STMicroelectronics STM32F051R8T7

Overview

STM32F051R8T7 from STMicroelectronics is a 32-bit ARM Cortex-M0 microcontroller with 64 KB Flash, 8 KB SRAM, 48 MHz max CPU frequency, 12-bit ADC and DAC, and dual USART/I²C/SPI interfaces - deployed in industrial sensor nodes, motor control edge modules, and smart metering front-ends requiring low-power mixed-signal processing.

For engineers reviewing the STM32F051R8T7 datasheet, STM32F051R8T7 pinout, STM32F051R8T7 application, or STM32F051R8T7 equivalent, key selection criteria include its 64-pin LQFP package, 5 V-tolerant I/Os (up to 36), integrated capacitive touch sensing (18 channels), RTC with alarm/wakeup, and SWD debug support - all validated for cost-sensitive, battery-aware embedded designs.

Technical Context

The device integrates an ARM Cortex-M0 core with hardware parity-checked SRAM and CRC calculation unit, enabling deterministic real-time execution and data integrity verification in safety-conscious firmware. Its clock system combines 4–32 MHz external crystal, 32 kHz RTC oscillator, and internal 8 MHz RC with x6 PLL - supporting precise timing across active, Stop, and Standby modes.

Power architecture includes programmable voltage detector (PVD), VBAT backup supply for RTC/registers, and three low-power modes (Sleep, Stop, Standby) with sub-1 µA Standby current. Analog subsystem features one 12-bit 1.0 µs ADC (16-channel, 0–3.6 V range), one 12-bit DAC channel, and two fast comparators with programmable inputs - all sharing dedicated VDDA supply (2.4–3.6 V).

Key Specifications

Pinout & Package

LQFP64 (10 × 10 mm, 0.5 mm pitch) package with exposed thermal pad - optimized for manual soldering, thermal dissipation in industrial ambient (–40°C to +85°C), and PCB routing density in compact control modules.

Key Features

Applications

Equivalent & Alternatives

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

Compared with STM32F051R8T7, the STM32F072RBT6 adds USB but removes DAC and touch sensing, while the STM32G031K8T6 reduces pin count and adds crypto - making the F051R8T7 optimal where analog output, capacitive touch, and 64-pin I/O flexibility are essential.

Availability

STM32F051R8T7 is available at Aetrix Electronics and suitable for industrial sensor nodes, smart meter front-ends, BLDC motor controllers, and home appliance control panels requiring stable component supply across long-lifecycle production programs.

Supply support for STM32F051R8T7 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, designing and manufacturing microcontrollers, power devices, sensors, and analog ICs for industrial, automotive, and consumer markets.

The STM32F0 series targets cost-sensitive, energy-efficient embedded applications - delivering Cortex-M0 performance with rich analog/mixed-signal peripherals in compact packages for rapid time-to-market.

FAQ

What is the maximum operating frequency and supported voltage range for STM32F051R8T7?

The STM32F051R8T7 operates at up to 48 MHz using its internal PLL or external crystal, with digital supply (VDD) rated from 2.0 V to 3.6 V and analog supply (VDDA) from 2.4 V to 3.6 V. It includes a programmable voltage detector (PVD) that can trigger interrupts or resets at user-configurable thresholds between 2.2 V and 2.9 V, ensuring reliable operation during brownout conditions.

Does STM32F051R8T7 support hardware capacitive touch sensing?

Yes, it integrates a dedicated Touch Sensing Controller (TSC) supporting up to 18 capacitive sensing channels for touchkey, linear, and rotary sensors - implemented entirely in hardware with no CPU intervention. This enables low-power, jitter-free touch detection using standard GPIOs, eliminating the need for external touch ICs or complex software filtering.

Can STM32F051R8T7 generate complementary PWM with deadtime for motor control?

Yes, the advanced-control timer (TIM1) provides six complementary PWM outputs with fully programmable deadtime insertion (1–1023 × timer clock period) and an emergency stop input (BKIN) that immediately disables all outputs. This meets IEC 60335 and UL 60730 requirements for safe 3-phase motor drive in appliances and industrial equipment.

Is SWD debug supported, and what are the required pins?

Yes, Serial Wire Debug (SWD) is fully supported using only two pins: SWDIO (PA13) and SWCLK (PA14). No JTAG header is needed, reducing PCB footprint and debug connector cost. The interface supports full flash programming, breakpoint setting, and real-time variable inspection - compatible with ST-LINK v2/v3 and OpenOCD toolchains.