STM32F103CBT6 | STMicroelectronics | 32-bit General-Purpose MCU (Microcontroller) based on ARM Cortex‑M3 Core

Key Specifications

Core: ARM Cortex‑M3, up to 72MHz, with hardware single-precision FPU, 90 DMIPSMemory: Flash 128KB, SRAM 20KBSupply Voltage: 2.0V ~ 3.6VTemperature Range: -40℃ ~ +85℃ (Industrial grade, non AEC-Q100 automotive grade)Package: LQFP-48, 37 I/O pinsAnalog Peripherals: 2 × 12-bit ADC (10 channels), 1 × voltage comparatorCommunication Interfaces: 2 × SPI, 2 × I2C, 3 × USART, 1 × CAN, USB 2.0 Full-SpeedTimers: 4 general-purpose 16-bit timers, 1 advanced PWM timer (supports PWM output for motor drive)Debug Interface: SWD / JTAG

Suffix Explanation: C = LQFP48; B = 128KB Flash; T = Temperature range -40~85℃; 6 = MSL3 moisture sensitivity levelFull Order Part Number: STM32F103CBT6TR (Tape-and-Reel packaging)

Main Features

General embedded main controller. Cortex-M3 core with rich peripherals, abundant development resources, mature ecosystem and cost-effective.The advanced timer can output multi-channel PWM for motor driving, LED dimming and simple drone ESC control.CAN bus interface: connects to industrial bus for device networking.USB Full-Speed interface: supports USB virtual COM port and USB device communication.ADC for analog signal acquisition, to read analog signals from temperature/humidity, pressure and gas sensors.Supports RTOS real-time operating system for simple multi-task control.Built-in watchdog prevents program runaway and improves long-term equipment stability.

Applications

Drones & Robotics

Auxiliary MCU for simple flight controllers, main controller for small ESCs, gimbal control boardsLow-level control for small AGVs and wheeled robots

Industrial Automation

Industrial acquisition boards, sensor signal acquisition modulesSimplified PLCs, valve controllers, relay control boardsMainboards for instruments and test equipment

IoT & Smart Home

Smart home controllers, main MCU for sensor modulesWireless sensing nodes

Consumer Electronics

Main controller for small home appliances, LED lighting drivers, portable test instrumentsDevelopment boards for prototype verification by universities and R&D engineers

Remarks

The STM32F103 is a classic "workhorse MCU", widely used for project sampling and small devices. However, many new high-end projects have migrated to F4 / H7 series.Advantages: Low cost, abundant reference materials, low development barrier. Limitation: Limited computing power, not suitable for complex IMU attitude solution (F4/H7 recommended for complex attitude calculation).Note: It is not automotive-grade and cannot be used in automotive safety-related projects.