STMicroelectronics STM32F301K8U7

Overview

STM32F301K8U7 from STMicroelectronics is an Arm® Cortex®-M4 32-bit microcontroller with FPU, 64 KB Flash, 16 KB SRAM, integrated 12-bit DAC, three rail-to-rail comparators, and one programmable-gain operational amplifier. It operates from 2.0–3.6 V, supports up to 72 MHz CPU frequency, and includes capacitive touch sensing for human interface applications.

For engineers reviewing the STM32F301K8U7 datasheet, STM32F301K8U7 pinout, STM32F301K8U7 application, or STM32F301K8U7 equivalent, key selection criteria include analog peripheral supply ranges (VDDA: 2.4–3.6 V for DAC/OPAMP; 2.0–3.6 V for COMP/ADC), 32-pin UFQFPN package footprint, and integrated analog signal chain capability for sensor conditioning and closed-loop control.

Technical Context

The STM32F301K8U7 implements a tightly coupled analog subsystem: its single OPAMP supports PGA mode with all terminals accessible, enabling gain configuration without external components; three ultra-fast comparators feature independent hysteresis and window mode, suitable for overvoltage/undervoltage monitoring. The 12-bit DAC provides monotonic output with ±1 LSB INL across 0–3.3 V range when VDDA ≥ 2.4 V.

Its digital architecture features an interconnect matrix for concurrent peripheral access, 7-channel DMA supporting ADC/DAC/SPI/I²C/USART transfers, and a 32-bit timer with quadrature encoder input-critical for motor position feedback. The device boots from system memory, embedded Flash, or SRAM, with dual-clock-domain USART supporting ISO 7816 smartcard interface.

Key Specifications

Pinout & Package

STM32F301K8U7 uses the UFQFPN32 (5 × 5 mm, 0.5 mm pitch) package with 32 pins. This compact, thermally enhanced package supports reflow soldering and is optimized for high-density PCB layouts in portable and space-limited industrial modules.

Key Features

Applications

Equivalent & Alternatives

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

Compared with STM32F301K8U7, STM32F072CBT6 trades analog integration for lower unit cost and simpler toolchain support, while STM32G431KB6 delivers higher analog channel density and computational headroom at the expense of increased power and PCB footprint.

Availability

STM32F301K8U7 is available at Aetrix Electronics and suitable for motor control interfaces, industrial sensor nodes, human-machine interfaces, and power supply monitors requiring stable component supply across extended production lifecycles.

Supply support for STM32F301K8U7 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, and automotive semiconductors.

The STM32F3 series targets cost-sensitive, analog-intensive embedded applications-specifically engineered to integrate precision analog peripherals (OPAMP, COMP, DAC, ADC) with Cortex-M4 compute capability in compact packages for industrial and consumer HMI systems.

FAQ

What is the maximum operating frequency of the STM32F301K8U7?

The STM32F301K8U7 achieves a maximum CPU clock frequency of 72 MHz using its internal PLL, which accepts input from the 4–32 MHz HSE crystal oscillator or the 8 MHz HSI RC oscillator. At this speed, it delivers 1.25 DMIPS/MHz performance with single-cycle multiply and hardware divide instructions.

Does the STM32F301K8U7 support USB connectivity?

No, the STM32F301K8U7 does not include a USB peripheral. It provides three I²C interfaces, up to three USARTs (one with ISO 7816 support), and two SPI/I²S interfaces-but lacks USB Device or OTG controllers. For USB-based designs, consider STM32F303 or STM32G4 series variants.

Can the OPAMP in the STM32F301K8U7 be used in transimpedance configuration?

Yes, the integrated OPAMP supports transimpedance amplifier (TIA) configurations: its inverting input (PA4), non-inverting input (PA1), and output (PA7) are all externally accessible, allowing connection of photodiode and feedback resistor. The device's rail-to-rail output and 10 MHz gain-bandwidth product support bandwidths up to ~1 MHz with typical 1 MΩ feedback.

What debug interfaces are supported by the STM32F301K8U7?

The STM32F301K8U7 supports Serial Wire Debug (SWD) and JTAG via its SWJ-DP (Serial Wire JTAG Debug Port). SWD uses only two pins (SWDIO and SWCLK) and is recommended for production programming and debugging; JTAG requires five pins and is typically used during early development for boundary scan testing.