STMicroelectronics STM32F334R8T6

Overview

STM32F334R8T6 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 HRTIM), three 12-bit DACs, and one rail-to-rail op-amp - designed for digital power control, motor drive, and precision analog signal conditioning in industrial inverters and UPS systems.

For engineers reviewing the STM32F334R8T6 datasheet, STM32F334R8T6 pinout, STM32F334R8T6 application, or STM32F334R8T6 equivalent, key selection criteria include HRTIM resolution for PWM dead-time control, DAC/ADC co-sampling capability for closed-loop feedback, op-amp PGA mode for sensor front-end gain, and CAN 2.0B interface for system-level communication in real-time power electronics.

Technical Context

The device integrates a dual-ADC architecture supporting simultaneous sampling at 2.4 MSPS with selectable 12/10/8/6-bit resolution and differential input mode, enabling precise current/voltage sensing in three-phase motor drives. Its HRTIM1 block provides six 16-bit counters with 217 ps timing resolution, five fault inputs, and synchronous PWM output coordination - critical for interleaved DC-DC converters and resonant LLC topologies.

On-chip analog resources include three ultra-fast comparators (15 ns propagation delay), one programmable-gain op-amp (PGA) with external resistor network support, and 18 capacitive sensing channels - all sharing a dedicated 2.4–3.6 V analog supply domain to ensure noise isolation from digital switching transients.

Key Specifications

Pinout & Package

LQFP64 (10 × 10 mm, 0.5 mm pitch) package with 51 fast I/Os - all mappable to external interrupt vectors and up to 21 pins 5 V-tolerant for mixed-voltage system interfacing.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar high-resolution timing and analog integration applications.

Compared with STM32F334R8T6, STM32F303RET6 trades HRTIM and analog integration for memory headroom, while STM32G474RET6 extends resolution and precision at higher cost - making the F334 optimal for cost-sensitive, high-timing-accuracy industrial power control where 217 ps resolution is non-negotiable.

Availability

STM32F334R8T6 is available at Aetrix Electronics and suitable for industrial motor drives, uninterruptible power supplies, programmable DC power supplies, and industrial touch HMI requiring stable component supply across long-lifecycle manufacturing programs.

Supply support for STM32F334R8T6 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, power management ICs, sensors, and automotive semiconductors since 1987.

The STM32F3-series targets cost-optimized, analog-rich embedded control - specifically engineered for digital power conversion, motor control, and precision measurement applications demanding integrated high-resolution timers and mixed-signal peripherals.

FAQ

What is the maximum operating frequency of the STM32F334R8T6's CPU core?

The STM32F334R8T6 features an Arm Cortex-M4 core with FPU, rated for a maximum CPU frequency of 72 MHz under specified VDD (2.0–3.6 V) and ambient temperature (–40 to +85 °C) conditions. This frequency is achieved using the internal PLL with HSE or HSI clock sources, and is validated per DS9994 Rev 9 Section 6.3.9.

Does the STM32F334R8T6 support hardware-accelerated cryptographic operations?

No, the STM32F334R8T6 does not include a dedicated cryptographic accelerator or hardware AES/SHA engine. It relies on software libraries (e.g., STM32CubeF3 HAL + Mbed TLS) for encryption tasks. Cryptographic acceleration is introduced in later families such as STM32L4+, G0, and H7 series.

Can the integrated op-amp be used in transimpedance configuration for photodiode signal conditioning?

Yes - the single rail-to-rail op-amp supports PGA mode with configurable gain (1× to 16×) and fully accessible terminals (non-inverting input, inverting input, output). When biased with VDDA = 3.3 V and using external feedback resistors, it achieves <10 nV/√Hz input noise density and 10 MHz GBW - suitable for low-speed photodiode current-to-voltage conversion in industrial light-sensing applications.

What debug interfaces are supported, and is SWD sufficient for full development?

The STM32F334R8T6 supports Serial Wire Debug (SWD) and JTAG via the SWJ-DP interface. SWD is fully sufficient for all development tasks - including flash programming, real-time variable inspection, breakpoint setting, and trace (via ITM) - and uses only two pins (SWCLK, SWDIO), making it ideal for space-constrained LQFP64 layouts.