STMicroelectronics STM32F334K6T7

Overview

STM32F334K6T7 from STMicroelectronics is an Arm® Cortex®-M4 32-bit MCU with FPU, operating up to 72 MHz, featuring 64 KB Flash, 16 KB SRAM, dual 12-bit ADCs (0.20 µs conversion), triple 12-bit DACs, and a 217 ps resolution HRTIM for precision power control in digital power supplies and motor drives.

For engineers reviewing the STM32F334K6T7 datasheet, STM32F334K6T7 pinout, STM32F334K6T7 application, or STM32F334K6T7 equivalent, key selection criteria include HRTIM timing resolution, analog peripheral supply ranges (VDDA 2.0–3.6 V), CAN 2.0B interface support, and LQFP32 package compatibility with space-constrained industrial control designs.

Technical Context

The device integrates a high-resolution timer (HRTIM1) with six 16-bit counters, 10 PWM outputs, five fault inputs, and sub-nanosecond timing resolution-enabling synchronous rectification, multi-phase interleaving, and real-time protection in switched-mode power supplies. Its analog subsystem includes three rail-to-rail comparators, one programmable-gain operational amplifier, and capacitive touch sensing across 18 channels.

Clock architecture supports multiple sources: 4–32 MHz external crystal, 32 kHz RTC oscillator with calibration, 8 MHz internal RC (PLL-scalable to 64 MHz), and 40 kHz low-power RC. Power management includes Sleep/Stop/Standby modes, programmable voltage detector (PVD), and separate VDD/VDDA domains for mixed-signal integrity.

Key Specifications

Pinout & Package

LQFP32 (7 × 7 mm, 0.8 mm pitch) package with 25 general-purpose I/O pins, all mappable to external interrupt vectors; 5 V-tolerant on selected pins; dedicated VDDA/VSSA, VREF+, VREF−, and VBAT pins for analog domain isolation and RTC backup.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar microcontroller applications.

Compared with STM32F334K6T7, STM32F303K8T6 omits critical digital power peripherals (HRTIM, OPAMP, triple DAC), while STM32G431KB6 retains pin compatibility but delivers superior analog performance and timing resolution-making it the recommended migration path for next-generation designs.

Availability

STM32F334K6T7 is available at Aetrix Electronics and suitable for digital power supplies, motor drive controllers, industrial sensor transmitters, and programmable analog front-ends requiring stable component supply across long-lifecycle industrial programs.

Supply support for STM32F334K6T7 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, sensors, and automotive ICs with strong industrial and automotive qualification heritage.

The STM32F3 series targets cost-sensitive, analog-intensive embedded applications-designed specifically for digital power conversion, motor control, and capacitive touch interfaces where precision timing and integrated analog peripherals reduce system complexity.

FAQ

What is the maximum operating frequency of the STM32F334K6T7 core?

The STM32F334K6T7 features an Arm Cortex-M4 core with FPU, rated for a maximum clock frequency of 72 MHz. This is achieved using the internal 8 MHz RC oscillator with PLL multiplication or an external crystal up to 32 MHz. The core supports single-cycle multiplication and hardware division, enabling deterministic execution of control algorithms in real-time applications such as digital power supplies.

Does the STM32F334K6T7 support hardware CRC calculation?

Yes, the STM32F334K6T7 includes a dedicated cyclic redundancy check (CRC) calculation unit compliant with IEEE 802.3. It supports programmable polynomial configuration (default 32-bit CRC-32) and can compute CRC over memory blocks or data streams without CPU intervention-commonly used for firmware integrity verification, secure boot validation, and communication packet checksumming in CAN or USART protocols.

What analog supply voltage range is required for the ADC and DAC peripherals?

The ADC requires VDDA between 2.0 V and 3.6 V, while DAC operation mandates an analog supply (VDDA) from 2.4 V to 3.6 V. These ranges are strictly enforced per datasheet Section 6.3.1; operation outside these limits risks degraded linearity, missing codes, or permanent damage. Separate VDDA/VSSA routing with dedicated decoupling is mandatory to maintain SNR and monotonicity specifications.

Can the STM32F334K6T7 operate in low-power modes while retaining RTC and backup register functionality?

Yes, the STM32F334K6T7 supports Stop and Standby low-power modes with RTC and backup registers retained using VBAT (1.8–3.6 V). In Stop mode, the RTC continues running with calendar alarm and periodic wakeup capability; in Standby mode, only the RTC and 4 KB of backup SRAM remain powered. Wakeup latency from Stop mode is typically 5.2 µs, enabling rapid resumption of control tasks after event-triggered interrupts.