STMicroelectronics STM32F334R8T6TR

Overview

STM32F334R8T6TR 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 features three 12-bit DACs, three rail-to-rail comparators, one programmable-gain operational amplifier, dual 12-bit ADCs (0.20 µs conversion), and CAN 2.0B interface - deployed in digital power supplies for real-time PWM control and closed-loop feedback.

For engineers reviewing the STM32F334R8T6TR datasheet, STM32F334R8T6TR pinout, STM32F334R8T6TR application, or STM32F334R8T6TR equivalent, key selection criteria include HRTIM precision for multi-phase SMPS, analog peripheral integration (DAC/COMP/OPAMP) enabling sensorless motor control, and LQFP64 package compatibility with industrial PCB 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 memory subsystem includes 64 KB Flash with error correction, 12 KB SRAM with parity, and 4 KB CCM-SRAM for time-critical code execution.

HRTIM1 provides six 16-bit counters with 217 ps resolution, 10 PWM outputs, five fault inputs, and synchronous event chaining - enabling precise interleaved or phase-shifted switching in resonant LLC and PFC topologies without external timing ICs.

Key Specifications

Pinout & Package

LQFP64 (10 × 10 mm, 0.5 mm pitch) package with exposed thermal pad; RoHS-compliant and ECOPACK®2 certified.

Key Features

Applications

Equivalent & Alternatives

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

Compared with STM32F334K8T6, the R8T6 offers full HRTIM feature set and 64-pin routability for complex power stage interconnects; versus STM32G474RET6, it trades raw CPU performance for on-die analog integration - optimizing cost and component count in mid-power (<1 kW) applications.

Availability

STM32F334R8T6TR is available at Aetrix Electronics and suitable for digital power supplies, motor control modules, industrial CAN nodes, and programmable AC/DC power modules requiring stable component supply and long-term production continuity.

Supply support for STM32F334R8T6TR 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, designing and manufacturing microcontrollers, power devices, sensors, and analog ICs for industrial, automotive, and consumer markets.

The STM32F3 series targets cost-sensitive, analog-rich embedded control applications - specifically engineered for digital power conversion, motor control, and capacitive touch interfaces with integrated high-precision timing and signal conditioning.

FAQ

What is the maximum operating temperature range for STM32F334R8T6TR?

The STM32F334R8T6TR 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 for sustained 72 MHz operation under full peripheral load.

Does STM32F334R8T6TR support hardware cryptographic acceleration?

No. The STM32F334R8T6TR does not include AES, SHA, or PKA accelerators. It relies on software libraries (e.g., Mbed TLS) for encryption. Cryptographic functionality is introduced in later families like STM32L4+ and STM32H7, not in the F3 series.

Can the internal op-amp be configured as a transimpedance amplifier for photodiode sensing?

Yes. The integrated op-amp supports PGA mode with gain settings from 1× to 16×, and its non-inverting/inverting inputs and output are accessible via GPIO pins (e.g., PA1, PA4, PA5). Section 3.12 of DS9994 confirms direct terminal routing - enabling TIA configurations with external feedback resistors up to 10 MΩ.

Is the HRTIM1 peripheral capable of generating complementary PWM outputs with programmable deadtime?

Yes. HRTIM1 supports complementary PWM on each of its six timers, with independent deadtime insertion (0–255 × timer period) and automatic fault-induced shutdown. Table 55 and Section 3.14.1 detail hardware-enforced deadtime generation and FLTx-triggered forced state transitions within <100 ns.