STMicroelectronics STM32F334C4T6

Overview

STM32F334C4T6 from STMicroelectronics is an Arm® Cortex®-M4 32-bit MCU with FPU, delivering 72 MHz max CPU frequency, 32 KB Flash, 12 KB SRAM (with HW parity), and integrated high-resolution timer (HRTIM1) with 217 ps resolution. It integrates three 12-bit DACs, three rail-to-rail comparators, one programmable-gain operational amplifier, two ADCs (12/10/8/6-bit selectable), and CAN 2.0B interface - designed for precision digital power control in AC/DC and DC/DC converters.

For engineers reviewing the STM32F334C4T6 datasheet, STM32F334C4T6 pinout, STM32F334C4T6 application, or STM32F334C4T6 equivalent, key selection criteria include HRTIM timing precision for synchronous rectification, analog peripheral supply range (2.4–3.6 V for DAC/OPAMP), 5 V-tolerant I/O mapping, and LQFP48 package compatibility with industrial motor control and SMPS reference designs.

Technical Context

The device implements a tightly coupled Cortex-M4 core with single-cycle multiply and hardware divide, supporting DSP instructions for real-time control loops. Its analog subsystem includes independent VDDA/VREFINT domains, enabling simultaneous high-speed ADC sampling (0.20 µs) and DAC output with rail-to-rail comparators for fast overvoltage/overcurrent protection.

HRTIM1 provides six 16-bit counters synchronized to sub-nanosecond resolution, with five fault inputs, ten external event triggers, and dedicated deadtime generation - enabling precise interleaved PWM control for multi-phase power topologies without software intervention.

Key Specifications

Pinout & Package

LQFP48 (7 × 7 mm, 0.5 mm pitch), ECOPACK®2-compliant, with exposed thermal pad for enhanced power dissipation in continuous-duty power applications.

Key Features

Applications

Equivalent & Alternatives

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

Compared with STM32F334C4T6, the R6T6 offers expanded memory and I/O for multi-channel systems, while the G431KB6 delivers superior compute density and hardware-accelerated motor control - making the C4T6 optimal for cost-sensitive, single-stage digital power where analog integration and HRTIM precision are prioritized over raw memory size.

Availability

STM32F334C4T6 is available at Aetrix Electronics and suitable for AC/DC power supplies, DC/DC converters, motor gate drivers, and industrial human-machine interfaces requiring stable component supply and long-term production continuity.

Supply support for STM32F334C4T6 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, analog ICs, MEMS, and power devices for industrial, automotive, and consumer markets.

The STM32F3 series targets cost-optimized digital power conversion and analog-intensive embedded control, emphasizing high-precision timing, integrated analog peripherals, and real-time determinism for switch-mode power supply and motor drive applications.

FAQ

What is the maximum operating temperature range for STM32F334C4T6?

The STM32F334C4T6 is rated for industrial temperature operation from –40 °C to +105 °C, validated per JEDEC JESD22-A104. This range supports deployment in enclosed power enclosures with limited airflow and ambient temperatures exceeding 85 °C, provided PCB thermal design meets the 35 °C/W junction-to-ambient spec for LQFP48.

Does STM32F334C4T6 support hardware-based deadtime insertion for PWM outputs?

Yes - the HRTIM1 peripheral provides fully configurable hardware deadtime insertion (1–255 ns steps) on all six complementary PWM outputs, with automatic fault-triggered disable and synchronous update across all timers. This eliminates software overhead and jitter in gate driver timing, critical for preventing shoot-through in half-bridge configurations.

Can the internal opamp be used in transimpedance configuration for current-sense amplification?

Yes - the single rail-to-rail opamp supports PGA mode with gains of 2×, 4×, 8×, or 100×, and its terminals (non-inverting input, inverting input, output) are fully accessible on dedicated pins (PA7, PB0, PB1). When combined with an external feedback resistor, it functions as a precision transimpedance amplifier for shunt-based current measurement with <1% gain error over temperature.

Is the CAN interface compatible with ISO 11898-2 physical layer requirements?

No - the integrated CAN 2.0B controller is a protocol-layer IP block only; it requires an external CAN transceiver (e.g., TJA1042, SN65HVD230) to meet ISO 11898-2 differential signaling, bus fault tolerance, and ESD immunity requirements. The MCU's CAN peripheral handles message filtering, arbitration, and error handling, but physical layer compliance depends on the selected transceiver and PCB layout.