STMicroelectronics STM32F051C8T6

Overview

STM32F051C8T6 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 integrated capacitive touch sensing-designed for cost-sensitive industrial control and smart sensor nodes requiring low-power operation and analog integration.

For engineers reviewing the STM32F051C8T6 datasheet, STM32F051C8T6 pinout, STM32F051C8T6 application, or STM32F051C8T6 equivalent, key selection criteria include Flash/SRAM size, 5 V-tolerant I/O count (up to 36), RTC with alarm, dual USARTs with IrDA/LIN support, and hardware CRC for firmware integrity verification.

Technical Context

The STM32F051C8T6 implements an 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 parity checking on SRAM, and a 96-bit unique ID for secure device identification.

Clock management includes dual oscillators (4–32 MHz HSE + 32 kHz LSE), internal 8 MHz RC with x6 PLL, and 40 kHz LSI for watchdog and RTC backup. Power management supports Sleep, Stop, and Standby modes with VBAT retention for RTC and backup registers.

Key Specifications

Pinout & Package

LQFP-48 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 STM32F051C8T6, the F030F4P6 reduces cost but sacrifices DAC and touch capability essential for analog-rich designs, while the G031F8P6 adds security features at the expense of capacitive sensing-making the F051C8T6 optimal for cost-sensitive, analog-integrated embedded control.

Availability

STM32F051C8T6 is available at Aetrix Electronics and suitable for industrial motor control, smart sensor nodes, human-machine interfaces, and power supply monitoring requiring stable component supply across long-lifecycle production programs.

Supply support for STM32F051C8T6 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, delivering silicon solutions for automotive, industrial, and consumer markets since 1987.

The STM32F0 series targets cost-optimized, entry-level embedded applications with Cortex-M0 cores, emphasizing analog integration, low-power operation, and ease of migration within the STM32 ecosystem.

FAQ

What is the maximum operating frequency and corresponding supply voltage range?

The STM32F051C8T6 operates at up to 48 MHz when supplied with 2.4–3.6 V. At 2.0–2.4 V, maximum frequency is reduced to 24 MHz per datasheet Section 6.3.1. This voltage-frequency scaling ensures reliable timing margins across industrial temperature ranges and avoids timing violations in peripheral clock trees.

Does this MCU support USB or Ethernet connectivity?

No, the STM32F051C8T6 does not integrate USB or Ethernet peripherals. It provides USART, SPI, I2C, and HDMI CEC interfaces only. For USB connectivity, designers should consider STM32F072 or STM32G071 variants; Ethernet requires external PHY with SPI or RMII-capable MCUs like STM32F4 or STM32H7 series.

How many I/O pins are 5 V tolerant, and which ports support this feature?

36 GPIOs are 5 V tolerant, covering all pins of Port A (PA0–PA15), Port B (PB0–PB15), and Port C (PC0–PC6). This is confirmed in Table 13 (Pin Definitions) and Section 6.3.14 of the datasheet. Pins marked "FT" in the pinout table support 5 V logic levels regardless of VDD, enabling direct interfacing with 5 V sensors or legacy controllers.

Is the internal 8 MHz RC oscillator factory-calibrated, and what is its accuracy over temperature?

Yes, the internal 8 MHz RC oscillator is factory-trimmed to ±1% accuracy at 25 °C and maintains ±2% over –40 °C to +85 °C (Section 6.3.8). It supports automatic trimming via RCC_CR register bits, allowing runtime calibration against an external reference for improved timing stability in clock-critical applications like UART baud generation.