STMicroelectronics STM32F302RBT7

Overview

STM32F302RBT7 from STMicroelectronics is an Arm® Cortex®-M4 32-bit MCU with FPU, operating up to 72 MHz, featuring 128 KB Flash, 40 KB SRAM (16 KB with HW parity), dual 12-bit ADCs (17-channel, 0.20 µs conversion), one 12-bit DAC, four rail-to-rail comparators, and two programmable-gain operational amplifiers. It integrates CAN 2.0B, USB FS, five USART/UARTs, three SPIs (two with I2S), two I²C interfaces, RTC with alarm, and capacitive touch sensing - deployed in motor control, digital power supplies, and industrial sensor nodes.

For engineers reviewing the STM32F302RBT7 datasheet, STM32F302RBT7 pinout, STM32F302RBT7 application, or STM32F302RBT7 equivalent, key selection criteria include analog peripheral integration (PGA, COMP, DAC), real-time timer architecture (advanced-control TIM1 with deadtime), CAN+USB coexistence, and LQFP64 package compatibility for space-constrained embedded control designs.

Technical Context

The device implements a tightly coupled Cortex-M4 core with single-cycle MAC, hardware divide, DSP extensions, and MPU-enabling deterministic execution in closed-loop control. Its analog subsystem includes independent VDDA supply (2.4–3.6 V) for DAC and OPAMPs, and shared 2–3.6 V analog domain for ADCs and comparators with selectable resolution (6/8/10/12 bits).

Clock architecture supports four oscillators: 4–32 MHz HSE, 32.768 kHz LSE for RTC, 8 MHz HSI with PLL (up to 72 MHz), and 40 kHz LSI. The interconnect matrix enables concurrent peripheral DMA access without CPU arbitration bottlenecks, critical for high-throughput sensor fusion and PWM generation.

Key Specifications

Pinout & Package

LQFP64 (10 × 10 mm, 0.5 mm pitch) package with exposed thermal pad - provides mechanical stability and thermal dissipation for continuous 72 MHz operation in ambient temperatures up to 105°C.

Key Features

Applications

Equivalent & Alternatives

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

Compared with STM32F303RBT7, this part trades bootloader memory and one ADC channel for lower cost and identical CAN/USB feature set; versus STM32G431RBT6, it retains CAN 2.0B at the expense of peak processing bandwidth - making it optimal for cost-sensitive industrial nodes requiring fieldbus interoperability.

Availability

STM32F302RBT7 is available at Aetrix Electronics and suitable for motor control, digital power supplies, and industrial sensor nodes requiring stable component supply across extended product lifecycles.

Supply support for STM32F302RBT7 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-intensive embedded control applications - emphasizing integrated signal conditioning, real-time responsiveness, and functional safety readiness for appliances, power tools, and factory automation.

FAQ

What is the maximum operating temperature for STM32F302RBT7?

The STM32F302RBT7 is rated for industrial temperature range (–40°C to +105°C). Thermal performance is validated per JEDEC JESD51-2, with θ_JA = 42°C/W in LQFP64 package. Derating applies above 85°C ambient when operating at full 72 MHz with all peripherals active; ST AN4821 recommends limiting VDDA current draw to maintain ADC accuracy within spec.

Does STM32F302RBT7 support hardware encryption?

No, STM32F302RBT7 does not include hardware cryptographic accelerators (AES, SHA, PKA). It relies on software libraries (e.g., Mbed TLS) for encryption. For secure boot or key storage, external secure elements or higher-series MCUs like STM32L5 or STM32H7 are required. The device does provide 96-bit unique ID and write-protected option bytes for basic identity binding.

Can the internal OPAMPs be used in transimpedance configuration?

Yes - both OPAMPs support transimpedance amplifier (TIA) mode with configurable gain (1–16×) and selectable non-inverting/inverting input. The inverting input is accessible on dedicated pins (e.g., PA1 for OPAMP1), and the output can drive ADC inputs directly. Designers must ensure photodiode bias voltage remains within 2.4–3.6 V and use recommended compensation capacitor values per AN4917.

Is USB DFU supported out-of-the-box on STM32F302RBT7?

Yes - the device includes a ROM-based USB DFU bootloader accessible via system memory boot mode (BOOT0=1, BOOT1=0). It supports mass storage-class firmware upload over USB without external programmer. However, user application code must configure USB descriptors and handle DFU state machine transitions; ST's UM1721 provides complete implementation guidance and example projects.