STMicroelectronics STM32F051K6U7TR

Overview

STM32F051K6U7TR from STMicroelectronics is a 32-bit ARM Cortex-M0 microcontroller in UFQFPN32 (5 × 5 mm) package, featuring 32 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 STM32F051K6U7TR datasheet, STM32F051K6U7TR pinout, STM32F051K6U7TR application, or STM32F051K6U7TR 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 I2C interfaces including Fast Mode Plus (1 Mbit/s).

Technical Context

The device implements an ARM Cortex-M0 core with Harvard architecture, supporting Thumb-2 instruction set and NVIC with 32 interrupt lines. Memory subsystem includes 32 KB of single-cycle Flash with prefetch buffer and 8 KB SRAM with error-detection parity logic - enabling deterministic real-time execution in safety-aware edge control applications.

Clock system integrates multiple sources: 4–32 MHz HSE crystal oscillator, 32 kHz LSE for RTC, 8 MHz HSI RC with x6 PLL for system clock, and 40 kHz LSI for watchdog timing. Power management supports three low-power modes (Sleep, Stop, Standby) with programmable voltage detector (PVD) and VBAT backup supply for RTC and 42 backup registers.

Key Specifications

Pinout & Package

STM32F051K6U7TR uses the UFQFPN32 (5 × 5 mm, 0.5 mm pitch) package with 32-pin layout optimized for compact industrial PCBs. Thermal pad on underside improves power dissipation during sustained 48 MHz operation.

Key Features

Applications

Equivalent & Alternatives

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

Compared with STM32F030F4P6 and STM32F070F6P6, the STM32F051K6U7TR uniquely combines 32 KB Flash, integrated DAC, 12-bit ADC, and capacitive touch sensing in a 32-pin QFN - making it optimal for space-constrained, analog-rich HMI and sensor fusion applications where USB is unnecessary.

Availability

STM32F051K6U7TR is available at Aetrix Electronics and suitable for industrial sensor nodes, smart energy meters, motor control gateways, and appliance HMI panels requiring stable component supply across multi-year production cycles.

Supply support for STM32F051K6U7TR 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 sensors, and automotive-grade components since 1987.

The STM32F0 series targets cost-sensitive, low-power embedded applications demanding Cortex-M0 performance with rich analog integration - specifically engineered for industrial automation, consumer appliances, and smart metering where Flash size, peripheral density, and package footprint are critical.

FAQ

What is the maximum operating temperature range for STM32F051K6U7TR?

The STM32F051K6U7TR is qualified for industrial temperature range: –40 °C to +85 °C ambient. This is confirmed in Section 6.3.1 of the official datasheet (DocID022265 Rev 7), with thermal derating applied above 70 °C for continuous 48 MHz operation under worst-case VDD conditions.

Does STM32F051K6U7TR support hardware encryption or secure boot?

No. The STM32F051K6U7TR does not include hardware cryptographic accelerators (AES, SHA, PKA) or secure boot ROM. It lacks TrustZone or embedded secure element. Secure firmware updates require external secure elements or software-based checksum validation - unlike STM32L4/L5 or STM32H7 series which integrate these features.

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

Yes, but with limitations: the DAC output can source/sink up to ±5 mA per channel (per Section 6.3.17), supporting resistive loads down to 600 Ω. For capacitive loads > 100 pF or precision applications, an external op-amp buffer is required to maintain linearity and settling time specs (typ. 10 µs).

Is SWD debug supported with standard ST-LINK tools?

Yes. STM32F051K6U7TR fully supports Serial Wire Debug (SWD) using ST-LINK/V2, ST-LINK/V2-1, or ST-LINK/V3. Pin mapping uses SWCLK (PA14) and SWDIO (PA13); no additional configuration is needed beyond enabling SWD in the SYSCFG register during initialization.