STMicroelectronics STM32F334C6T7

Overview

STM32F334C6T7 from STMicroelectronics is an Arm® Cortex®-M4 32-bit MCU with FPU, delivering 72 MHz max CPU frequency, 64 KB Flash, 16 KB SRAM, and integrated high-resolution timing (217 ps HRTIM1), three 12-bit DACs, and one rail-to-rail op-amp - designed for digital power conversion control in AC/DC and DC/DC converters.

For engineers reviewing the STM32F334C6T7 datasheet, STM32F334C6T7 pinout, STM32F334C6T7 application, or STM32F334C6T7 equivalent, key selection criteria include HRTIM resolution for PWM dead-time precision, analog peripheral supply compatibility (2.4–3.6 V for DAC/op-amp), and LQFP48 package I/O count (37 GPIOs) for multi-phase gate driver interfacing.

Technical Context

The STM32F334C6T7 integrates a dedicated 217 ps resolution High-Resolution Timer (HRTIM1) with six 16-bit counters, ten PWM outputs, five fault inputs, and synchronous event handling - enabling sub-nanosecond timing control for resonant LLC and SiC/GaN gate driving. Its analog subsystem includes three independent 12-bit DACs (2.4–3.6 V analog supply), one programmable-gain op-amp (PGA mode), and three ultra-fast comparators (2–3.6 V supply), all sharing a common analog reference domain.

It supports dual-domain clocking: a 4–32 MHz external crystal for precise system timing and internal 8 MHz RC (PLL-locked to 72 MHz), with separate VDDA (2.0–3.6 V) and VREF+ (2.4–3.6 V) rails ensuring ADC/DAC/op-amp accuracy. The interconnect matrix enables concurrent peripheral access without bus contention, critical for real-time power loop execution.

Key Specifications

Pinout & Package

LQFP48 package (7 × 7 mm, 0.5 mm pitch), ECOPACK®2 compliant, with 48 terminals including 37 general-purpose I/Os, 5 V-tolerant pins, and dedicated analog/digital power domains (VDD/VDDA/VSS/VSSA).

Key Features

Applications

Equivalent & Alternatives

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

Compared with STM32F334C6T7, the R6T6 offers scalability for complex I/O needs but increases board space, while the G431KB6 delivers higher compute throughput and advanced security at the cost of analog integration - making the C6T7 optimal for cost-sensitive, analog-rich digital power designs.

Availability

STM32F334C6T7 is available at Aetrix Electronics and suitable for AC/DC server PSUs, industrial DC/DC converters, solar microinverters, and GaN-based battery chargers requiring stable component supply across multi-year production cycles.

Supply support for STM32F334C6T7 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 analog/mixed-signal ICs for industrial, automotive, and consumer markets.

The STM32F3 series targets cost-optimized digital power conversion and motor control, emphasizing high-resolution timing, integrated analog peripherals, and real-time determinism - directly addressing design challenges in switched-mode power supplies and precision actuation.

FAQ

What is the maximum operating temperature range for STM32F334C6T7?

The STM32F334C6T7 is rated for industrial temperature range: –40 °C to +85 °C ambient. This is confirmed in Section 6.3.1 of DS9994 Rev 9, with thermal derating applied above 70 °C per Table 18 (thermal characteristics). No extended temperature grade (–40 °C to +105 °C) is offered for this specific part number.

Does STM32F334C6T7 support hardware CRC calculation?

Yes, it includes a dedicated cyclic redundancy check (CRC) calculation unit compliant with IEEE-802.3, supporting 7/8/16/32-bit polynomials. This is documented in Section 3.3 of DS9994 Rev 9 and used for firmware image integrity verification and communication frame checksumming without CPU overhead.

Can the op-amp in STM32F334C6T7 be configured as a transimpedance amplifier?

Yes - the integrated op-amp supports inverting configuration with external feedback resistor, enabling transimpedance operation for photodiode or shunt current sensing. Pin PA1 (VINP), PA4 (VINN), and PA5 (VOUT) provide full terminal access, as specified in Section 3.12 and Table 13 of DS9994 Rev 9.

Is the HRTIM1 peripheral accessible in low-power Stop mode?

No - HRTIM1 is disabled in Stop mode. Only RTC, independent watchdog, and certain wake-up sources remain active. HRTIM1 requires the APB2 clock domain, which is gated during Stop. Wake-up must occur first (e.g., via EXTI or RTC alarm), then HRTIM1 is reinitialized in Run mode, as detailed in Section 3.4.4 and Table 34 of DS9994 Rev 9.