STMicroelectronics STM32F303R8T6

Overview

STM32F303R8T6 from STMicroelectronics is a 32-bit Arm® Cortex®-M4 microcontroller with FPU, operating up to 72 MHz, featuring 64 KB Flash, 12 KB SRAM with hardware parity, and integrated analog peripherals including two 12-bit ADCs (21-channel, 0.20 µs conversion), three 12-bit DACs, three rail-to-rail comparators, and one programmable-gain operational amplifier. It targets motor control, digital power conversion, and industrial sensing systems requiring real-time signal processing and mixed-signal integration.

For engineers reviewing the STM32F303R8T6 datasheet, STM32F303R8T6 pinout, STM32F303R8T6 application, or STM32F303R8T6 equivalent, key selection criteria include its dual ADC architecture with differential mode support, 18-capacitive-touch-channel TSC, CAN 2.0B interface, and 51 GPIOs with interrupt mapping-critical for closed-loop control and human-machine interface designs.

Technical Context

The STM32F303R8T6 implements an Arm Cortex-M4 core with single-cycle multiply and hardware divide, delivering 90 DMIPS at 72 MHz. Its interconnect matrix enables concurrent peripheral access without bus contention, supporting deterministic timing in real-time control loops.

Analog subsystem integration includes independent VDDA supply (2.0–3.6 V) for ADC/DAC/COMP/OPAMP, with dedicated 2.4–3.6 V analog supply for DACs and OPAMP, and selectable 6/8/10/12-bit ADC resolution across 21 input channels-all configurable via DMA-triggered sequences with hardware oversampling.

Key Specifications

Pinout & Package

LQFP64 (10 × 10 mm, 0.5 mm pitch) package with 51 general-purpose I/O pins, all mappable to external interrupt vectors; 5 V-tolerant on selected pins; VDD/VDDA/VSS/VSSA pins distributed for analog/digital noise isolation; NRST, BOOT0, SWDIO/SWCLK for debug and boot control.

Key Features

Applications

Equivalent & Alternatives

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

Compared with STM32F303K8U6, the STM32F303R8T6 delivers full motor control capability via TIM1 and dual ADCs; versus STM32F072RBT6, it provides hardware-accelerated math, integrated analog front-end, and deterministic low-latency peripherals - critical for closed-loop industrial systems.

Availability

STM32F303R8T6 is available at Aetrix Electronics and suitable for motor control systems, digital power converters, industrial HMI panels, and predictive maintenance sensor nodes requiring stable component supply and long-term manufacturability.

Supply support for STM32F303R8T6 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, specializing in microcontrollers, power management, sensors, and automotive ICs with strong industrial and embedded market focus.

The STM32F3 series is designed for cost-sensitive, performance-demanding mixed-signal applications - combining real-time control, analog integration, and communication interfaces in a single chip for industrial automation and digital power.

FAQ

What is the maximum operating frequency and core type of the STM32F303R8T6?

The STM32F303R8T6 features an Arm Cortex-M4 core with integrated FPU, rated for operation up to 72 MHz. It achieves 90 DMIPS at this frequency using the CCM-SRAM instruction/data bus, with single-cycle multiplication and hardware division support - enabling efficient execution of control algorithms and signal processing tasks without external acceleration.

Does the STM32F303R8T6 support USB device functionality?

No, the STM32F303R8T6 does not include USB hardware. Unlike some other STM32F3 variants (e.g., STM32F303CBT6), the R8T6 in LQFP64 package omits USB D+/D− pins and associated PHY circuitry, as confirmed in Section 3.16 and Table 2 of DS9866 Rev 8. Communication relies on CAN, USART, I²C, and SPI interfaces.

What analog supply voltage ranges are required for its ADC, DAC, and OPAMP peripherals?

The STM32F303R8T6 requires VDDA = 2.0–3.6 V for ADCs and comparators; DACs and the operational amplifier require a separate analog supply of 2.4–3.6 V (VDDA must be ≥2.4 V when using DAC/OPAMP). These ranges are specified in Tables 3 and 63–67 of DS9866 Rev 8 and must be independently filtered and decoupled to maintain linearity and noise immunity.

How many capacitive sensing channels does the TSC support, and what configurations are possible?

The built-in Touch Sensing Controller (TSC) supports up to 18 capacitive sensing channels, configurable as touchkeys, linear touch sliders (up to 8 segments), or rotary touch wheels (up to 16 positions). All channels share a common charge-transfer architecture with programmable sampling time and spread-spectrum modulation - enabling robust operation in noisy industrial environments per AN4640 and RM0316 documentation.