STMicroelectronics STM32F301K6U6TR

Overview

STM32F301K6U6TR from STMicroelectronics is a 32-bit Arm® Cortex®-M4 microcontroller with FPU, 32 KB Flash, 16 KB SRAM, and integrated analog peripherals including 12-bit DAC, rail-to-rail comparators, operational amplifier, and 12-bit ADC (0.20 μs conversion). It operates from 2.0–3.6 V and supports capacitive touch sensing for human interface applications.

For engineers reviewing the STM32F301K6U6TR datasheet, STM32F301K6U6TR pinout, STM32F301K6U6TR application, or STM32F301K6U6TR equivalent, this MCU is selected for mixed-signal embedded control where precision analog front-end integration, low-power operation, and real-time signal processing are required - especially in motor control feedback loops, sensor fusion nodes, and industrial HMI subsystems.

Technical Context

The device implements a tightly coupled Cortex-M4 core with single-cycle multiply and hardware divide, enabling deterministic DSP operations at up to 72 MHz. Its interconnect matrix routes DMA transfers between 7 channels and peripherals including ADC, DAC, timers, SPI, I²C, and USART without CPU intervention.

Analog subsystem integration includes one 12-bit DAC channel (2.4–3.6 V analog supply), three ultra-fast comparators (2.0–3.6 V), one programmable-gain op-amp with all terminals accessible, and a 12-bit ADC with selectable resolution (6/8/10/12 bits) and differential input capability - all sharing independent analog supply domains for noise isolation.

Key Specifications

Pinout & Package

STM32F301K6U6TR uses the UFQFPN32 (5 × 5 mm, 0.5 mm pitch) package with 32 pins and exposed thermal pad. Pin functions support flexible peripheral remapping via alternate function registers.

Key Features

Applications

Equivalent & Alternatives

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

Compared with STM32F072CBT6, STM32F301K6U6TR delivers integrated analog signal conditioning and real-time DSP; compared with STM32G431KB6, it offers lower cost and smaller footprint while retaining essential mixed-signal features for entry-level industrial control.

Availability

STM32F301K6U6TR is available at Aetrix Electronics and suitable for motor control subsystems, sensor fusion nodes, industrial HMI panels, and programmable logic controller I/O modules requiring stable component supply and long-term production continuity.

Supply support for STM32F301K6U6TR 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, specializing in microcontrollers, power management, analog, MEMS, and automotive ICs.

This part belongs to the STM32F3-series, designed specifically for cost-sensitive industrial and consumer applications requiring high analog integration, real-time control, and energy efficiency - bridging the gap between basic MCUs and high-end application processors.

FAQ

What is the maximum operating frequency and clock source configuration for STM32F301K6U6TR?

The device runs at up to 72 MHz using its internal 8 MHz RC oscillator multiplied by a PLL, or from an external 4–32 MHz crystal. The PLL supports integer and fractional multiplication; startup time from HSI to 72 MHz is ≤100 μs. All timing-critical peripherals (ADC, DAC, timers) are synchronized to the APB bus derived from this clock tree.

Does STM32F301K6U6TR support hardware-based capacitive touch sensing?

Yes - it integrates a dedicated Touch Sensing Controller (TSC) supporting up to 18 capacitive sensing channels. The TSC provides built-in charge transfer measurement, spread-spectrum modulation, and noise immunity features, enabling robust touchkey, linear slider, and rotary wheel implementations without external ICs or firmware-intensive polling.

What are the analog supply requirements for the DAC, ADC, and op-amp?

The DAC requires VDDA between 2.4 V and 3.6 V; the ADC and comparators operate from 2.0 V to 3.6 V; the op-amp accepts VDDA from 2.4 V to 3.6 V. These ranges are specified in DS9895 Rev 8 Tables 3 and 68–70. Separate VDDA decoupling is mandatory to maintain SNR and offset stability.

Is STM32F301K6U6TR pin-compatible with other STM32F301 variants?

No - the UFQFPN32 package (32-pin) used by STM32F301K6U6TR is not pin-compatible with LQFP32, LQFP48, or WLCSP49 variants of the same family. Pin assignments differ significantly due to reduced I/O count and optimized analog signal routing; migration requires PCB redesign and firmware I/O remapping.