STMicroelectronics STM32F334C8Y7TR

Overview

STM32F334C8Y7TR 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 control in AC/DC and DC/DC converters.

For engineers reviewing the STM32F334C8Y7TR datasheet, STM32F334C8Y7TR pinout, STM32F334C8Y7TR application, or STM32F334C8Y7TR equivalent, key selection criteria include HRTIM resolution, analog peripheral supply ranges (VDDA 2.0–3.6 V), DAC/ADC coexistence, op-amp PGA capability, and CAN 2.0B interface support in compact UFQFPN32 packaging.

Technical Context

The device integrates a dual-bus interconnect matrix enabling concurrent access to Flash, SRAM, and peripherals, with dedicated CCM-SRAM (4 KB) for time-critical code execution. Its HRTIM1 subsystem features six 16-bit counters, five fault inputs, and synchronous PWM output coordination - essential for interleaved or phase-shifted multi-phase power topologies.

Analog subsystems operate with independent supply domains: ADCs accept 0–3.6 V input with selectable 6/8/10/12-bit resolution; DACs require 2.4–3.6 V analog supply; comparators and op-amp share 2.0–3.6 V VDDA, supporting fast closed-loop response in real-time power regulation.

Key Specifications

Pinout & Package

STM32F334C8Y7TR uses a 32-pin UFQFPN package (5 × 5 mm, 0.5 mm pitch) with exposed thermal pad, optimized for space-constrained power converter PCB layouts and thermal dissipation in enclosed enclosures.

Key Features

Applications

Equivalent & Alternatives

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

Compared with STM32F334C8Y7TR, the R8T6 offers expanded I/O and memory in LQFP64 but lacks the compact thermal profile of UFQFPN32; the G474RET6 delivers superior performance and resolution but requires redesign for higher clock tree complexity and power delivery.

Availability

STM32F334C8Y7TR is available at Aetrix Electronics and suitable for AC/DC power supplies, motor drives, programmable DC sources, and grid-tie inverters requiring stable component supply and long-term industrial lifecycle support.

Supply support for STM32F334C8Y7TR 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-sensitive, analog-rich embedded control applications - specifically engineered for digital power conversion, motor control, and sensor fusion where precision timing and integrated analog peripherals reduce system-level BOM and design complexity.

FAQ

What is the maximum operating temperature range for STM32F334C8Y7TR?

The STM32F334C8Y7TR is rated for industrial temperature operation from –40 °C to +85 °C, validated per ST's qualification standards (AEC-Q100 not applicable). Thermal performance is specified with junction-to-case resistance (R_θJC) of 45 °C/W in UFQFPN32 package, requiring minimum 1 cm² copper pour under the exposed pad for reliable operation at 72 MHz in ambient temperatures up to 70 °C.

Does STM32F334C8Y7TR support USB device functionality without external components?

Yes - it integrates a full-speed USB 2.0 device PHY with internal transceiver, pull-up resistor, and voltage regulator. PA11 (D−) and PA12 (D+) connect directly to the USB connector; no external transceiver, level shifter, or termination resistors are required. Firmware must implement USB device stack (e.g., STM32Cube USB Device Library) and handle descriptor enumeration and endpoint management.

How many independent PWM outputs can be generated simultaneously using HRTIM1?

HRTIM1 provides 10 fully independent PWM outputs (HRTIM1_CH1–CH10), each with configurable polarity, deadtime, and fault protection. All 10 outputs can be active concurrently with synchronized phase alignment, enabling complex topologies such as three-phase interleaved PFC, dual-active-bridge DC/DC, or six-step motor commutation with hardware-enforced timing constraints.

Is the op-amp in STM32F334C8Y7TR usable as a standalone instrumentation amplifier?

No - the single integrated op-amp supports only non-inverting, inverting, and programmable-gain amplifier (PGA) configurations using internal resistors. It lacks dedicated differential inputs or matched resistor networks required for true instrumentation amplifier behavior. For differential signal conditioning, external op-amps or discrete resistor networks must be used; the internal op-amp is best applied to single-ended current-sense amplification or DAC output buffering.