STMicroelectronics STM32F302CBT6TR

Overview

STM32F302CBT6TR from STMicroelectronics is a 32-bit Arm® Cortex®-M4 microcontroller with FPU, operating up to 72 MHz, featuring 128 KB Flash, 40 KB SRAM (16 KB with HW parity), dual 12-bit ADCs (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 USARTs, three SPIs with I2S, and capacitive touch sensing - deployed in motor control and industrial sensor interface systems.

For engineers reviewing the STM32F302CBT6TR datasheet, STM32F302CBT6TR pinout, STM32F302CBT6TR application, or STM32F302CBT6TR equivalent, key selection criteria include analog peripheral supply ranges (2.0–3.6 V for ADC/COMP, 2.4–3.6 V for DAC/OPAMP), 5 V-tolerant I/O count (up to 87), and integrated PGAs supporting closed-loop current sensing in BLDC drives.

Technical Context

The device implements a tightly coupled Cortex-M4 core with single-cycle multiply, hardware divide, DSP extensions, and MPU for memory protection. Its analog subsystem includes two independent ADCs with selectable 6/8/10/12-bit resolution, differential input capability, and dedicated analog supply (V_DDA: 2.0–3.6 V).

Digital peripherals are coordinated via an interconnect matrix enabling concurrent access to Flash, SRAM, and peripherals. Clock management supports four oscillator sources (HSE 4–32 MHz, LSE 32.768 kHz, HSI 8 MHz, LSI 40 kHz) and a PLL for system clock generation up to 72 MHz.

Key Specifications

Pinout & Package

LQFP64 package (10 × 10 mm, 0.5 mm pitch), 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 STM32F302CBT6TR, STM32F303CBT6 offers more Flash/SRAM but removes PGA functionality essential for shunt-based current sensing, while STM32G431CBT6 delivers superior analog precision and speed at identical footprint - making it a forward-compatible upgrade path for performance-critical applications.

Availability

STM32F302CBT6TR is available at Aetrix Electronics and suitable for motor control systems, industrial sensor interfaces, human-machine interfaces, and power supply monitors requiring stable component supply across extended production lifecycles.

Supply support for STM32F302CBT6TR 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 applications - combining high-resolution ADCs, op-amps, comparators, and motor control timers in a single chip to reduce system complexity and bill-of-materials cost.

FAQ

What is the maximum operating frequency and supported voltage range?

The STM32F302CBT6TR operates at up to 72 MHz using its internal PLL. Its VDD and VDDA supply range is 2.0 V to 3.6 V, with separate analog and digital domains requiring independent decoupling. The device supports low-power modes down to 1.65 V in Stop mode with RTC active, but full functionality requires minimum 2.0 V on both supplies.

Does this MCU support hardware encryption or secure boot features?

No, the STM32F302CBT6TR does not integrate hardware cryptographic accelerators (AES, SHA, PKA) or secure boot ROM. It relies on software-based security measures and optional external secure elements. For certified secure boot, ST recommends the STM32L5 or STM32H7 series with TrustZone and embedded root-of-trust.

Can the integrated operational amplifiers be used as standalone instrumentation amplifiers?

The two OPAMPs support PGA configuration with gains from 1× to 100×, but lack dedicated instrumentation amplifier topology (three-opamp structure). They can be externally configured with precision resistors for basic IA behavior, though common-mode rejection ratio (CMRR) is not specified - use only where moderate CMRR suffices, such as motor phase current sensing.

Is the USB interface compliant with USB Battery Charging (BC) 1.2 specification?

No, the USB 2.0 Full-Speed interface in STM32F302CBT6TR supports device enumeration and data transfer only. It lacks dedicated BC 1.2 detection circuitry (D+/- voltage sensing, CDP/DCP identification logic) - external USB port controllers or dedicated BC ICs are required for charging port classification.