STMicroelectronics STM32F303CCT6TR

Overview

STM32F303CCT6TR from STMicroelectronics is an Arm® Cortex®-M4 32-bit MCU 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, analog signal conditioning, and capacitive touch HMI systems.

For engineers reviewing the STM32F303CCT6TR datasheet, STM32F303CCT6TR pinout, STM32F303CCT6TR application, or STM32F303CCT6TR equivalent, key selection considerations include its integrated analog front-end (4 OPAMPs + 7 COMP + dual DAC), CAN 2.0B interface, 87 fast I/Os (up to 5 V-tolerant), and support for capacitive sensing across 24 channels - all in LQFP48 package.

Technical Context

The device integrates a Cortex-M4 core with hardware FPU and MPU, enabling deterministic real-time control with DSP instructions. Its interconnect matrix decouples peripheral bus arbitration, allowing concurrent ADC sampling, DMA transfers, and timer-triggered DAC updates without CPU intervention.

Analog subsystem design centers on flexible supply separation: VDDA (2.0–3.6 V) powers ADC/DAC/COMP, while VREFOPAMP (2.4–3.6 V) enables precision PGA gain configuration. The TSC supports linear/rotary touch sensors via charge-transfer measurement with hardware auto-calibration.

Key Specifications

Pinout & Package

LQFP48 package (7 × 7 mm, 0.5 mm pitch), 48-pin quad flat lead frame with exposed thermal pad. Pin 1 marked by dot or bevelled corner; pins numbered counterclockwise.

Key Features

Applications

Equivalent & Alternatives

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

Compared with STM32F303K8U6, the STM32F303CCT6TR adds 24-channel capacitive sensing and 11 extra GPIOs in LQFP48; versus STM32F411CEU6, it trades raw performance for integrated analog signal chain - reducing component count in sensor/motor control designs.

Availability

STM32F303CCT6TR is available at Aetrix Electronics and suitable for industrial motor control, smart sensor nodes, capacitive touch HMI, and programmable power supplies requiring stable component supply and long-term manufacturability.

Supply support for STM32F303CCT6TR 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 - combining high-precision mixed-signal peripherals with Cortex-M4 performance to replace discrete analog + MCU solutions in motor control, medical devices, and HMI systems.

FAQ

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

The STM32F303CCT6TR achieves 72 MHz maximum CPU frequency using its internal 8 MHz RC oscillator multiplied by a PLL with configurable dividers. External crystal options (4–32 MHz) may also feed the PLL for improved timing stability. All peripherals operate synchronously at this frequency unless prescaled, and flash wait states are automatically managed up to 72 MHz.

Does this MCU support hardware encryption or secure boot?

No, the STM32F303CCT6TR does not include hardware cryptographic accelerators (AES, SHA, PKA) or secure boot functionality. It lacks a true random number generator and tamper-detection features. For secure firmware updates or data confidentiality, external secure elements or software-based libraries must be used - unlike later STM32L4/L5 or STM32H7 series that integrate TrustZone or AES engines.

How many independent ADCs are available and what is their simultaneous sampling capability?

The device integrates four independent 12-bit ADCs (ADC1–ADC4), each with up to 19 input channels. All four can be triggered simultaneously via hardware synchronization (e.g., TIM8 TRGO), enabling true simultaneous sampling of up to 39 analog signals - critical for three-phase motor current reconstruction and vibration analysis in predictive maintenance systems.

What debug interfaces are supported and are they accessible in production?

It supports Serial Wire Debug (SWD) via PA13 (SWDIO) and PA14 (SWCLK), plus optional JTAG (using PA15 as NJTRST). These pins remain functional in all debug modes and do not require special configuration to enable - allowing in-circuit debugging, flash programming, and real-time tracing even after deployment, provided physical access and SWD connector are retained on the PCB.