STMicroelectronics STM32F334C6T6

Overview

STM32F334C6T6 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 integrates three 12-bit DACs, two ADCs (0.20 µs conversion), one rail-to-rail op-amp, three ultra-fast comparators, and capacitive sensing-targeted for digital power control in switched-mode power supplies (SMPS) and motor control inverters.

For engineers reviewing the STM32F334C6T6 datasheet, STM32F334C6T6 pinout, STM32F334C6T6 application, or STM32F334C6T6 equivalent, key selection criteria include HRTIM1 sub-nanosecond PWM timing, analog peripheral supply range (2.4–3.6 V for DAC/op-amp), LQFP48 package compatibility, and CAN 2.0B interface support for industrial feedback networks.

Technical Context

The STM32F334C6T6 implements a tightly coupled analog-digital architecture optimized for real-time power conversion: its HRTIM1 features six 16-bit counters with 217 ps resolution, five fault inputs, and synchronous PWM output coordination-enabling precise deadtime management and phase-shifted interleaving in multi-phase DC-DC converters.

Its analog subsystem includes a programmable-gain amplifier (PGA) mode on the single op-amp, three independent 12-bit DACs with monotonicity guaranteed over full temperature range, and dual ADCs supporting simultaneous sampling with selectable 6/8/10/12-bit resolution-each with dedicated analog supply (VDDA = 2.0–3.6 V) and hardware oversampling for enhanced SNR in current/voltage sensing.

Key Specifications

Pinout & Package

LQFP48 package with exposed thermal pad; 48-pin square outline, 0.5 mm pitch, body size 7 × 7 mm, compliant with ECOPACK®2 environmental standard.

Key Features

Applications

Equivalent & Alternatives

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

Compared with STM32F334R6T6, the C6T6 reduces PCB area by 30% and eliminates USB PHY overhead; versus STM32G431KB6, it delivers identical HRTIM timing fidelity at lower cost and power, making it the preferred choice for established 1–2 MHz digital power platforms.

Availability

STM32F334C6T6 is available at Aetrix Electronics and suitable for switched-mode power supplies, motor control inverters, industrial analog I/O modules, and capacitive touch HMI systems requiring stable component supply across multi-year production cycles.

Supply support for STM32F334C6T6 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 devices, sensors, and analog ICs for industrial, automotive, and consumer markets.

The STM32F3 series targets cost-sensitive, analog-intensive embedded applications-specifically engineered to integrate high-precision timing, mixed-signal peripherals, and real-time control capabilities into a single chip for digital power and motor control.

FAQ

What is the maximum operating frequency of the STM32F334C6T6's HRTIM1 timer?

The HRTIM1 timer operates with 217 ps resolution across its full 16-bit counter range, corresponding to an effective timing granularity of 4.6 GHz. Its base clock derives from the system PLL (max 72 MHz), but internal prescalers and timer-specific clock trees enable sub-nanosecond edge placement accuracy without requiring external high-frequency sources.

Does the STM32F334C6T6 support USB device functionality?

No. Although the pinout includes USB_DM and USB_DP labels on PA11/PA12, the STM32F334C6T6 silicon does not implement the USB 2.0 Full-Speed PHY or associated USB registers. This is confirmed in DS9994 Rev 9 Table 2, which lists "USB" as not available for the x4/x6/x8 sub-families in LQFP48 packaging.

How many analog comparators are integrated, and what is their propagation delay?

The STM32F334C6T6 integrates three ultra-fast rail-to-rail analog comparators (COMP1–COMP3). Their typical propagation delay is 45 ns with 20 mV overdrive, as specified in DS9994 Rev 9 Section 6.3.21. Each comparator output can be routed directly to HRTIM1 fault inputs for hardware-triggered PWM shutdown within 100 ns.

What is the VDDA voltage range required for guaranteed 12-bit DAC operation?

The DACs require VDDA between 2.4 V and 3.6 V for guaranteed 12-bit monotonicity and integral nonlinearity (INL) within ±1 LSB, per DS9994 Rev 9 Section 6.3.20. Operation below 2.4 V degrades DAC accuracy and may cause missing codes; VDDA must be decoupled independently from VDD using a 100 nF ceramic capacitor close to the VDDA/VSSA pins.