STMicroelectronics STM32F301K6U6

Overview

STM32F301K6U6 from STMicroelectronics is a 32-bit Arm® Cortex®-M4 MCU 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, motor control feedback loops, and compact industrial HMI front-ends.

For engineers reviewing the STM32F301K6U6 datasheet, STM32F301K6U6 pinout, STM32F301K6U6 application, or STM32F301K6U6 equivalent, key selection criteria include its 32-pin UFQFPN package, 72 MHz CPU clock, analog supply flexibility (VDDA 2.4–3.6 V for DAC/OPAMP, 2.0–3.6 V for ADC/COMP), and capacitive touch support across 18 channels.

Technical Context

The STM32F301K6U6 implements a tightly coupled Cortex-M4 core with single-cycle multiply and hardware divide, paired with an interconnect matrix enabling concurrent access to Flash, SRAM, and peripherals. Its analog subsystem integrates independent voltage domains: VDDA powers the 12-bit DAC (2.4–3.6 V), OPAMP (2.4–3.6 V), and COMP (2.0–3.6 V), while the 12-bit ADC supports selectable resolution (6/8/10/12 bits) and differential mode over 0–3.6 V full scale.

Timing architecture includes four clock sources-HSE (4–32 MHz), LSE (32.768 kHz), HSI (8 MHz RC with PLL), and LSI (40 kHz)-feeding a programmable prescaler tree. The 9-timer suite features TIM1 (advanced-control, 6-channel PWM + deadtime), TIM2/TIM15–TIM17 (general-purpose with IC/OC/PWM), and TIM6 (DAC trigger), all synchronized via APB bus matrix.

Key Specifications

Pinout & Package

STM32F301K6U6 uses the UFQFPN32 (5 × 5 mm, 0.5 mm pitch) package with 32 pins, optimized for compact PCB layouts in industrial and consumer edge nodes. Thermal pad on underside improves power dissipation during sustained analog operation.

Key Features

Applications

Equivalent & Alternatives

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

Compared with STM32F072CBT6, the STM32F301K6U6 delivers FPU-accelerated math and full analog front-end for sensor-rich edge nodes; versus STM32G431KB6, it trades higher clock speed and memory for lower cost and smaller footprint in cost-sensitive volume applications.

Availability

STM32F301K6U6 is available at Aetrix Electronics and suitable for motor control feedback, sensor signal conditioning, and capacitive touch HMI requiring stable component supply across industrial OEM production cycles.

Supply support for STM32F301K6U6 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-intensive applications where precision signal acquisition, real-time control, and compact form factor are critical-exemplified by the F301's integrated OPAMP, DAC, and comparator suite.

FAQ

What is the maximum operating frequency of the STM32F301K6U6?

The STM32F301K6U6 achieves a maximum CPU clock frequency of 72 MHz using its internal 8 MHz HSI oscillator with PLL multiplication or an external crystal up to 32 MHz. This frequency is sustained across the full industrial temperature range (–40 to +85 °C) under 2.0–3.6 V supply conditions, as validated in Section 6.3.9 of the DS9895 datasheet.

Does the STM32F301K6U6 support hardware-accelerated cryptographic functions?

No, the STM32F301K6U6 does not include dedicated cryptographic accelerators (e.g., AES, SHA, PKA). It relies on software libraries for encryption tasks. For hardware crypto, ST recommends the STM32L4 or STM32H7 series, which integrate AES-128/256 engines and true random number generators compliant with NIST SP800-90B.

Can the integrated op-amp be used in transimpedance configuration?

Yes, the single rail-to-rail op-amp supports transimpedance amplifier (TIA) configurations. Its inverting input (PA1), non-inverting input (PA2), and output (PA3) are fully accessible, and the device datasheet (Section 3.13) confirms compatibility with photodiode current-to-voltage conversion when biased within the 2.4–3.6 V analog supply range and loaded ≤100 kΩ.

What debug interfaces are supported, and are they available in the UFQFPN32 package?

The STM32F301K6U6 supports Serial Wire Debug (SWD) via SWCLK (PA14) and SWDIO (PA13), both exposed on pins 29 and 30 of the UFQFPN32 package. JTAG is also supported but requires five pins (TMS, TCK, TDI, TDO, TRST), which are not all routed in this 32-pin variant-SWD is the recommended and fully functional debug interface for this package.