STMicroelectronics STM32F303CCT6

Overview

STM32F303CCT6 from STMicroelectronics is an Arm® Cortex®-M4 32-bit microcontroller with FPU, operating up to 72 MHz, featuring 256 KB Flash, 48 KB SRAM (including 8 KB CCM), four 12-bit ADCs (39-channel, 0.2 µs conversion), two 12-bit DACs, seven rail-to-rail comparators, and four programmable-gain operational amplifiers - deployed in industrial motor control, digital power supplies, and analog signal conditioning systems.

For engineers reviewing the STM32F303CCT6 datasheet, STM32F303CCT6 pinout, STM32F303CCT6 application, or STM32F303CCT6 equivalent, key selection criteria include integrated analog front-end capability (PGA + COMP + DAC), CAN 2.0B interface, capacitive touch sensing support, and dual 16-bit advanced timers with deadtime generation for three-phase inverter control.

Technical Context

The device integrates a Cortex-M4 core with hardware floating-point unit and memory protection unit (MPU), enabling deterministic real-time execution of DSP-intensive algorithms such as field-oriented control (FOC) and digital PID loops. Its interconnect matrix decouples peripheral bus arbitration from CPU timing, allowing concurrent analog acquisition, PWM update, and USB communication without contention.

Analog subsystem coherency is maintained via shared VREFOPAMP and VDDA supply domains (2.4–3.6 V), with dedicated 16-bit timers driving DACs and advanced timers (TIM1/TIM8) supporting complementary PWM outputs with configurable deadtime and emergency stop - critical for IGBT/MOSFET gate driving in motor drives.

Key Specifications

Pinout & Package

LQFP64 (10 × 10 mm, 0.5 mm pitch) package with exposed thermal pad; RoHS-compliant, industrial temperature range (–40°C to +85°C).

Key Features

Applications

Equivalent & Alternatives

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

Compared with STM32F303RCT6, the CCT6 offers identical functionality at lower cost due to Flash/SRAM binning; versus STM32G431KBT6, it trades higher clock speed and newer analog features for proven industrial qualification, broader toolchain support, and lower system-level BOM cost in mature motor control designs.

Availability

STM32F303CCT6 is available at Aetrix Electronics and suitable for industrial motor control, digital power supplies, capacitive touch HMI, and PLC I/O modules requiring stable component supply and long-term manufacturing continuity.

Supply support for STM32F303CCT6 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-grade components since 1987.

The STM32F3 series targets cost-sensitive, analog-intensive embedded applications - specifically engineered to integrate high-precision analog peripherals (PGA, COMP, DAC) with real-time control capabilities for industrial automation and digital power conversion.

FAQ

What is the maximum operating frequency and how is it achieved?

The STM32F303CCT6 achieves a maximum CPU frequency of 72 MHz using its internal 8 MHz RC oscillator multiplied by a PLL with programmable dividers. This requires configuring the PLL source (HSI or HSE), multiplication factor (up to ×9), and APB prescalers per RM0316. The 72 MHz clock feeds the AHB bus, enabling full-speed execution of DSP instructions and real-time peripheral response.

Does this MCU support hardware-based functional safety certification?

Yes - the STM32F303CCT6 includes safety-critical features required for IEC 61508 SIL-2 and UL 1998 compliance: memory protection unit (MPU), independent/window watchdog timers, programmable voltage detector (PVD), CRC calculation unit, and redundant clock monitoring. ST provides certified safety firmware libraries and FMEDA reports under the STM32 Functional Safety Program.

How many analog input channels can be simultaneously sampled with hardware synchronization?

Up to four ADCs can be triggered synchronously via TIM1/TRGO or TIM8/TRGO events, enabling simultaneous sampling of up to 39 total channels (e.g., three phase currents + DC bus voltage). Each ADC supports hardware oversampling and injected channel sequencing, achieving effective resolution up to 16 bits with reduced noise floor in motor current sensing applications.

Is the LQFP64 package of STM32F303CCT6 pin-compatible with other STM32F3 variants?

Yes - the LQFP64 package (10 × 10 mm) is mechanically and electrically pin-compatible across STM32F303xB/C sub-families (e.g., STM32F303CBT6, STM32F303RBT6). Pin definitions, alternate functions, and power/ground allocations match exactly, enabling drop-in replacement during design iteration or product variant scaling without PCB redesign.