STMicroelectronics STM32F051K8T7

Overview

STM32F051K8T7 from STMicroelectronics is a 32-bit ARM Cortex-M0 microcontroller in UFQFPN32 (5 × 5 mm) package, featuring 64 KB Flash, 8 KB SRAM with hardware parity, 48 MHz max CPU frequency, one 12-bit ADC (1.0 µs conversion), one 12-bit DAC, and dual USARTs with LIN/IrDA support - deployed in industrial sensor nodes and smart metering front-ends.

For engineers reviewing the STM32F051K8T7 datasheet, STM32F051K8T7 pinout, STM32F051K8T7 application, or STM32F051K8T7 equivalent, key selection criteria include 5 V-tolerant I/O count (up to 27 pins), low-power Stop/Standby modes with RTC wakeup, integrated capacitive touch sensing (18 channels), and dual SPI/I2C interfaces with Fast Mode Plus support.

Technical Context

The STM32F051K8T7 implements an ARM Cortex-M0 core with Harvard bus architecture and 3-stage pipeline, supporting Thumb-2 instruction set and NVIC with 32 interrupt vectors. Its memory subsystem includes 64 KB of single-cycle Flash with prefetch buffer and 8 KB SRAM with error-detection parity logic.

Clock management integrates four independent sources: 4–32 MHz HSE crystal oscillator, 32 kHz LSE for RTC, 8 MHz HSI RC with PLL (×6 → 48 MHz), and 40 kHz LSI for watchdogs. Power control supports three low-power modes (Sleep, Stop, Standby) with programmable voltage detector (PVD) and VBAT backup for RTC registers.

Key Specifications

Pinout & Package

STM32F051K8T7 uses the UFQFPN32 (5 × 5 mm, 0.5 mm pitch) package, optimized for space-constrained industrial and consumer applications requiring thermal efficiency and reflow compatibility.

Key Features

Applications

Equivalent & Alternatives

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

Compared with STM32F030F4P6, the STM32F051K8T7 adds DAC, TSC, and 5 V-tolerant I/O - enabling richer analog interaction. Against STM32G031F8P6, it trades modern security features for mature touch integration, making it optimal for cost-sensitive HMI where touch is central.

Availability

STM32F051K8T7 is available at Aetrix Electronics and suitable for industrial sensor nodes, smart energy meters, motor control gateways, and home appliance HMIs requiring stable component supply across extended product lifecycles.

Supply support for STM32F051K8T7 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 devices, sensors, and analog ICs for industrial, automotive, and consumer markets.

The STM32F0 series targets cost-sensitive, resource-constrained embedded applications requiring high integration, ultra-low power, and robust peripheral sets - especially where analog signal acquisition and human-machine interface are central.

FAQ

What is the maximum operating temperature range for STM32F051K8T7?

The STM32F051K8T7 is rated for industrial temperature range: –40 °C to +85 °C. This is validated per ST's qualification standards (AEC-Q100 not required; JEDEC JESD47-compliant). Thermal derating begins above 70 °C ambient when operating at 48 MHz with all peripherals active.

Does STM32F051K8T7 support USB connectivity?

No, the STM32F051K8T7 does not include a USB peripheral. It offers USART, SPI, I2C, and HDMI CEC interfaces instead. For USB host/device functionality, ST recommends the STM32F042x6 or STM32F072xB families, which integrate USB 2.0 FS PHY and device stack support.

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

Yes, the 8 MHz HSI oscillator can drive the system clock directly, but its factory-trimmed accuracy is ±1% at 25 °C and degrades to ±4.5% over –40 °C to +85 °C. For time-critical applications like UART baud generation, ST recommends enabling HSI calibration via the RCC_HSICALIBR register or using the PLL for improved stability.

How many I/O pins support external interrupt capability?

All 27 GPIO pins on the STM32F051K8T7 (PA0–PA15, PB0–PB11) can be configured as external interrupt sources via the EXTI line mapping. Each pin maps to one of 16 EXTI lines (PA0 and PB0 both map to EXTI0), allowing flexible wake-from-Stop event triggering on any I/O.