STM32F303CCT6

STMicroelectronics STM32F303CCT6: ARM Cortex-M4F MCU with 256 KB Flash in LQFP-48

The STMicroelectronics STM32F303CCT6 is a 32-bit microcontroller from the STM32F3 series, built around an Arm Cortex-M4 core with single‑precision floating‑point unit (FPU) and designed to operate up to 72 MHz. Packaged in a compact LQFP‑48 (7 x 7 mm, 0.5 mm pitch) and supplied in tray format for production, this device blends performance compute with rich mixed‑signal peripherals, making it a practical choice for motor control, industrial sensing, power conversion, and general embedded control.

Engineers value the STM32F303CCT6 for its strong analog capabilities—fast 12‑bit ADCs in a multi‑ADC architecture and dual 12‑bit DACs—paired with versatile timers and standard serial interfaces. Combined with a wide supply range (2.0 V to 3.6 V) and an extended operating temperature (‑40°C to +85°C), it delivers the balance of performance and integration needed for robust industrial designs.

Highlights at a Glance

• Manufacturer/Brand: STMicroelectronics
• Series: STM32F3
• Category: 32‑bit Microcontrollers (MCUs)
• Core: Arm Cortex‑M4F (with FPU)
• Max clock frequency: 72 MHz
• Flash memory: 256 KB
• Analog: 12‑bit ADCs (multi‑ADC architecture), 2 × 12‑bit DAC
• Timers: Advanced‑control, general‑purpose, and basic timers
• Interfaces: USART/UART, I2C, SPI (I2S); bxCAN (package dependent)
• Package: LQFP‑48 (7 x 7 mm), 0.5 mm pitch; Tray
• Mounting: Surface‑mount
• Operating temperature: ‑40°C to +85°C (grade 6)
• Supply voltage: 2.0 V to 3.6 V
• I/O: Multiple GPIO with external interrupt capability
• Lifecycle status: Active
• RoHS status: RoHS Compliant

Note: Some peripheral availability and counts are package dependent. Refer to the official datasheet for the exact feature set of the LQFP‑48 (T6) variant.

Why Choose the STM32F303CCT6?

Design teams working on mixed‑signal control systems need a microcontroller that is equally comfortable handling real‑time control loops and precise analog measurements. The STM32F303CCT6 brings a capable Arm Cortex‑M4F core together with fast 12‑bit ADCs and on‑chip DACs, giving you both the compute and analog building blocks in one device. Its extended temperature rating and industrial‑ready packaging further position it well for production deployments in control cabinets, drives, and instrumentation.

For sourcing managers, the STM32F303CCT6 is part of the established STM32F3 family and is listed as Active by STMicroelectronics, simplifying lifecycle planning. The RoHS‑compliant status supports global compliance requirements.

Key Specifications

• Core and Performance
• Arm Cortex‑M4F (with FPU)
• Up to 72 MHz operation
• Memory
• 256 KB Flash memory
• Analog Subsystem
• 12‑bit ADCs (multi‑ADC architecture)
• 2 × 12‑bit DAC
• Timers
• Advanced‑control, general‑purpose, and basic timers
• Communication Interfaces
• USART/UART, I2C, SPI (I2S)
• bxCAN (availability is package dependent)
• Operating Conditions
• Supply voltage: 2.0 V to 3.6 V
• Temperature range: ‑40°C to +85°C (grade 6)
• I/O
• Multiple GPIO; external interrupt capability
• Packaging and Assembly
• Package: LQFP‑48 (7 x 7 mm), 0.5 mm pitch
• Packaging: Tray
• Mounting type: Surface‑mount

If a parameter is not listed here, it is not specified in the provided datasheet reference and should be verified in the official documentation.

Architecture and Performance

The STM32F303CCT6 employs an Arm Cortex‑M4F core that integrates a single‑precision floating‑point unit. This helps accelerate math‑heavy control algorithms and sensor processing without resorting to software‑only math libraries, improving both performance and code density. The device operates up to 72 MHz, providing headroom for real‑time control tasks while maintaining power efficiency typical of Cortex‑M based MCUs.

For applications like field‑oriented motor control, digital power conversion, or high‑rate data acquisition, the combination of 72 MHz performance and hardware FPU is especially advantageous. It allows designers to implement sophisticated control loops and filtering while maintaining deterministic behavior.

Mixed‑Signal Analog Capabilities

A defining characteristic of the STM32F303CCT6 is its analog integration:

• 12‑bit ADCs using a multi‑ADC architecture: This enables fast sampling strategies, parallel channel handling, or interleaved modes depending on the specific configuration supported by the device variant. Consult the datasheet for detailed channel counts and achievable sampling modes for the LQFP‑48 package.
• Dual 12‑bit DACs: On‑chip DACs simplify generation of analog control signals, bias voltages, or waveform outputs without additional external converters.

By colocating compute and analog in one MCU, the STM32F303CCT6 reduces BOM complexity and helps improve signal integrity versus split‑component designs. This is particularly effective in closed‑loop control where low latency between measurement and actuation is essential.

Timers and Real‑Time Control

The timer suite includes advanced‑control, general‑purpose, and basic timers. Advanced‑control timers are typically used for PWM generation and complementary outputs needed in motor drives or power stage control. General‑purpose timers cover a wide range of timing, capture/compare, and PWM needs, while basic timers support system timebases or periodic tasks. Exact timer counts and channels are package and subfamily dependent; verify against the STM32F303CCT6 datasheet for the LQFP‑48 implementation.

Connectivity and Communication

Built‑in serial interfaces make it straightforward to connect the STM32F303CCT6 to sensors, actuators, and host systems:

• USART/UART for asynchronous links and bootloaders
• I2C for sensor hubs and configuration buses
• SPI (I2S) for high‑speed peripheral links and audio‑style serial data
• bxCAN (package dependent) for robust fieldbus communication where supported

Because availability and instance counts can vary by package, always confirm the exact interface set for the LQFP‑48 T6 variant in the official datasheet.

Power, Package, and Thermal Considerations

• Supply voltage: 2.0 V to 3.6 V offers flexibility for operation from regulated 3.3 V rails or low‑power designs.
• Operating temperature: ‑40°C to +85°C (grade 6) suits industrial environments and extended ambient conditions typical of control cabinets and machinery.
• Package: LQFP‑48 (7 x 7 mm, 0.5 mm pitch) is easy to assemble on standard SMT lines and provides a compact footprint for dense PCBs.
• Packaging: Tray format supports automated pick‑and‑place in volume manufacturing.

As with any mixed‑signal MCU, good layout practices are essential. Keep analog and digital returns well‑managed, place decoupling capacitors close to supply pins, and follow the datasheet’s guidance on reference and ground pins. These practices help you extract the full performance of the ADCs and DACs while minimizing noise.

Target Applications

The STM32F303CCT6 is well‑suited for:

• Motor control and drives
• Industrial control and automation
• Instrumentation and mixed‑signal sensing
• Power conversion and digital PFC
• Consumer and appliance control

These use cases benefit from the device’s combination of real‑time compute, mixed‑signal integration, and versatile timers and serial interfaces.

Lifecycle, Availability, and Sourcing

• Lifecycle status: Active (per STMicroelectronics)
• RoHS status: RoHS Compliant
• Packaging: Tray; Surface‑mount (LQFP‑48)
• Replacements: Not specified

For pricing and availability, STMicroelectronics recommends contacting authorized distribution. If your organization requires specific date‑code lots or long‑term supply commitments, discuss forecast and buffer strategies with your distributor. Inventory for this specific MPN may vary; if you encounter allocation, consider setting up a demand schedule and leveraging multi‑source stocking through franchised partners.

If your design may eventually migrate across pin counts or memory sizes within the STM32F3 series, align your PCB and firmware abstractions accordingly and confirm peripheral availability for each target package. The provided note from ST indicates that some features are package dependent; validate your bill of materials and test plan against the LQFP‑48 (T6) datasheet details before release to manufacturing.

Environmental and Regulatory Compliance

• RoHS: Compliant
• Operating temperature: ‑40°C to +85°C

If you require additional environmental documentation (e.g., REACH, material declarations), consult STMicroelectronics’ product page or request compliance documents through your distributor.

Design‑In Notes

• Feature counts and certain peripheral options are package dependent; always reference the STM32F303CCT6 (LQFP‑48 T6) datasheet for definitive specifications.
• For motor control, leverage advanced‑control timers for PWM generation and coordinate ADC sampling with PWM edges to minimize measurement noise.
• For precision measurement, pay careful attention to analog reference and grounding strategies. Separate noisy digital domains from analog inputs and route clocks and high‑di/dt traces away from sensitive analog nodes.
• Validate that the communication interfaces you need (e.g., bxCAN) are available in the LQFP‑48 variant and that pin muxing aligns with your board’s connector and transceiver placement.
• Use the wide supply range (2.0 V to 3.6 V) to simplify power tree design; ensure decoupling and bulk capacitance meet transient requirements for high‑load events.

Comparison and Selection Guidance

Within the STM32F3 family, devices may differ by flash size, RAM size, peripheral counts, and package options. If your application requires more memory, additional timers, or different analog configurations, consult ST’s parametric selector for a closely related MPN. Keeping your design flexible—especially around pin multiplexing and peripheral instances—will ease future transitions without major PCB changes.

Resources

• Product Page (STMicroelectronics): https://www.st.com/en/microcontrollers-microprocessors/stm32f303cc.html
• Datasheet: https://www.st.com/resource/en/datasheet/stm32f303xc.pdf

Refer to these official resources for the latest and most precise specifications, electrical characteristics, and peripheral availability for the STM32F303CCT6.

Frequently Asked Questions (FAQs)

Q: What CPU core does the STMicroelectronics STM32F303CCT6 use?
A: An Arm Cortex‑M4 core with single‑precision FPU (Cortex‑M4F).

Q: What is the maximum operating frequency of the STM32F303CCT6?
A: Up to 72 MHz.

Q: How much embedded Flash does the STM32F303CCT6 include?
A: 256 KB of Flash memory.

Q: What package is the STM32F303CCT6 available in?
A: LQFP‑48 (7 x 7 mm) with 0.5 mm pitch; supplied in tray packaging for production.

Q: Which analog peripherals are integrated?
A: Fast 12‑bit ADCs (multi‑ADC architecture) and 2 × 12‑bit DACs.

Q: Which serial interfaces are supported?
A: USART/UART, I2C, SPI (I2S), and bxCAN (availability is package dependent; verify for the LQFP‑48 variant).

Q: What are the supply voltage and operating temperature ranges?
A: 2.0 V to 3.6 V supply and ‑40°C to +85°C (grade 6) operating temperature.

Q: What is the lifecycle status of the STM32F303CCT6?
A: Active, according to STMicroelectronics.

Q: Are there specified drop‑in replacements?
A: No replacements are specified; evaluate other STM32F3 family members if you need different memory sizes or peripheral mixes.

By leveraging the STMicroelectronics STM32F303CCT6, engineers can consolidate control, sensing, and actuation into a single, industrial‑grade MCU that is both capable and supply‑chain ready. Its combination of a Cortex‑M4F core, robust analog features, versatile timers, and standard serial interfaces makes it a strong foundation for motor control, industrial automation, and mixed‑signal instrumentation designs. For up‑to‑date specifications and package‑specific details, always consult the official datasheet and product page.