STMicroelectronics STM32F303RET7

Overview

STM32F303RET7 from STMicroelectronics is a 32-bit ARM® Cortex®-M4 microcontroller with FPU, operating at up to 72 MHz, featuring 512 KB Flash, 80 KB SRAM (64 KB + 16 KB CCM), and integrated analog peripherals including four operational amplifiers, seven rail-to-rail comparators, two 12-bit DACs, and four ADCs supporting up to 40 channels. It targets motor control, digital power conversion, and industrial sensing systems requiring real-time signal processing and mixed-signal integration.

For engineers reviewing the STM32F303RET7 datasheet, STM32F303RET7 pinout, STM32F303RET7 application, or STM32F303RET7 equivalent, this MCU delivers deterministic DSP performance, hardware-accelerated math operations, flexible clocking (HSE/LSE/HSI/LSI), and robust peripheral coexistence-especially for closed-loop analog-digital control where op-amp PGA mode, comparator hysteresis, and timer-deadtime generation are critical.

Technical Context

The STM32F303RET7 implements a tightly coupled Cortex-M4 core with single-cycle MAC, hardware divide, and optional memory protection unit (MPU), enabling deterministic execution in safety-aware embedded control. Its interconnect matrix decouples bus arbitration between CPU, DMA, and peripherals-reducing latency for time-critical ADC sampling and PWM update cycles.

Analog subsystem integration includes independent voltage domains: VDDA (2.0–3.6 V) for ADCs/comparators, VREFOPAMP (2.4–3.6 V) for op-amps, and dedicated VREFINT calibration-supporting simultaneous high-resolution acquisition, fast comparator response (<100 ns), and programmable gain amplifier configurations without external components.

Key Specifications

Pinout & Package

LQFP64 (10 × 10 mm, 0.5 mm pitch) package with exposed thermal pad; 64-pin square outline, 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 microcontroller applications.

Compared with STM32F303RBT6, the RET7 offers 4× more Flash and 5× more SRAM for larger control models or firmware-over-the-air storage; versus STM32G431RBT6, it retains FSMC and mature CAN 2.0B support but trades off peak clock speed and latest analog specs for proven industrial deployment stability.

Availability

STM32F303RET7 is available at Aetrix Electronics and suitable for motor control systems, digital power converters, industrial sensor nodes, and human-machine interfaces requiring stable component supply across multi-year production cycles.

Supply support for STM32F303RET7 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-rich embedded applications-specifically engineered to integrate precision signal conditioning, real-time control, and communication in a single chip for motor drives, power supplies, and smart sensors.

FAQ

What is the maximum operating frequency and corresponding supply voltage range?

The STM32F303RET7 achieves 72 MHz operation across its full VDD range of 2.0–3.6 V. At 3.6 V, it delivers 90 DMIPS; at 2.0 V, core frequency is limited to 48 MHz per electrical characteristics (Section 6.3.1). All analog peripherals maintain specified accuracy within this voltage window, with VDDA independently regulated.

Does the device support hardware-based cryptographic acceleration?

No. The STM32F303RET7 does not include dedicated cryptographic accelerators (e.g., AES, SHA, PKA). It relies on software libraries for encryption tasks. For hardware crypto, ST's STM32L4+, STM32G0, or STM32H7 families provide TRNG, AES-128/256, and HASH engines-this part focuses on analog/motor control rather than security-critical functions.

How many ADC channels can be sampled simultaneously with hardware synchronization?

Up to four ADCs (ADC1–ADC4) can be triggered synchronously via shared external events or timer outputs. Each ADC supports up to 16 channels, but simultaneous sampling across all four requires careful routing of common trigger sources (e.g., TIM2 TRGO) and matching sampling times-achieving true interleaved acquisition for three-phase current/voltage monitoring.

Is the LQFP64 package lead-free and RoHS-compliant?

Yes. The STM32F303RET7 in LQFP64 packaging meets RoHS Directive 2011/65/EU and REACH Regulation (EC) No. 1907/2006. ST specifies "Pb-free, halogen-free, and antimony-free" construction with matte tin plating on leads. Full compliance documentation-including test reports and material declarations-is available in ST's official product change notices (PCNs) and quality portal.