STMicroelectronics STM32F303RET6TR

Overview

STM32F303RET6TR from STMicroelectronics is an ARM® Cortex®-M4 32-bit microcontroller with FPU, 72 MHz max clock, 512 KB Flash, 80 KB SRAM (64 KB + 16 KB CCM), and integrated analog peripherals including four operational amplifiers, seven comparators, two 12-bit DACs, and four ADCs (up to 40 channels, 0.20 µs conversion). It operates from 2.0–3.6 V and targets motor control, digital power conversion, and industrial sensing systems requiring mixed-signal real-time processing.

For engineers reviewing the STM32F303RET6TR datasheet, STM32F303RET6TR pinout, STM32F303RET6TR application, or STM32F303RET6TR equivalent, key selection criteria include its dual 12-bit DACs with 2.4–3.6 V analog supply, rail-to-rail comparators, PGA-capable op-amps, CAN 2.0B interface, and LQFP64 package compatibility for space-constrained embedded designs.

Technical Context

The STM32F303RET6TR implements a tightly coupled Cortex-M4 core with hardware floating-point unit, memory protection unit (MPU), and DSP instruction set - enabling deterministic execution of motor control algorithms and digital signal processing tasks. Its interconnect matrix enables concurrent peripheral access without bus contention.

Analog subsystem integration includes four independently configurable op-amps (all terminals accessible, PGA mode supported), seven ultra-fast comparators with programmable hysteresis, and four ADCs sharing a common analog domain but supporting independent trigger sources and resolution settings (6/8/10/12 bits). The flexible static memory controller (FSMC) supports external SRAM, PSRAM, NOR, and NAND memories with configurable timing.

Key Specifications

Pinout & Package

LQFP64 package: 64-pin quad flat pack with 0.5 mm lead pitch, 10 × 10 mm body size, exposed thermal pad (EP), moisture sensitivity level 3 (MSL3), 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 RET6 offers compact LQFP64 packaging and sufficient analog resources for mid-tier motor control, while STM32G431KBT6 trades FSMC and comparator count for higher CPU speed and lower power - making it optimal for latency-critical digital power control without external memory needs.

Availability

STM32F303RET6TR 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 and long-term industrial lifecycle support.

Supply support for STM32F303RET6TR 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, MEMS, and automotive-grade components since 1987.

The STM32F3 series targets cost-sensitive, analog-rich embedded applications - combining high-precision mixed-signal peripherals with Cortex-M4 performance to simplify system architecture in motor control, digital power, and industrial sensing.

FAQ

What is the maximum operating frequency and core type of the STM32F303RET6TR?

The STM32F303RET6TR features an ARM Cortex-M4 core with integrated FPU, running at up to 72 MHz. It delivers 90 DMIPS performance with single-cycle multiplication and hardware division. The core includes a Memory Protection Unit (MPU) and supports DSP instructions, making it suitable for real-time control and signal processing tasks without external co-processors.

Does the STM32F303RET6TR support external memory expansion?

Yes - the STM32F303RET6TR integrates a Flexible Static Memory Controller (FSMC) supporting asynchronous and synchronous external memories including SRAM, PSRAM, NOR Flash, NAND Flash, and PC Card. It provides four chip-select lines and configurable timing parameters (address setup, data hold, wait states), enabling direct connection to displays, legacy peripherals, or memory-mapped I/O without external logic.

How many analog comparators and operational amplifiers does this MCU include?

The STM32F303RET6TR integrates seven ultra-fast rail-to-rail analog comparators and four fully configurable operational amplifiers. All op-amp inputs and outputs are accessible via GPIO pins, and they support programmable gain (1× to 100×) in PGA mode. Comparators feature selectable hysteresis and window mode, enabling robust overvoltage detection and threshold monitoring in power and sensor applications.

Is the STM32F303RET6TR pin-compatible with other STM32F3 series MCUs in LQFP64?

No - the STM32F303RET6TR is not fully pin-compatible with other LQFP64-packaged STM32F3 devices (e.g., STM32F301, STM32F302, STM32F334) due to differences in peripheral mapping, alternate function assignments, and power pin placement. Pin compatibility is limited to same-subfamily variants (e.g., STM32F303RCT6), and migration requires verification of GPIO remapping, clock tree configuration, and analog peripheral routing per the reference manual.