STMicroelectronics STM32F303RBT7TR

Overview

STM32F303RBT7TR from STMicroelectronics is an Arm® Cortex®-M4 32-bit MCU with FPU, operating up to 72 MHz, featuring 128 KB Flash, 40 KB SRAM (with HW parity on first 16 KB), and integrated analog peripherals including four 12-bit ADCs, two 12-bit DACs, seven rail-to-rail comparators, and four operational amplifiers usable as programmable-gain amplifiers (PGAs). It supports CAN 2.0B, USB Full-Speed, and capacitive touch sensing - deployed in motor control and industrial sensor interface systems.

For engineers reviewing the STM32F303RBT7TR datasheet, STM32F303RBT7TR pinout, STM32F303RBT7TR application, or STM32F303RBT7TR equivalent, key selection criteria include its dual DAC channels with 2.4–3.6 V analog supply, 72 MHz deterministic real-time performance with MPU, 5 V-tolerant I/Os, and integrated analog signal chain for closed-loop control.

Technical Context

The device implements a tightly coupled Cortex-M4 core with single-cycle multiply, hardware divide, DSP extensions, and Memory Protection Unit (MPU) for secure task isolation. Its analog subsystem integrates four independent OPAMPs configurable as PGAs with external feedback paths, enabling precision gain adjustment without external components.

Clock architecture includes dual oscillators (4–32 MHz HSE + 32.768 kHz LSE), internal 8 MHz RC with PLL multiplication, and dedicated clock trees for analog (ADC/DAC/COMP/OPAMP) and digital domains - ensuring synchronized low-jitter sampling and deterministic timing for mixed-signal control loops.

Key Specifications

Pinout & Package

LQFP64 package with exposed thermal pad (ECOPAD™), 0.5 mm pitch, 10 × 10 mm body size, 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 STM32F303RBT7TR, the STM32F303K8T6 sacrifices analog integration and connectivity for size/cost, while the STM32F411REY6TR trades integrated analog precision for raw processing headroom - making the RBT7TR optimal for mixed-signal control where on-chip PGA, DAC, and CAN coexist.

Availability

STM32F303RBT7TR is available at Aetrix Electronics and suitable for industrial motor control, medical sensor hubs, smart building HVAC systems, and automated test equipment requiring stable component supply across long-lifecycle deployments.

Supply support for STM32F303RBT7TR 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 ICs, sensors, and automotive semiconductors since 1987.

The STM32F3 series targets cost-sensitive, analog-rich embedded applications - emphasizing integrated precision analog peripherals, real-time determinism, and industrial-grade reliability in a single-chip solution.

FAQ

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

The STM32F303RBT7TR achieves a maximum CPU frequency of 72 MHz using its internal 8 MHz RC oscillator multiplied by a programmable PLL with division factors. This requires configuring the PLL source (HSI or HSE), multiplication factor (up to ×9), and APB prescalers. The 72 MHz clock is validated across the full industrial temperature range and supply voltage (2.0–3.6 V) per DS9118 Rev 14 Section 6.3.9.

Does this MCU support hardware-accelerated cryptographic operations?

No, the STM32F303RBT7TR does not include dedicated cryptographic accelerators (e.g., AES, SHA, PKA). It relies on software libraries for encryption. For hardware crypto, consider STM32L4+, STM32H7, or STM32WB series. The F303's security features are limited to the Memory Protection Unit (MPU) and read-out protection (RDP) levels.

Can the integrated OPAMPs be used without external resistors in PGA mode?

Yes - all four OPAMPs support internal programmable gain (1× to 128×) via dedicated registers, eliminating need for external feedback resistors. Gain selection is done through OPAMPx_CSR register bits (PGA_GAIN[2:0]), and the internal resistor network is factory-trimmed for ±1% accuracy across temperature (DS9118 Rev 14 Section 6.3.21).

What debug interfaces are supported and what pins do they use?

The device supports Serial Wire Debug (SWD) using SWCLK (PA14) and SWDIO (PA13) pins, plus full JTAG (TCK, TMS, TDI, TDO, TRST) on dedicated pins. SWD is recommended for minimal pin count; both interfaces support breakpoints, watchpoints, and real-time memory access via ST-LINK v2/v3 debug probes per Section 3.27.1 of the datasheet.