STMicroelectronics STM32F334C8T6

Overview

STM32F334C8T6 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 op-amp, and capacitive touch sensing - designed for precision digital power control in switched-mode power supplies (SMPS) and motor drives.

For engineers reviewing the STM32F334C8T6 datasheet, STM32F334C8T6 pinout, STM32F334C8T6 application, or STM32F334C8T6 equivalent, key selection criteria include HRTIM1 sub-nanosecond PWM timing, analog peripheral integration (DAC/ADC/COMP/OPAMP), 5 V-tolerant I/O support, and CAN 2.0B interface for industrial feedback loop systems.

Technical Context

The device implements a tightly coupled Arm Cortex-M4 core with hardware FPU and DSP extensions, operating up to 72 MHz with single-cycle multiply and HW divide. Its analog subsystem features independent voltage domains: VDDA (2.0–3.6 V) for ADCs/comparators, and dedicated 2.4–3.6 V analog supply for DACs and OPAMP.

HRTIM1 provides six 16-bit counters with synchronized PWM generation, five fault inputs, ten external event triggers, and hardware deadtime insertion - enabling real-time, cycle-by-cycle protection in resonant LLC or SiC/GaN-based power converters without CPU intervention.

Key Specifications

Pinout & Package

LQFP48 package with exposed thermal pad (EP), RoHS-compliant ECOPACK®2, 0.5 mm pitch, 7 × 7 mm body size. Designed for reflow soldering and thermal management in high-density power applications.

Key Features

Applications

Equivalent & Alternatives

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

Compared with STM32F334C8T6, the STM32F303RET6 trades analog integration and HRTIM precision for USB and memory headroom, while the STM32G474RET6 delivers superior timing resolution and ADC performance at the cost of increased BOM complexity for analog signal conditioning.

Availability

STM32F334C8T6 is available at Aetrix Electronics and suitable for switched-mode power supplies, motor drives, industrial battery chargers, and programmable power supplies requiring stable component supply and long-term industrial lifecycle support.

Supply support for STM32F334C8T6 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, sensors, and automotive ICs.

The STM32F3 series targets cost-sensitive, analog-intensive embedded applications - specifically engineered for digital power conversion, motor control, and human-machine interface systems requiring mixed-signal integration and deterministic real-time response.

FAQ

What is the maximum operating frequency of the STM32F334C8T6?

The STM32F334C8T6 operates at a maximum CPU frequency of 72 MHz using its internal PLL, derived from either the 8 MHz HSI oscillator or an external 4–32 MHz crystal. This frequency is sustained across the full industrial temperature range (–40°C to +85°C) under 2.0–3.6 V supply conditions, with all peripherals fully functional and timing specifications guaranteed per DS9994 Rev 9.

Does the STM32F334C8T6 support hardware-based fault protection in power applications?

Yes - the HRTIM1 peripheral includes five dedicated fault inputs with configurable polarity and filter, enabling hardware-level shutdown of PWM outputs within <100 ns of fault detection. Fault actions include forced idle state, emergency stop, or blanking, all executed without CPU involvement, meeting IEC 62368-1 functional safety requirements for power stage protection.

Can the integrated op-amp be used for current sensing in shunt-based topologies?

Yes - the single rail-to-rail op-amp supports programmable gain (1–100) in PGA mode with all terminals accessible. When configured with external resistors, it achieves ±0.5% gain accuracy and 100 kHz bandwidth, directly interfacing with shunt resistors and feeding into ADC inputs - validated in ST application note AN4915 for 3-phase motor current sensing.

Is the STM32F334C8T6 pin-compatible with other STM32F334 variants?

No - the STM32F334C8T6 in LQFP48 is not pin-compatible with LQFP32, LQFP64, UFQFPN32, or WLCSP49 variants of the same family. Pin mapping differs significantly across packages due to varying GPIO counts and peripheral routing constraints; migration requires PCB redesign and firmware adaptation per ST's package-specific pinout tables in Section 4 of DS9994.