STMicroelectronics STM32F051C8T7

Overview

STM32F051C8T7 from STMicroelectronics is a 32-bit ARM Cortex-M0 microcontroller with 64 KB Flash, 8 KB SRAM, 48 MHz max CPU frequency, integrated 12-bit ADC/DAC, and dual USART/I²C/SPI interfaces - deployed in industrial sensor nodes, motor control edge modules, and smart metering front-ends requiring deterministic real-time response and low-voltage operation (2.0–3.6 V).

For engineers reviewing the STM32F051C8T7 datasheet, STM32F051C8T7 pinout, STM32F051C8T7 application, or STM32F051C8T7 equivalent, key selection criteria include its 48 MHz Cortex-M0 core timing budget, 12-bit ADC conversion range (0–3.6 V), 5 V-tolerant I/O count (up to 36 pins), RTC with alarm/wakeup from Stop mode, and SWD debug interface compatibility.

Technical Context

The device implements a single-cycle ARM Cortex-M0 core with Thumb-2 instruction set, supporting deterministic interrupt latency down to 12 cycles. It integrates a programmable voltage detector (PVD), hardware CRC unit, and memory protection unit (MPU) for secure firmware execution.

Clock architecture includes dual oscillators: a 4–32 MHz external crystal for main system clock and a calibrated 32 kHz LSE for RTC; internal RC sources (8 MHz HSI, 40 kHz LSI) enable full boot without external components. PLL supports x6 multiplication for 48 MHz operation.

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 STM32F051C8T7, the F030F4P6 sacrifices analog integration for lower cost, while the G030F6P6 trades capacitive sensing for cryptographic acceleration and secure boot - both retain LQFP48 footprint but require peripheral revalidation.

Availability

STM32F051C8T7 is available at Aetrix Electronics and suitable for industrial sensor nodes, smart energy meters, BLDC motor control modules, and home appliance control boards requiring stable component supply across extended product lifecycles.

Supply support for STM32F051C8T7 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-grade components since 1987.

The STM32F0 series targets cost-sensitive, resource-constrained embedded applications demanding high reliability, low power, and rich analog integration - specifically engineered for industrial automation, appliance control, and smart metering.

FAQ

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

The STM32F051C8T7 operates at up to 48 MHz when supplied between 2.4 V and 3.6 V. At 2.0–2.4 V, maximum frequency is limited to 24 MHz per electrical characteristics (Section 6.3.1). This voltage-frequency scaling ensures stable timing margins across industrial voltage rails.

Does this MCU support hardware-accelerated cryptography or secure boot?

No. The STM32F051C8T7 lacks dedicated cryptographic accelerators (AES, SHA, PKA) and secure boot features. It provides basic security via read-out protection (RDP) and write protection (WRP) of Flash memory - suitable for non-critical firmware but not for secure key storage or authenticated boot.

Can the 12-bit DAC output drive a load directly, and what is its output voltage range?

Yes - the integrated 12-bit DAC supports rail-to-rail output (0 to VREF+), where VREF+ is typically VDDA (2.4–3.6 V). It drives loads ≥5 kΩ without external buffering; for lower impedances, an op-amp buffer is required to maintain linearity and settling time specs (≤10 µs).

How many I/O pins support external interrupt capability, and are they all 5 V tolerant?

All 55 GPIOs are mappable to external interrupt vectors via EXTI lines, but only up to 36 pins (PA0–PA15, PB0–PB15, PC13–PC15) are 5 V tolerant. Non-tolerant pins (e.g., those connected to analog peripherals) must remain within VDD ±0.3 V - verified in Section 6.3.14 of the datasheet.