STMicroelectronics STM32F051K6T7TR

Overview

STM32F051K6T7TR from STMicroelectronics is an ARM® Cortex®-M0 32-bit microcontroller with 32 KB Flash, 8 KB SRAM, 48 MHz max CPU frequency, 12-bit ADC (1.0 µs conversion), and single 12-bit DAC - deployed in industrial sensor nodes, motor control interfaces, and smart metering front-ends requiring low-power mixed-signal processing.

For engineers reviewing the STM32F051K6T7TR datasheet, STM32F051K6T7TR pinout, STM32F051K6T7TR application, or STM32F051K6T7TR equivalent, key selection criteria include its 32-pin UFQFPN package, 5 V-tolerant I/O count (up to 27), integrated capacitive touch sensing (18 channels), and dual USART support with LIN/IRDA capability.

Technical Context

The device integrates a single-cycle ARM Cortex-M0 core with hardware parity-protected SRAM and CRC calculation unit, enabling deterministic real-time execution in safety-aware embedded systems. Its clock system combines internal RC oscillators (8 MHz HSI, 40 kHz LSI) with external crystal support (4–32 MHz HSE, 32.768 kHz LSE) and a programmable PLL for precise peripheral timing.

Power architecture supports three low-power modes (Sleep, Stop, Standby) with RTC backup via VBAT, while analog subsystem includes dedicated VDDA supply (2.4–3.6 V), temperature sensor, and internal voltage reference (VREFINT) for self-calibrated ADC/DAC operation.

Key Specifications

Pinout & Package

STM32F051K6T7TR uses a 32-pin Ultra-Fine Pitch Quad Flat No-lead (UFQFPN) package, 5 × 5 mm body, 0.5 mm pitch, exposed thermal pad - optimized for compact industrial PCBs with high thermal dissipation requirements.

Key Features

Applications

Equivalent & Alternatives

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

Compared with STM32F030F4P6 and STM32F070F6P6, the STM32F051K6T7TR uniquely delivers integrated DAC, capacitive touch, and advanced timer features in a 32-pin footprint - making it optimal for mixed-signal edge controllers where analog interface density matters.

Availability

STM32F051K6T7TR is available at Aetrix Electronics and suitable for industrial sensor nodes, smart meter front-ends, BLDC motor control interfaces, and human-machine interfaces requiring stable component supply across long-lifecycle production programs.

Supply support for STM32F051K6T7TR 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, sensors, and automotive-grade components since 1987.

The STM32F0 series targets cost-sensitive, low-power embedded applications requiring ARM Cortex-M0 performance with rich analog and timing peripherals - specifically engineered for industrial automation, appliance control, and IoT edge nodes.

FAQ

What is the maximum operating temperature range for STM32F051K6T7TR?

The STM32F051K6T7TR 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), where ambient operating conditions specify TA = –40 to 85 °C under VDD = 2.0–3.6 V. Thermal derating begins above 70 °C per junction-to-ambient thermal resistance (θJA = 150 °C/W for UFQFPN32).

Does STM32F051K6T7TR support in-application programming (IAP)?

Yes, STM32F051K6T7TR supports IAP via its system memory bootloader, accessible through USART1 using the ST proprietary protocol. The device allows reprogramming Flash memory while running user code, provided RDP Level 1 is active and memory write protection is disabled - verified in Section 3.3 (Boot modes) and AN2606 application note.

How many I²C interfaces does STM32F051K6T7TR have, and what are their speed capabilities?

It has two I²C interfaces: I2C1 and I2C2. I2C1 supports Fast Mode Plus (1 Mbit/s) with 20 mA current sink, SMBus/PMBus, and wakeup from Stop mode. I2C2 operates in standard (100 kbit/s) and fast (400 kbit/s) modes only - detailed in Table 9 and Section 3.16 of the datasheet.

Is the DAC output buffered, and can it drive a 10 kΩ load directly?

The integrated 12-bit DAC has an unbuffered output stage. Driving a 10 kΩ load directly causes gain error >1% due to output impedance (~15 kΩ typical). ST recommends using an external op-amp buffer (e.g., TSZ121) for precision applications - specified in Section 6.3.17 (DAC electrical specifications) and Figure 125 of the datasheet.