STMicroelectronics STM32F334K6T6

Overview

STM32F334K6T6 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, three ultra-fast rail-to-rail comparators, one programmable-gain operational amplifier, and two 12-bit ADCs - designed for precision digital power control in AC/DC converters and motor drives.

For engineers reviewing the STM32F334K6T6 datasheet, STM32F334K6T6 pinout, STM32F334K6T6 application, or STM32F334K6T6 equivalent, key selection criteria include HRTIM1 sub-nanosecond PWM capability, analog peripheral supply range (2.4–3.6 V), CAN 2.0B interface support, and LQFP32 package compatibility with space-constrained power control PCB layouts.

Technical Context

The device implements a tightly coupled Arm Cortex-M4 core with hardware FPU and DSP instructions, operating up to 72 MHz with single-cycle multiply and HW divide. Its analog subsystem includes dedicated VDDA/VREF+ supplies (2.4–3.6 V) enabling simultaneous high-speed ADC sampling (0.20 µs), DAC settling, and comparator response without cross-talk.

HRTIM1 provides six independent 16-bit timers with synchronized PWM outputs, five fault inputs, and 10 external event triggers - enabling cycle-by-cycle current limiting and phase-shifted multi-phase topologies in resonant LLC or SiC-based power supplies.

Key Specifications

Pinout & Package

LQFP32 package with exposed thermal pad; 32-pin quad flat pack, 0.8 mm pitch, RoHS-compliant ECOPACK®2 construction.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar digital power control applications.

Compared with STM32F334K6T6, STM32F303K8T6 sacrifices HRTIM and analog density for lower cost, while STM32G431KB6 extends resolution and analog capability within identical packaging - making the G4 variant ideal for next-generation digital power designs demanding higher fidelity control.

Availability

STM32F334K6T6 is available at Aetrix Electronics and suitable for AC/DC power supplies, motor control modules, battery chargers, and programmable DC loads requiring stable component supply and long-term industrial lifecycle support.

Supply support for STM32F334K6T6 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, and automotive-grade ICs with vertical manufacturing and broad industrial certification coverage.

The STM32F3 series targets cost-sensitive, analog-intensive embedded control applications - specifically engineered for digital power conversion, motor control, and sensor signal processing with integrated high-precision analog peripherals.

FAQ

Does STM32F334K6T6 support USB device functionality?

No. The STM32F334K6T6 does not include a USB physical layer (PHY) or USB-specific peripherals. Pin assignments PA11/PA12 are not configured for USB in this variant, as confirmed in DS9994 Rev 9 Table 13. For USB connectivity, designers must select STM32F303 or STM32F373 variants with integrated USB FS PHY.

What is the maximum operating temperature for industrial use?

The STM32F334K6T6 is qualified for industrial temperature range: –40 °C to +85 °C ambient, verified per JEDEC JESD47 stress testing. Thermal derating begins above 70 °C ambient when operating at 72 MHz with all peripherals active; full specification compliance is guaranteed across the full –40 °C to +85 °C range.

Can the HRTIM1 module generate complementary PWM outputs with programmable deadtime?

Yes. HRTIM1 supports hardware-configurable deadtime insertion (down to 12.5 ns steps) between complementary PWM outputs on each timer channel. Deadtime values are stored in dedicated registers and applied automatically during waveform generation - eliminating CPU intervention and ensuring deterministic timing even under interrupt load.

Is the internal 40 kHz RC oscillator accurate enough for RTC operation?

No. The 40 kHz LSI oscillator has ±40% initial tolerance and strong temperature dependence, making it unsuitable for RTC timekeeping. The device requires the 32.768 kHz LSE crystal oscillator (with ±20 ppm accuracy) for calendar RTC functionality, as specified in Section 3.6 and Table 39 of DS9994 Rev 9.