STMicroelectronics STM32F051K8U6TR

Overview

STM32F051K8U6TR from STMicroelectronics is a 32-bit ARM® Cortex®-M0 microcontroller with 64 KB Flash, 8 KB SRAM, 48 MHz max CPU frequency, and integrated peripherals including 12-bit ADC, 12-bit DAC, two USARTs (one with LIN/IrDA), two I²C (one Fast Mode Plus), two SPI (18 Mbit/s), RTC, and capacitive touch sensing-used in industrial sensor nodes and smart metering front-ends.

For engineers reviewing the STM32F051K8U6TR datasheet, STM32F051K8U6TR pinout, STM32F051K8U6TR application, or STM32F051K8U6TR equivalent, key selection criteria include 5V-tolerant I/O count (up to 36), 1.0 µs ADC conversion time, dual low-power comparators, 18-channel capacitive sensing support, and UFBGA64 package thermal performance for compact PCB layouts.

Technical Context

The device implements an ARM Cortex-M0 core with Harvard architecture, supporting Thumb-2 instruction set and NVIC with 32 interrupt lines. It integrates a programmable voltage detector (PVD), hardware CRC unit, and memory protection unit (MPU) for secure firmware execution.

Clock system includes dual oscillators: 4–32 MHz HSE for precision timing and 32 kHz LSE for RTC, plus internal RC sources (8 MHz HSI with PLL, 40 kHz LSI). Power management supports Sleep, Stop, and Standby modes with VBAT backup for RTC and registers.

Key Specifications

Pinout & Package

STM32F051K8U6TR uses a 32-pin UFBGA (Ultra Fine Pitch Ball Grid Array) package, 5 × 5 mm, 0.5 mm pitch, with exposed thermal pad for enhanced thermal dissipation in space-constrained applications.

Key Features

Applications

Equivalent & Alternatives

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

Compared with STM32F051K8U6TR, STM32F030F4P6 trades analog integration for lower cost and simpler layout, while STM32G031F8P6 upgrades clock speed and adds USB but removes DAC and TSC-making the F051 optimal for mixed-signal, touch-enabled embedded control where balanced peripheral richness matters most.

Availability

STM32F051K8U6TR is available at Aetrix Electronics and suitable for industrial sensor nodes, smart energy meters, home appliance control panels, and motor drive starter kits requiring stable component supply across extended production lifecycles.

Supply support for STM32F051K8U6TR 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 integration, low power, and industrial-grade reliability-optimized for appliance control, industrial automation, and smart metering.

FAQ

What is the maximum operating temperature range for STM32F051K8U6TR?

The STM32F051K8U6TR is rated for industrial temperature range: –40 °C to +85 °C. This is confirmed in Section 6.3.1 of the datasheet (DocID022265 Rev 7), with thermal derating applied above 70 °C ambient when power dissipation exceeds 150 mW. The UFBGA64 package's θ_JA is 150 °C/W under standard JEDEC conditions.

Does STM32F051K8U6TR support USB connectivity?

No, STM32F051K8U6TR does not include a USB peripheral. It provides USART, SPI, I²C, and HDMI CEC interfaces-but no USB PHY or USB device controller. For USB-enabled variants in the same family, consider STM32F072xB or STM32G071xx, which integrate full-speed USB 2.0 device controllers.

Can the internal 12-bit DAC output drive a 1 kΩ load directly?

Yes-the DAC output (PB1) can source/sink up to ±5 mA per the electrical characteristics in Table 55 (DAC characteristics). At 3.3 V VDD, this supports direct driving of 1 kΩ loads with ≤3.3 V swing and <0.5% gain error, though external op-amp buffering is recommended for precision applications or loads <5 kΩ to maintain monotonicity and settling time.

How many independent PWM outputs can STM32F051K8U6TR generate simultaneously?

It supports up to 12 independent PWM outputs: 6 from TIM1 (advanced-control timer), 2 from TIM2, 2 from TIM3, and 2 from TIM15/TIM16 (general-purpose timers). All are configurable with programmable resolution (1–16 bits), deadtime (for complementary pairs), and automatic reload-enabling multi-channel motor control or LED dimming without CPU intervention.