STMicroelectronics STM32F301K6U7

Overview

STM32F301K6U7 from STMicroelectronics is an Arm® Cortex®-M4 32-bit microcontroller with FPU, 32 KB Flash, 16 KB SRAM, and integrated analog peripherals including a 12-bit DAC, three rail-to-rail comparators, one operational amplifier (PGA-capable), and a 12-bit ADC with 0.20 μs conversion time. It operates from 2.0–3.6 V and targets sensor signal conditioning and motor control in compact industrial edge nodes.

For engineers reviewing the STM32F301K6U7 datasheet, STM32F301K6U7 pinout, STM32F301K6U7 application, or STM32F301K6U7 equivalent, key selection criteria include its 32-pin UFQFPN package, 72 MHz CPU clock, analog supply flexibility (VDDA 2.0–3.6 V, VREF+ 2.4–3.6 V), and embedded capacitive touch sensing for HMI interfaces.

Technical Context

The STM32F301K6U7 implements a tightly coupled Cortex-M4 core with single-cycle MAC and hardware divide, paired with a dedicated interconnect matrix enabling concurrent access to Flash, SRAM, and peripherals without bus contention. Its analog subsystem integrates independent voltage domains: VDDA powers ADC/DAC/COMP/OPAMP, while VREF+ supplies the DAC reference and OPAMP non-inverting input.

Timing architecture includes dual clock domains - a 72 MHz APB2 domain for high-speed peripherals (ADC, TIM1) and a 36 MHz APB1 domain for I²C/USART/SPI - with programmable prescalers and PLL-based clock synthesis from internal 8 MHz RC or external 4–32 MHz crystal.

Key Specifications

Pinout & Package

STM32F301K6U7 uses the UFQFPN32 (5 × 5 mm) package with 32 pins, 0.5 mm pitch, and exposed thermal pad. Pin functions are defined per ST's DS9895 Rev 8, Section 4.

Key Features

Applications

Equivalent & Alternatives

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

Compared with STM32F301K6U7, the STM32F072CBT6 sacrifices analog integration and DSP capability for lower cost, while the STM32F303K8U7 extends functionality with USB and larger memory at the expense of DAC reference flexibility - making the K6U7 optimal for analog-intensive, space-constrained edge nodes without USB.

Availability

STM32F301K6U7 is available at Aetrix Electronics and suitable for industrial motor drives, sensor signal conditioning modules, capacitive touch HMIs, and programmable power monitors requiring stable component supply across extended production lifecycles.

Supply support for STM32F301K6U7 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 STM32F3 series targets cost-sensitive, analog-rich embedded applications - combining high-precision analog peripherals with Cortex-M4 performance to replace multi-chip solutions in motor control, sensing, and human-machine interfaces.

FAQ

What is the maximum operating frequency of the STM32F301K6U7?

The STM32F301K6U7 achieves a maximum CPU clock frequency of 72 MHz using its internal PLL, which can be configured with HSI (8 MHz) or HSE (4–32 MHz) as input. This frequency is sustained across the full industrial temperature range (–40°C to +85°C) under 2.0–3.6 V supply conditions, as validated in DS9895 Rev 8 Section 6.3.9.

Does the STM32F301K6U7 support hardware-accelerated floating-point operations?

Yes, the STM32F301K6U7 integrates an Arm Cortex-M4 core with a single-precision floating-point unit (FPU), enabling IEEE 754-compliant FP32 arithmetic in hardware. This accelerates mathematical operations used in motor control algorithms (e.g., Clarke/Park transforms) and sensor fusion without software emulation overhead.

Can the operational amplifier be used in instrumentation amplifier configuration?

No - the single OPAMP in the STM32F301K6U7 supports only non-inverting, inverting, and programmable-gain amplifier (PGA) modes with fixed internal resistors. It lacks the matched resistor pairs and third input required for true 3-op-amp instrumentation amplifier topology; external components are needed for that function.

What is the minimum supply voltage for reliable ADC operation?

The ADC requires VDDA ≥ 2.0 V and VREF+ ≥ 2.4 V for full 12-bit linearity and specified accuracy (±1 LSB INL). Operation below 2.4 V on VREF+ degrades DAC and OPAMP performance but does not prevent ADC sampling; however, datasheet-specified accuracy is only guaranteed when both VDDA and VREF+ meet their respective minima.