STMicroelectronics STM32F103C6T6

Overview

STM32F103C6T6 from STMicroelectronics is a low-density performance-line ARM Cortex-M3 microcontroller with 32 KB Flash, 10 KB SRAM, 72 MHz CPU clock, USB 2.0 full-speed interface, and CAN 2.0B controller-used in industrial motor control, sensor node firmware, and embedded HMI front-ends requiring real-time I/O and mixed-signal integration.

For engineers reviewing the STM32F103C6T6 datasheet, STM32F103C6T6 pinout, STM32F103C6T6 application, or STM32F103C6T6 equivalent, key selection criteria include Flash/SRAM capacity, USB+CAN coexistence, 12-bit dual ADC timing, LQFP48 package compatibility, and SWD debug support for rapid firmware iteration.

Technical Context

The STM32F103C6T6 implements an ARM Cortex-M3 core with Harvard architecture, single-cycle multiplication, hardware divide, and nested vectored interrupt controller (NVIC) supporting up to 60 interrupts. Its clock system integrates a 4–16 MHz external crystal oscillator, 8 MHz factory-trimmed RC, 40 kHz LSI, and PLL for scalable 72 MHz operation.

Peripheral interconnect uses AHB/APB buses with DMA-driven data movement across two 12-bit ADCs (1 µs conversion), six timers (including motor-control PWM with dead-time), and six communication interfaces-including USB full-speed PHY, CAN transceiver, two USARTs with LIN/IrDA, SPI (18 Mbit/s), and I²C (SMBus/PMBus).

Key Specifications

Pinout & Package

LQFP48 (7 × 7 mm, 0.5 mm pitch) package with exposed thermal pad; RoHS-compliant ECOPACK® construction.

Key Features

Applications

Equivalent & Alternatives

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

Compared with STM32F030F4P6, the STM32F103C6T6 delivers CAN+USB coexistence and higher deterministic performance; versus STM32F103C8T6, it trades memory headroom for tighter cost control while retaining identical peripheral set and timing behavior.

Availability

STM32F103C6T6 is available at Aetrix Electronics and suitable for industrial motor control, smart sensor nodes, USB human interface devices, and automotive diagnostic tools requiring stable component supply across multi-year production cycles.

Supply support for STM32F103C6T6 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, designing and manufacturing microcontrollers, power ICs, sensors, and analog products for industrial, automotive, and consumer markets.

The STM32F1 series targets cost-sensitive, high-integration embedded applications demanding real-time responsiveness, mixed-signal capability, and broad ecosystem support - with the F103x6 variant optimized for USB+CAN-enabled edge controllers.

FAQ

What is the maximum operating temperature range for the STM32F103C6T6?

The STM32F103C6T6 is specified for industrial temperature range: –40 °C to +85 °C. This rating is validated per JEDEC JESD47 and applies to all electrical characteristics in the datasheet, including Flash write endurance and ADC linearity. Thermal derating is not required within this range under standard PCB copper pour and airflow conditions.

Does the STM32F103C6T6 support external memory interfaces like FSMC or OCTOSPI?

No, the STM32F103C6T6 does not include FSMC, OCTOSPI, or any external memory controller. Its memory subsystem is limited to on-chip 32 KB Flash and 10 KB SRAM. External storage must be implemented via SPI, I²C, or USART peripherals - for example, using SPI-connected NOR flash or SD cards with FatFS middleware.

Can the internal 8 MHz RC oscillator be used as the system clock source without calibration?

Yes, the internal 8 MHz RC oscillator is factory-trimmed to ±1% accuracy at 25 °C and can serve as the system clock source without external crystal or runtime calibration. However, its frequency drifts ±3% over the full –40 °C to +85 °C range, making it unsuitable for USB or CAN timing-critical applications where ±0.25% stability is required.

How many independent PWM outputs does the STM32F103C6T6 support simultaneously?

The STM32F103C6T6 supports up to 16 independent PWM outputs: 4 from TIM2, 4 from TIM3, and 4 from TIM4 (all 16-bit general-purpose timers), plus 2 complementary outputs from TIM1 (16-bit advanced-control timer). All channels support programmable duty cycle, frequency, and dead-time insertion where applicable.