multiplexing and 0–3.6 V input range, a dedicated 12-bit DAC channel, and two programmable analog comparators with selectable inputs and outputs - all sharing a common analog supply (VDDA) decoupled from digital VDD.

Key Specifications

Pinout & Package

STM32F051C8U6 is housed in a 48-pin UFQFPN package (7 × 7 mm, 0.5 mm pitch), optimized for compact industrial and consumer PCB layouts with exposed thermal pad for enhanced heat dissipation.

Key Features

Applications

Equivalent & Alternatives

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

Compared with STM32F030F4P6 and STM32F070F6P6, the STM32F051C8U6 uniquely balances analog integration (ADC+DAC+comparators), timer richness (11 timers including advanced-control), and 5 V-tolerant I/Os - making it optimal for mixed-signal embedded systems where precision sensing and actuation coexist with digital control.

Availability

STM32F051C8U6 is available at Aetrix Electronics and suitable for industrial sensor nodes, smart energy meters, motor control modules, and home appliance UI controllers requiring stable component supply across extended production lifecycles.

Supply support for STM32F051C8U6 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, specializing in microcontrollers, power management, analog, MEMS, and automotive ICs.

The STM32F0 series targets cost-sensitive, low-power embedded applications demanding high peripheral integration and industrial-grade reliability - particularly in white goods, industrial automation, and smart infrastructure.

FAQ

What is the maximum operating frequency of the STM32F051C8U6?

The STM32F051C8U6 operates at a maximum CPU frequency of 48 MHz, achieved using the internal 8 MHz RC oscillator with 6× PLL multiplication or an external 4–32 MHz crystal. This frequency is fully supported across the entire industrial temperature range (–40°C to +85°C) and 2.0–3.6 V supply range, with all peripherals functional at full speed.

Does the STM32F051C8U6 support hardware parity checking on SRAM?

Yes, the STM32F051C8U6 includes hardware parity checking on its 8 KB SRAM. Parity errors trigger a HardFault exception, enabling immediate detection and handling of memory corruption - critical for safety-aware applications such as industrial control and metering where data integrity is mandated.

Can the STM32F051C8U6 generate complementary PWM signals with deadtime insertion?

Yes, the advanced-control timer (TIM1) provides six complementary PWM outputs with programmable deadtime insertion (up to 1023 × timer clock period) and emergency stop functionality via BKIN input. This enables direct driving of three-phase inverter bridges without external deadtime generators or gate driver ICs.

Is the STM32F051C8U6 pin-compatible with other STM32F051xx variants in the same package?

Yes, all STM32F051xx devices in the UFQFPN48 package (e.g., STM32F051C4U6, STM32F051C6U6, STM32F051C8U6) share identical pinouts and electrical characteristics. Firmware and PCB designs are interchangeable across flash density variants, allowing scalable development and late-stage BOM optimization.