STMicroelectronics STM32F302RBT6

Overview

STM32F302RBT6 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), two 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 2.0 FS, five USART/UARTs, three SPIs (two with I2S), two I²C Fast-mode-plus interfaces, and capacitive touch sensing - deployed in motor control, digital power supplies, and industrial sensor nodes.

For engineers reviewing the STM32F302RBT6 datasheet, STM32F302RBT6 pinout, STM32F302RBT6 application, or STM32F302RBT6 equivalent, key selection criteria include its dual ADC timing precision, integrated analog front-end (PGA + COMP + DAC), 5 V-tolerant GPIOs, LQFP64 package compatibility, and support for real-time control loops requiring sub-microsecond analog sampling and deterministic interrupt latency.

Technical Context

The STM32F302RBT6 implements a tightly coupled Cortex-M4 core with hardware FPU and MPU, enabling simultaneous floating-point math and memory-protected task isolation. Its analog subsystem includes two independent ADCs with selectable 6/8/10/12-bit resolution, differential input capability, and dedicated analog supply (2.0–3.6 V), plus a 12-bit DAC with 2.4–3.6 V analog rail support.

Timing architecture combines a 32-bit general-purpose timer, six 16-bit timers (including advanced-control TIM1 with deadtime generation and emergency stop), RTC with calendar and alarm, and clock sources including 4–32 MHz HSE, 32 kHz LSE, 8 MHz HSI (PLL-ready), and 40 kHz LSI - all managed via RCC with dynamic voltage scaling for low-power operation.

Key Specifications

Pinout & Package

LQFP64 package (10 × 10 mm, 0.5 mm pitch) with exposed thermal pad; 64-pin quad flat configuration supporting full peripheral mapping and debug access via SWD/JTAG.

Key Features

Applications

Equivalent & Alternatives

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

Compared with STM32F303RBT6, the STM32F302RBT6 trades Flash/SRAM headroom for cost efficiency while retaining identical analog IP and CAN capability; versus STM32G431RBT6, it prioritizes fieldbus integration over raw ADC speed, making it optimal for CAN-based motor drives and sensor networks.

Availability

STM32F302RBT6 is available at Aetrix Electronics and suitable for motor control systems, digital power supplies, industrial sensor nodes, and human-machine interfaces requiring stable component supply across multi-year production cycles.

Supply support for STM32F302RBT6 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, specializing in microcontrollers, power management, sensors, and automotive ICs with vertical manufacturing and broad industrial certification coverage.

The STM32F3 series targets cost-sensitive, analog-intensive applications - designed to integrate high-precision signal conditioning, real-time control, and industrial connectivity into a single chip for motor drives, power converters, and smart sensors.

FAQ

What is the maximum operating frequency and supported voltage range?

The STM32F302RBT6 operates at up to 72 MHz with a VDD/VDDA supply range of 2.0 V to 3.6 V. Its internal 8 MHz RC oscillator can be multiplied via PLL to achieve full-speed operation, and the programmable voltage detector (PVD) provides eight adjustable thresholds for brownout monitoring within this range.

Does this MCU support hardware cryptographic acceleration?

No, the STM32F302RBT6 does not include hardware cryptographic accelerators such as AES, SHA, or PKA engines. Security relies on software libraries or external secure elements; for hardware crypto, consider STM32L4 or STM32H7 series devices with dedicated crypto peripherals.

How many 5 V-tolerant I/O pins does the LQFP64 package provide?

The STM32F302RBT6 in LQFP64 offers 19 5 V-tolerant GPIOs, including PA0–PA7, PB0–PB1, and PB12–PB15. These pins tolerate 5 V logic levels while powered from 3.3 V, enabling direct connection to legacy 5 V peripherals without level shifters.

Is the USB interface compliant with USB Battery Charging Specification v1.2?

No, the STM32F302RBT6 USB 2.0 full-speed interface supports device-mode enumeration and data transfer only; it lacks dedicated D+/D− pull-up/pull-down control and BC1.2 detection logic. External circuitry or a companion charger-detection IC is required for USB charging port identification.