STMicroelectronics STM32F051C6T6TR

Overview

STM32F051C6T6TR from STMicroelectronics is an ARM® Cortex®-M0 32-bit microcontroller with 32 KB Flash, 8 KB SRAM, 48 MHz max CPU frequency, integrated 12-bit ADC and DAC, and dual USART/I²C/SPI interfaces - deployed in industrial sensor nodes, smart metering front-ends, and low-power HMI control panels.

For engineers reviewing the STM32F051C6T6TR datasheet, STM32F051C6T6TR pinout, STM32F051C6T6TR application, or STM32F051C6T6TR equivalent, key selection criteria include Flash/SRAM size, 5 V-tolerant I/O count (up to 36), RTC+backup register support, and SWD debug compatibility for firmware validation in resource-constrained embedded designs.

Technical Context

The STM32F051C6T6TR implements a single-cycle ARM Cortex-M0 core with Harvard bus architecture, supporting Thumb-2 instruction set and NVIC with 32 interrupt lines. It integrates a programmable voltage detector (PVD), hardware CRC unit, and independent/system watchdog timers for deterministic real-time operation.

Clock management includes dual oscillators: 4–32 MHz external crystal (HSE) and 32 kHz LSE for RTC calibration, plus internal 8 MHz RC (HSI) with x6 PLL for precise 48 MHz system clock generation - all configurable via RCC registers without external components.

Key Specifications

Pinout & Package

LQFP48 package (7 × 7 mm, 0.5 mm pitch), RoHS-compliant ECOPACK®2, rated for industrial temperature range (–40 °C to +85 °C).

Key Features

Applications

Equivalent & Alternatives

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

Compared with STM32F030F4P6 and STM32F070F6P6, the STM32F051C6T6TR delivers full analog integration (ADC+DAC+comparators), hardware-based motor control features (TIM1 deadtime/emergency stop), and RTC+VBAT retention - making it the only option among the three qualified for time-critical, mixed-signal, and safety-monitored embedded systems.

Availability

STM32F051C6T6TR is available at Aetrix Electronics and suitable for industrial sensor nodes, smart energy meter front-ends, and low-power HMI control panels requiring stable component supply across multi-year production cycles.

Supply support for STM32F051C6T6TR 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, and automotive-grade ICs with ISO 9001-certified manufacturing.

The STM32F0 series targets cost-sensitive, ultra-low-power embedded applications demanding high peripheral integration and industrial temperature reliability - optimized for sensor fusion, motor control, and human-machine interface subsystems.

FAQ

What is the maximum operating frequency and supported voltage range?

The STM32F051C6T6TR operates at up to 48 MHz using its internal PLL and supports a digital supply voltage range of 2.0 V to 3.6 V. The analog supply (VDDA) must be between 2.4 V and 3.6 V, and the device guarantees full functionality across the industrial temperature range (–40 °C to +85 °C) under these conditions.

Does this MCU support hardware encryption or secure boot features?

No, the STM32F051C6T6TR does not include hardware cryptographic accelerators or secure boot circuitry. It lacks AES, RSA, or hash engines, and has no ROM-based bootloader with signature verification. Security relies on software-implemented algorithms and external secure elements if required.

Can the internal 8 MHz RC oscillator be used as the system clock without external crystals?

Yes - the internal 8 MHz HSI oscillator can serve as the system clock source directly or feed the PLL to generate 48 MHz. However, its ±1% factory calibration limits timing precision for UART baud rates or USB (not supported on F051), so external crystals are recommended for communication-critical applications.

How many I/O pins support 5 V tolerance, and which packages include them?

Up to 36 I/O pins are 5 V tolerant on the STM32F051C6T6TR, regardless of package. This includes all GPIOs on ports A, B, and C except PC13–PC15 (RTC-related). The LQFP48 package used by this variant fully exposes these 5 V-tolerant pins, enabling direct connection to 5 V sensors, displays, and logic without level-shifting circuitry.