STMicroelectronics STM32F303RCT6TR

Overview

STM32F303RCT6TR 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. It integrates CAN 2.0B, USB 2.0 FS, five USART/UARTs, three SPIs (two with I2S), two I²C Fast Mode Plus interfaces, and a capacitive touch sensing controller - deployed in motor control, digital power conversion, and industrial sensor fusion systems.

For engineers reviewing the STM32F303RCT6TR datasheet, STM32F303RCT6TR pinout, STM32F303RCT6TR application, or STM32F303RCT6TR equivalent, key selection criteria include its analog integration density (4 ADCs + 2 DACs + 7 COMP + 4 PGA), 72 MHz FPU-enabled real-time processing capability, LQFP64 package compatibility, and support for CAN+USB+touch-sensing in a single-chip solution for cost-sensitive embedded control.

Technical Context

The device implements a tightly coupled memory architecture with dual-bus interconnect matrix, enabling concurrent instruction fetch and data access. Its Cortex-M4 core includes DSP extensions, single-cycle MAC, hardware divide, and MPU for secure peripheral isolation - critical for deterministic motor control loops and safety-aware firmware partitions.

Analog subsystems operate on independent supply domains: VDDA (2.0–3.6 V) for ADC/DAC/COMP/PGA, with dedicated reference inputs (VREFINT, VREFOPAMP) and internal calibration. The TSC supports up to 24 capacitive channels with hardware-accelerated filtering, while advanced timers (TIM1/TIM8) deliver 6-channel PWM with programmable deadtime and emergency stop - essential for three-phase inverter gate driving.

Key Specifications

Pinout & Package

LQFP64 package with 64 leads, 0.5 mm pitch, 10 × 10 mm body, exposed thermal pad (EP), RoHS-compliant, rated for industrial temperature range (–40°C to +85°C).

Key Features

Applications

Equivalent & Alternatives

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

Compared with STM32F303VCT6, the STM32F303RCT6TR trades pin count and ADC channel count for compact LQFP64 packaging and lower BOM cost; versus STM32G431KBT6, it retains CAN 2.0B and broader analog integration at the expense of peak clock speed and comparator propagation delay.

Availability

STM32F303RCT6TR is available at Aetrix Electronics and suitable for motor control systems, digital power supplies, industrial sensor hubs, and human-machine interfaces requiring stable component supply, long-term lifecycle assurance, and industrial-grade reliability.

Supply support for STM32F303RCT6TR 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 automotive, industrial, and consumer markets.

The STM32F3 series targets cost-sensitive, analog-intensive embedded applications - combining high-resolution mixed-signal peripherals with Cortex-M4 performance to replace discrete analog + microcontroller solutions in motor drives and power conversion.

FAQ

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

The STM32F303RCT6TR 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) can also feed the PLL for higher stability. The FPU and instruction cache maintain 90 DMIPS performance at this speed, validated across the full industrial temperature range.

Does this MCU support hardware CRC calculation and memory protection?

Yes, it includes a dedicated CRC calculation unit supporting multiple polynomial configurations (e.g., CRC-32, CRC-16-CCITT) for firmware integrity checks. It also features a Memory Protection Unit (MPU) with eight configurable regions, enabling privilege-level enforcement for code, RAM, and peripheral access - critical for functional safety certification.

How many analog peripherals are integrated and what are their key specs?

The MCU integrates four 12-bit ADCs (39-channel total, 0.2 µs conversion), two 12-bit DACs (2.4–3.6 V analog supply), seven rail-to-rail comparators (2–3.6 V supply), and four operational amplifiers usable as PGAs (gain 1–16). All analog blocks share independent VDDA/VSSA domains and support hardware-calibrated references.

Is the LQFP64 package RoHS-compliant and what is its thermal performance?

Yes, the LQFP64 package is RoHS-compliant and qualified for industrial temperature range (–40°C to +85°C). Its thermal resistance (θ_JA) is 46 °C/W under JEDEC-standard PCB conditions. The exposed thermal pad improves heat dissipation and must be soldered to a solid copper pour for optimal thermal performance in continuous 72 MHz operation.