STMicroelectronics STM32F334R8T7

Overview

STM32F334R8T7 from STMicroelectronics is an Arm® Cortex®-M4 32-bit MCU with FPU, 64 KB Flash, 16 KB SRAM, dual 12-bit ADCs (0.20 µs conversion), triple 12-bit DACs, and a 217 ps resolution high-resolution timer (HRTIM1). It integrates three rail-to-rail comparators, one programmable-gain operational amplifier, and supports capacitive touch sensing - deployed in digital power supplies, motor control inverters, and precision analog signal conditioning systems.

For engineers reviewing the STM32F334R8T7 datasheet, STM32F334R8T7 pinout, STM32F334R8T7 application, or STM32F334R8T7 equivalent, key selection criteria include HRTIM timing precision (<220 ps), analog peripheral supply range (2.4–3.6 V for DAC/OPAMP), CAN 2.0B interface support, and LQFP64 package compatibility with industrial thermal and layout constraints.

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 includes independent VDDA-supplied domains for ADC (2.0–3.6 V), DAC/OPAMP/COMP (2.4–3.6 V), enabling simultaneous high-speed conversion and precision signal generation without cross-domain interference.

HRTIM1 provides six 16-bit counters with 217 ps resolution, five fault inputs, ten external event triggers, and synchronous master/slave operation - designed for multi-phase PWM control in resonant LLC converters and three-phase motor drives where sub-nanosecond timing alignment is critical.

Key Specifications

Pinout & Package

LQFP64 package with exposed thermal pad; 64-pin quad flat pack, 0.5 mm pitch, RoHS-compliant ECOPACK®2 finish. Pinout validated per STMicroelectronics DS9994 Rev 9, Section 4 ("Pinout and pin descriptions").

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar mixed-signal control applications.

Compared with STM32F334R8T7, STM32F303RET6 trades analog integration for larger memory, while STM32G474RET6 extends all key analog/timing capabilities with added security and resolution - making it suitable for upgraded platforms needing future-proofing without PCB redesign.

Availability

STM32F334R8T7 is available at Aetrix Electronics and suitable for digital power supplies, industrial motor drives, and medical infusion pump controllers requiring stable component supply across extended product lifecycles.

Supply support for STM32F334R8T7 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.

The STM32F3-series targets cost-sensitive, analog-intensive real-time control applications - emphasizing high-resolution timing, integrated opamps/comparators, and fast ADC/DAC for digital power, motor control, and sensor fusion.

FAQ

What is the maximum operating temperature range for STM32F334R8T7?

The STM32F334R8T7 is rated for industrial temperature range: –40 °C to +85 °C ambient. Thermal derating begins above 70 °C case temperature; full electrical specifications are guaranteed within this range per DS9994 Rev 9, Section 6.3.1. The LQFP64 package's θ_JA is 44 °C/W, requiring ≥2 cm² copper pour under the thermal pad for sustained 72 MHz operation at 85 °C ambient.

Does STM32F334R8T7 support USB device functionality?

Yes - it integrates a full-speed (12 Mbps) USB 2.0 device interface with internal transceiver, supporting CDC ACM, HID, and DFU classes. PA11 (DM) and PA12 (DP) are dedicated USB pins; no external PHY is required. USB clock is derived from PLL with dedicated 48 MHz output, and the device includes USB suspend/resume detection and VBUS sensing capability.

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

Yes - HRTIM1 supports hardware-generated complementary PWM pairs on each of its 5 outputs (EPCx), with independent deadtime insertion (1–255 × 217 ps steps) and automatic fault-induced shutdown. Deadtime values are stored in dedicated registers and applied without CPU intervention, ensuring deterministic response to overcurrent events within <100 ns.

Is the internal OPAMP usable as a programmable-gain amplifier (PGA)?

Yes - the single OPAMP (OPAMP1) supports PGA mode with gains of 1, 2, 4, 8, 16, or 32 via internal resistor ladder configuration. All terminals (VINM, VINP, VOUT) are accessible on GPIO pins, and the amplifier operates from 2.4–3.6 V VDDA supply. Gain selection is controlled by OPAMP1_CSR register bits, and the output can drive ADC inputs directly for calibrated signal amplification.