STMicroelectronics STM32F303RET6

Overview

STM32F303RET6 from STMicroelectronics is an ARM® Cortex®-M4 32-bit MCU 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 12-bit ADCs, two 12-bit DACs, seven rail-to-rail comparators, and four operational amplifiers. It supports CAN 2.0B, USB 2.0 FS, and capacitive touch sensing - deployed in motor control, digital power supplies, and industrial sensor hubs.

For engineers reviewing the STM32F303RET6 datasheet, STM32F303RET6 pinout, STM32F303RET6 application, or STM32F303RET6 equivalent, key selection criteria include its dual 12-bit DAC channels with 2.4–3.6 V analog supply, 115 fast I/Os (several 5 V-tolerant), flexible memory controller (FSMC), and hardware parity on critical SRAM blocks for safety-critical firmware execution.

Technical Context

The STM32F303RET6 implements a tightly coupled Cortex-M4 core with single-cycle MAC, HW division, and DSP extensions - enabling real-time motor control algorithms with deterministic timing. Its interconnect matrix enables concurrent peripheral access without bus contention, supporting simultaneous ADC sampling, DAC output, and CAN message transmission.

Analog subsystem integration includes op-amps configurable as programmable gain amplifiers (PGA) with all terminals accessible, plus ultra-fast comparators (<100 ns propagation delay) and a dedicated touch-sensing controller (TSC) supporting 24 channels. All analog blocks share independent supply domains (VDDA 2.0–3.6 V, VREFOPAMP 2.4–3.6 V) for noise isolation.

Key Specifications

Pinout & Package

LQFP64 package (10 × 10 mm, 0.5 mm pitch), thermally enhanced with exposed thermal pad - compatible with standard reflow profiles and industrial PCB assembly processes.

Key Features

Applications

Equivalent & Alternatives

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

Compared with STM32F303RDT6, the RET6 offers larger Flash/SRAM and CCM parity for functional safety; versus STM32F405RGT6, it trades raw speed for on-chip analog integration - making it optimal for compact, self-contained mixed-signal control nodes.

Availability

STM32F303RET6 is available at Aetrix Electronics and suitable for motor control, digital power supplies, industrial sensor hubs, and human-machine interface applications requiring stable component supply and long-term manufacturability.

Supply support for STM32F303RET6 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 management ICs, sensors, and analog products for industrial, automotive, and consumer markets.

The STM32F3 series targets cost-sensitive, high-precision analog-digital hybrid applications - emphasizing integrated op-amps, comparators, and capacitive touch to reduce external component count in motor control and power conversion systems.

FAQ

What is the maximum operating frequency and core type of the STM32F303RET6?

The STM32F303RET6 features an ARM Cortex-M4 core with FPU, running at a maximum frequency of 72 MHz. It delivers 90 DMIPS performance and supports DSP instructions and a memory protection unit (MPU). This core enables real-time control algorithms with floating-point precision, such as field-oriented motor control and digital power loop compensation.

Does the STM32F303RET6 support hardware cryptographic acceleration?

No, the STM32F303RET6 does not include dedicated hardware cryptographic accelerators (e.g., AES, SHA, PKA). It relies on software libraries for encryption tasks. For secure boot or TLS offload, designers should consider the STM32L4 or STM32H7 series, which integrate cryptographic peripherals and secure key storage.

What analog supply voltages are required for the ADC, DAC, and op-amps?

The ADC requires VDDA between 2.0 V and 3.6 V; DAC and op-amps require a separate analog supply (VREFOPAMP) between 2.4 V and 3.6 V. These independent domains ensure noise isolation: VDDA powers ADC reference and input stages, while VREFOPAMP sets op-amp output swing and DAC full-scale range - both must be decoupled with low-ESR capacitors per datasheet layout guidelines.

Is the STM32F303RET6 pin-compatible with other STM32F3 packages?

The STM32F303RET6 in LQFP64 is pin-compatible with other STM32F303x6 variants (e.g., STM32F303CCT6, STM32F303CBT6) sharing the same 64-pin count, but not with 100-, 144-, or 100-ball UFBGA/WLCSP packages. Pin mappings for peripherals like CAN, USB, and ADC remain consistent across LQFP64 variants - enabling drop-in replacement within the same package family.