STMicroelectronics STM32F103C6T6A

Overview

STM32F103C6T6A from STMicroelectronics is a low-density performance-line ARM Cortex-M3 microcontroller featuring 32 KB Flash, 10 KB SRAM, 72 MHz CPU clock, USB 2.0 full-speed interface, and CAN 2.0B support. It integrates dual 12-bit ADCs (1 µs conversion), six timers including motor-control PWM with dead-time generation, and operates across 2.0–3.6 V supply for industrial sensor nodes and motor control edge devices.

For engineers reviewing the STM32F103C6T6A datasheet, STM32F103C6T6A pinout, STM32F103C6T6A application, or STM32F103C6T6A equivalent, key selection criteria include Flash/SRAM size, USB/CAN coexistence, 48-pin LQFP package compatibility, and real-time peripheral count (2×ADC, 6×timers, 6×comm interfaces) in cost-sensitive embedded designs.

Technical Context

The STM32F103C6T6A implements an ARM Cortex-M3 core with Harvard bus architecture, single-cycle multiplication, and hardware divide, delivering 1.25 DMIPS/MHz at 72 MHz with zero-wait-state Flash access. Its clock system combines 4–16 MHz external crystal, 8 MHz internal RC, and PLL-based CPU clock scaling.

Peripheral integration includes nested vectored interrupt controller (NVIC) supporting 68 interrupts, DMA controller with 7 channels servicing ADC, timers, SPI/I²C/USART, and dedicated CAN 2.0B controller with 14-mailbox FIFO-enabling deterministic real-time communication in automotive body electronics and industrial PLC modules.

Key Specifications

Pinout & Package

LQFP48 package with exposed thermal pad (ECOPACK® compliant), 48 leads, 0.5 mm pitch, 7 × 7 mm body size, and operating ambient temperature range of –40°C to +85°C.

Key Features

Applications

Equivalent & Alternatives

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

Compared with STM32F103C8T6, the C6T6A trades Flash headroom for lower unit cost and smaller code footprint - ideal for fixed-function firmware; versus LPC1769, it delivers superior USB integration and lower BOM complexity despite slightly lower clock speed.

Availability

STM32F103C6T6A is available at Aetrix Electronics and suitable for industrial motor control, USB-capable diagnostic tools, and smart sensor nodes requiring stable component supply and long-term manufacturability.

Supply support for STM32F103C6T6A 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 management ICs, sensors, and automotive-grade components since 1987.

The STM32F103x6 product line targets cost-sensitive, resource-constrained embedded applications demanding USB connectivity, real-time control, and industrial temperature reliability - optimized for motor drives, HMI panels, and field instrumentation.

FAQ

What is the maximum operating frequency and associated power consumption of the STM32F103C6T6A?

Maximum CPU frequency is 72 MHz with typical active current of 36 mA at 3.3 V and 72 MHz (code running from Flash, all peripherals enabled). In Sleep mode, current drops to 14 mA; Stop mode draws 3.5 µA with RTC active and VBAT supplied - verified per datasheet Table 13 and Table 16 under standard conditions.

Does the STM32F103C6T6A support USB device functionality without external components?

Yes - it integrates a full-speed USB 2.0 transceiver with internal pull-up resistors and differential signaling circuitry. Only a USB connector and optional ESD protection diodes are required; no external PHY or series resistors are needed for basic CDC or HID class operation.

How many ADC channels are accessible in the LQFP48 package, and what is their effective resolution?

The LQFP48 package exposes 10 ADC input channels (ADC1_IN0–IN9) across GPIO pins PA0–PA7, PB0–PB1. All channels maintain true 12-bit resolution with ±1 LSB INL/DNL and 1 µs conversion time - confirmed in datasheet Section 2.3.22 and Table 46.

What debug interfaces are supported, and which pins are used on the LQFP48 package?

Serial Wire Debug (SWD) is supported using SWDIO (PA13) and SWCLK (PA14); JTAG is also available but requires five pins (TMS, TCK, TDI, TDO, NRST). SWD is recommended for minimal pin usage - both modes support full flash programming, breakpoint setting, and real-time register inspection per Section 2.3.24.