STMicroelectronics STM32F334K8U6

Overview

STM32F334K8U6 from STMicroelectronics is an Arm® Cortex®-M4 32-bit MCU with FPU, 64 KB Flash, 16 KB SRAM, and integrated high-resolution timer (HRTIM1) delivering 217 ps timing resolution. It integrates three 12-bit DACs, two ADCs (0.20 µs conversion), three rail-to-rail comparators, one programmable-gain operational amplifier, and CAN 2.0B interface - deployed in digital power supplies and motor control systems requiring precise PWM synchronization and analog signal conditioning.

For engineers reviewing the STM32F334K8U6 datasheet, STM32F334K8U6 pinout, STM32F334K8U6 application, or STM32F334K8U6 equivalent, key selection criteria include HRTIM1 sub-nanosecond resolution, dual ADC simultaneous sampling capability, VDDA/VREFINT stability across 2.0–3.6 V analog supply range, and UFQFPN32 package compatibility with space-constrained power electronics layouts.

Technical Context

The STM32F334K8U6 implements a tightly coupled Arm Cortex-M4 core with hardware FPU and DSP extensions, enabling real-time execution of complex control algorithms such as field-oriented control (FOC) and resonant LLC modulation. Its HRTIM1 subsystem features six 16-bit counters, five fault inputs, and synchronous event chaining - supporting multi-phase interleaved topologies with cycle-by-cycle protection.

Analog integration includes independent VDDA-supplied domains for ADCs (2.0–3.6 V), DACs (2.4–3.6 V), comparators (2.0–3.6 V), and OPAMP (2.4–3.6 V), allowing mixed-signal co-design without shared noise coupling. The embedded CCM-SRAM (4 KB) provides zero-wait-state instruction/data access critical for deterministic interrupt latency in hard real-time loops.

Key Specifications

Pinout & Package

STM32F334K8U6 is housed in a 32-pin UFQFPN package (5 × 5 mm, 0.5 mm pitch), optimized for thermal performance and PCB area efficiency in power-conversion modules. Pin layout supports full GPIO remapping, 5 V-tolerant digital I/Os, and dedicated analog input/output routing with separate VDDA/VSSA pins.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar high-resolution timing and mixed-signal control applications.

Compared with STM32F334K8U6, STM32F303K8U6 omits critical high-resolution timing and analog resources needed for digital power, while STM32G431KB6U6 retains full HRTIM functionality with expanded memory and speed - making it the only viable upgrade path for performance-scaling designs.

Availability

STM32F334K8U6 is available at Aetrix Electronics and suitable for digital power supplies, motor inverters, industrial CAN nodes, and programmable power sources requiring stable component supply and long-term production continuity.

Supply support for STM32F334K8U6 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, specializing in microcontrollers, power management, sensors, and automotive ICs with strong industrial and energy infrastructure focus.

The STM32F3 series targets cost-sensitive, analog-rich embedded control applications - designed specifically for digital power conversion, motor control, and capacitive touch interfaces where precision timing and integrated signal conditioning reduce system complexity.

FAQ

What is the maximum operating frequency of the STM32F334K8U6 CPU?

The STM32F334K8U6 features an Arm Cortex-M4 core with FPU, rated for a maximum clock frequency of 72 MHz. This is achieved using the internal PLL driven by the 8 MHz HSI oscillator or an external crystal (4–32 MHz). All peripherals remain fully functional at this speed, and flash wait states are automatically managed by the ART Accelerator.

Does the STM32F334K8U6 support USB device functionality?

No, the STM32F334K8U6 does not include a USB peripheral. Although pins PA11 and PA12 are physically present in the UFQFPN32 package, they are marked as No Connect (NC) in this specific part number's configuration. USB capability is available only in higher-density variants (e.g., STM32F334R8) with compatible pinouts and silicon enablement.

What analog supply voltage ranges are required for the DAC and OPAMP?

The DAC channels require VDDA in the range of 2.4 V to 3.6 V, while the operational amplifier also operates within 2.4 V to 3.6 V. These tighter lower bounds (vs. the 2.0 V minimum for ADCs/comparators) ensure monotonicity and linearity across the full 12-bit DAC output range and stable gain accuracy in PGA mode.

How many independent PWM outputs does the HRTIM1 provide on the STM32F334K8U6?

HRTIM1 provides 10 independent PWM outputs (CH1–CH6 on Timer A–F, plus complementary outputs), configurable as 5 pairs of complementary signals with programmable deadtime insertion. All 10 outputs are accessible on the UFQFPN32 package via dedicated pins (e.g., PA1–PA7, PB0–PB1), enabling full control of a 3-phase inverter with braking and auxiliary functions.